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Submit a ProposalMicrobiological Interventions for Microplastics Remediation
One Line Description
Master the latest advancements in microbial degradation pathways and enzymatic breakdown with this definitive guide to overcoming the scalability and cost limitations of conventional microplastic removal.
Audience
Academics, industry professionals, policymakers, students, biotechnologists, material scientists, waste management professionals, environmental policymakers, and sustainability advocates interested in environmental sustainability and microplastic remediation.
Academics, industry professionals, policymakers, students, biotechnologists, material scientists, waste management professionals, environmental policymakers, and sustainability advocates interested in environmental sustainability and microplastic remediation.
Description
Microplastic pollution has emerged as a significant environmental challenge over the past few decades, largely due to the rapid expansion of plastic production and inadequate waste management systems. These microscopic plastic particles infiltrate marine, freshwater, and terrestrial ecosystems, impacting biodiversity, food chains, and even human health. Conventional approaches to addressing microplastic contamination, such as filtration, chemical degradation, and mechanical removal, have limitations in scalability, cost-effectiveness, and environmental sustainability. In response, the field of environmental microbiology and biotechnology has advanced significantly, offering promising solutions for plastic waste degradation. This book provides a comprehensive examination of the role of microbiology in mitigating microplastic pollution. It explores the intricate interactions between microplastics and microbial communities, highlighting cutting-edge research on microbial degradation pathways, enzymatic breakdown, and the potential for bioengineered solutions. The book is structured to provide a balanced blend of fundamental principles, recent scientific advancements, and practical applications in the field of microplastic bioremediation. By integrating knowledge from environmental microbiology, polymer chemistry, and sustainability sciences, this book serves as a valuable resource for researchers, academicians, environmental policymakers, and industry professionals seeking sustainable solutions to plastic pollution.
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Microplastic pollution has emerged as a significant environmental challenge over the past few decades, largely due to the rapid expansion of plastic production and inadequate waste management systems. These microscopic plastic particles infiltrate marine, freshwater, and terrestrial ecosystems, impacting biodiversity, food chains, and even human health. Conventional approaches to addressing microplastic contamination, such as filtration, chemical degradation, and mechanical removal, have limitations in scalability, cost-effectiveness, and environmental sustainability. In response, the field of environmental microbiology and biotechnology has advanced significantly, offering promising solutions for plastic waste degradation. This book provides a comprehensive examination of the role of microbiology in mitigating microplastic pollution. It explores the intricate interactions between microplastics and microbial communities, highlighting cutting-edge research on microbial degradation pathways, enzymatic breakdown, and the potential for bioengineered solutions. The book is structured to provide a balanced blend of fundamental principles, recent scientific advancements, and practical applications in the field of microplastic bioremediation. By integrating knowledge from environmental microbiology, polymer chemistry, and sustainability sciences, this book serves as a valuable resource for researchers, academicians, environmental policymakers, and industry professionals seeking sustainable solutions to plastic pollution.
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Author / Editor Details
Harshita Jain, PhD is an early-career academic researcher with a background in membrane separation technology, sustainable development, pollution management, and wastewater treatment. She has been involved in numerous academic and research activities, including the publication of articles in international journals and proceedings of international conferences. Innovations in clean technology, water and wastewater treatment, biosorption, vermicomposting, antibiotic resistance, public health, machine learning in disaster response, groundwater remediation, the impact of climate change, and artificial intelligence solutions for disaster preparedness are among her areas of interest.
Harshita Jain, PhD is an early-career academic researcher with a background in membrane separation technology, sustainable development, pollution management, and wastewater treatment. She has been involved in numerous academic and research activities, including the publication of articles in international journals and proceedings of international conferences. Innovations in clean technology, water and wastewater treatment, biosorption, vermicomposting, antibiotic resistance, public health, machine learning in disaster response, groundwater remediation, the impact of climate change, and artificial intelligence solutions for disaster preparedness are among her areas of interest.
Maulin P. Shah, PhD is an active researcher and scientific with more than 20 years of experience. He has published more than 250 research papers in national and international journals of repute and is the editor of 200 books. His research interests include biological wastewater treatment, environmental microbiology, biodegradation, bioremediation, and phytoremediation of environmental pollutants from industrial wastewaters.
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Table of Contents
List of Figures
List of Tables
List of Contributors
Foreword
Preface
Acknowledgements
Part I: Understanding Microplastics and Their Environmental Impact
1. Introduction to Microplastic Pollution
Harshita Jain and Maulin P. Shah
1.1 Introduction
1.2 Definition and Characteristics of Microplastics
1.3 Sources of Microplastics
1.3.1 Primary Sources
1.3.2 Secondary Sources
1.4 Classification of Microplastics
1.4.1 By Size and Shape
1.4.2 By Polymer Type
1.5 Environmental Pathways and Transport Mechanisms
1.6 Environmental Persistence and Degradation Resistance
1.7 Ecological and Human Health Implications
1.8 Microplastics as Vectors for Pollutants and Microorganisms
1.9 The Need for Interdisciplinary Approaches
1.10 Conclusion
References
2. Microplastics in Aquatic and Terrestrial Ecosystems
Kalpesh Solanki and Sagar Harwani
2.1 Introduction: The Ubiquitous Threat of Microplastic Pollution
2.2 Sources and Pathways of Microplastics into the Environment
2.2.1 Aquatic Ecosystems
2.2.1.1 Primary Microplastics
2.2.1.2 Secondary Microplastics
2.2.1.3 Specific Sources in Aquatic Environments
2.2.2 Terrestrial Ecosystems
2.2.2.1 Primary Microplastics in Terrestrial Settings
2.2.2.2 Secondary Microplastics in Terrestrial Settings
2.2.2.3 Specific Sources in Terrestrial Environments
2.3 Distribution and Abundance of Microplastics in Aquatic Ecosystems
2.3.1 Oceans
2.3.2 Freshwater Systems (Rivers, Lakes, and Streams)
2.3.3 Sediments
2.4 Distribution and Abundance of Microplastics in Terrestrial Ecosystems
2.4.1 Soils (Agricultural, Urban, and Forested)
2.4.2 Atmosphere
2.4.3 Organisms (Uptake by Terrestrial Biota)
2.5 Ecological Impacts in Aquatic Ecosystems
2.5.1 Ingestion and Physical Harm to Aquatic Organisms
2.5.2 Bioaccumulation of Pollutants and Transfer to Food Webs
2.5.3 Disruption of Ecological Processes
2.6 Ecological Impacts in Terrestrial Ecosystems
2.6.1 Impact on Soil Health and Properties
2.6.2 Effects on Terrestrial Biota (Microbes, Invertebrates, and Plants)
2.6.3 Potential for Trophic Transfer in Terrestrial Food Webs
2.7 Microplastics and Microorganisms: A Complex Interaction
2.7.1 Formation of the Plastisphere
2.7.2 Role of Microorganisms in Microplastic Degradation
2.7.3 Microplastics as Vectors for Other Pollutants and Pathogens
2.8 Trophic Transfer and Potential Biomagnification
2.8.1 Evidence in Aquatic Food Webs
2.8.2 Evidence in Terrestrial Food Webs
2.9 Dominant Types of Microplastics in Aquatic and Terrestrial Ecosystems
2.9.1 Aquatic Environments
2.9.2 Terrestrial Environments
2.10 Current Research Trends and Future Directions
2.11 Conclusion: Interconnected Ecosystems and the Imperative for Remediation
References
3. Health and Environmental Risks of Microplastics
Sagar Harwani and Kalpesh Solanki
3.1 Introduction
3.2 Detailed Analysis of Human Health Risks
3.2.1 Exposure Pathways and Associated Risks
3.2.1.1 Ingestion
3.2.1.2 Inhalation
3.2.1.3 Dermal Contact
3.2.2 Mechanisms of Toxicity
3.2.2.1 Physical Toxicity
3.2.2.2 Chemical Toxicity
3.2.2.3 Microbiological Toxicity
3.2.3 Specific Health Outcomes
3.2.3.1 Cardiovascular Effects
3.2.3.2 Respiratory Effects
3.2.3.3 Digestive Effects
3.2.3.4 Reproductive and Developmental Effects
3.2.3.5 Neurological Effects
3.2.3.6 Potential Links to Cancer
3.2.4 Risks for Vulnerable Populations
3.3 Comprehensive Examination of Environmental Risks
3.3.1 Ecological Disruption
3.3.2 Soil and Water Impacts
3.3.3 Vectors for Contaminants
3.3.4 Long-Term and Dose-Dependent Effects
3.4 The Nexus of Health and Environment
3.5 Current Knowledge Landscape and Research Directions
3.6 Mitigation Strategies and Recommendations
3.7 Conclusion
References
Part II: Microbial Interactions with Microplastics
4. Biofilm-Driven Microbial Colonization and Plastic Degradation: Insights into Quorum Sensing and Extremophilic Adaptations
Anjali, Parvesh Kumar, Kanti Prakash Sharma and Vidyullatha Peddireddy
Abbreviations
4.1 Introduction
4.2 Mechanisms of Biofilm Formation
4.2.1 Initial Attachment
4.2.2 Microcolony Formation
4.2.3 Maturation
4.2.4 Dispersal
4.3 Quorum Sensing in Biofilm Communication and Plastic Degradation
4.4 Enzymatic Mechanisms for Plastic Degradation
4.4.1 Polyethylene Terephthalate (PET)
4.4.2 Other Plastic Types and Enzymes
4.5 Biofilm-Mediated Microplastic Degradation
4.6 Extremophilic Microorganisms and Plastic Adaptation
4.7 Clinical vs. Environmental Biofilms: Adaptability Across Contexts
4.8 Enzymatic Mechanisms of Microplastic Degradation
4.8.1 Hydrolases
4.8.2 Oxidative Enzymes
4.8.3 Polyesterases
4.8.4 Synergy and Environmental Influence
4.9 Microbial Adaptations in Extreme Environments
4.9.1 Thermophiles: Heat-Resistant Strategists
4.9.2 Psychrophiles: Cold-Adapted Degraders
4.9.3 Acidophiles and Alkaliphiles: pH-Tolerant Biofilm Builders
4.9.4 Halophiles: Experts in Osmotic Stress
4.9.5 Piezophiles (Barophiles): Thriving Under Pressure
4.9.6 Radio-Tolerant Microbes: Enduring Ionizing Radiation
4.9.7 Oligotrophs: Surviving with Scarce Resources
4.10 Real-World Applications and Case Studies
4.10.1 Ideonella Sakaiensis and PET Biodegradation
4.10.2 Marine Plastisphere Microbiomes
4.10.3 Bioreactor Applications Using Pseudomonas spp.
4.10.4 Agricultural Soil Microbiomes
4.10.5 Antarctic Microbes in Cold Degradation
4.11 Future Perspectives
4.11.1 Synthetic Biology and Genetic Engineering
4.11.2 Omics-Guided Enzyme Discovery
4.11.3 Scaling through Bioreactor Innovation
4.11.4 Tuning Quorum Sensing
4.11.5 Coupling with Circular Economy Models
4.11.6 Environmental and Regulatory Considerations
4.12 Conclusion
References
5. Microbial Communities on Microplastics Highlights Microbial Diversity and Metabolic Role
Mehara Nijamudeen, Ritu Shepherd and Jesse Joel Thathapudi
5.1 Introduction
5.1.1 Minderoo-Monaco Commission
5.1.2 Global Concern and Relevance
5.2 Ecosystems Affected by Microplastic Contamination
5.2.1 Terrestrial Ecosystems (Soil and Agriculture)
5.2.2 Aquatic Ecosystems (Freshwater and Marine)
5.3 Types of Microplastics
5.3.1 Primary vs. Secondary Microplastics
5.4 Biofilm Formation on Microplastics (The Plastisphere)
5.4.1 Extracellular Polymeric Substances
5.4.2 Plastisphere
5.5 Microbial Enzymes Involved in Microplastic Degradation
5.5.1 Enzymes Involved in Plastic Degradation
5.6 Impact of Microplastics on Soil Properties and Agricultural Production
5.7 Case Studies
5.7.1 Impact of Polystyrene Nanoplastics on the Intestinal Morphology of Acrossocheilus Yunnanensis, a Cyprinid Fish
5.7.2 Bioaccumulation and Toxicity of Decabromodiphenyl Ethane (DBDPE) in Zebrafish
5.7.3 Microplastics in Commercial Marine Fish Species from the River Thames and River Stour, United Kingdom
5.8 Summary of Findings
Abbreviations
References
6. Microbial Architects: Colonization, Biofilms, and Their Role in Biodegradation
Yogesh Kumar, Parwez Ahmad and Mayank Bhushan
6.1 Introduction
6.2 Microbial Colonization
6.3 Biofilm
6.3.1 Initial Attachment
6.3.2 Bacterial Aggregation
6.3.3 Formation of Microcolony
6.3.4 Maturation of Biofilm
6.3.5 Dispersion
6.4 Quorum Sensing
6.5 Biofilm Architecture: Structural and Stabilizing Factors
6.6 Microbial Communities in the Plastisphere
6.7 Degradation by Biofilm: An Emerging Mechanism in Plastic Bioremediation
6.8 Conclusion
References
7. Microbial Colonization and Biofilm Formation on Microplastics
Lenin Kumar Bompalli and Lokeswari Nallabilli
7.1 Introduction
7.2 Microbial Colonization of Microplastics
7.3 Biofilm Formation Dynamics
7.3.1 Microplastic Characteristics
7.3.2 Environmental Conditions
7.3.3 Microbial Community Composition
7.4 Functional Implications of Biofilm Formation
7.5 Environmental and Ecological Impacts
7.6 Implications for Public Health
7.7 Cutting-Edge Degradation Techniques
7.8 Biological and Natural Solutions
7.9 Innovative Materials and Methods
7.10 Conclusion
Bibliography
8. The Plastisphere Paradigm: Biofilm-Microplastic Interactions and Microbial Community Dynamics in Natural Ecosystems
Sowmya Kumaravel
8.1 Introduction
8.2 Plastic Pollution by Microplastics
8.3 Plastisphere
8.3.1 Formation and Succession of Biofilms
8.4 Microbial Community Composition
8.4.1 Diatoms
8.4.2 Cyanobacteria
8.4.3 Proteobacteria
8.4.4 Bacteriodetes
8.4.5 Firmicutes
8.5 Aspects Influencing Plastisphere Formation
8.6 Ecological Effects of the Plastisphere
8.7 Conclusion
References
Part III: Microbial Solutions for Microplastic Remediation
9. Enzymatic Biodegradation of PET Plastics: PETase as a Key Catalyst in Microbial Remediation
Arpitha Balakrishnan, Jeena Gupta and Ashish Vyas
9.1 Introduction
9.2 Plastics and Their Environmental Impact
9.2.1 Types of Plastics
9.2.2 PET Overview and Impact on Environment
9.2.3 Microplastics: Formation and Environmental Impact
9.3 Degradation of Plastics in the Environment
9.3.1 Abiotic Plastic Degradation
9.3.2 Biodegradation of Plastics
9.3.3 PET-Degrading Biocatalysts
9.3.4 Plastic Degradation in Oceans and Biofouling
9.4 Discovery and Origin of PETase
9.4.1 General Features of I. Sakaiensis
9.4.2 PET Metabolism of I. Sakaiensis
9.5 Structure and Properties of PET-Degrading Enzymes by I. Sakaiensis
9.5.1 MHETase
9.5.2 PETase
9.5.3 Factors Affecting PETase Activity
9.5.4 Comparison of PETase and MHETase
9.6 Mechanism of PETase-Mediated PET Degradation
9.6.1 Substrate Binding
9.6.2 Nucleophilic Attack
9.6.3 Proton Transfer and Cleavage
9.6.4 Water Activation
9.6.5 Summary of the Proton Shuttle Mechanism
9.7 PETase Mutants and Engineering for Enhanced Activity
9.7.1 Limitations of Wild-Type PETase
9.7.2 Improving the Thermostability of PETase
9.8 Comparison with Other PET-Degrading Enzymes
9.9 Applications and Future Prospects
9.10 Conclusion
Bibliography
10. The Consortia-Based Bioremediation: Emerging Research and Future Prospects
Anamika Singh, Indira P. Sarethy and Ekta Bhatt
10.1 Introduction
10.2 Synthetic Microbial Communities and Its Designing Strategy
10.3 Construction Strategy of Synthetic Microbial Consortia for Degradation
10.4 Recent Advancements in the Field of Bioremediation Based on Microbial Consortia
10.4.1 Role of Genetic and Metabolic Engineering
10.4.2 Application of Systems Biology in the Field of Bioremediation
10.4.3 Synthetic Biology Computational Tools for Analysis
10.4.4 Application of Pathway Modeling in Systems Biology
10.4.5 Enzyme and Membrane Technology
10.4.6 Application of Metagenomics Approaches in Consortia-Based Bioremediation
10.4.7 Application of Nanotechnology in Bioremediation
10.5 Limitations in Various Fields
10.6 Future Directions
10.7 Conclusion
Bibliography
11. Microbial Enzymes Involved in Plastic Degradation
Bhumit Chavda and Yash Babaria
11.1 Introduction
11.2 Overview of Plastics and Their Environmental Persistence
11.2.1 Classification and Structure of Common Plastics
11.2.2 Physicochemical Properties Influencing Degradability
11.2.3 Environmental Impacts of Plastic Accumulation
11.2.3.1 Effects of Pollution: Multidimensional Perspective
11.3 Microbial Systems in Plastic Degradation
11.3.1 Bacterial and Fungal Degraders of Plastics
11.3.2 Natural Microbial Consortia vs. Isolated Strains
11.3.3 Microbial Colonization and Biofilm Formation on Plastics
11.4 Key Enzymes in Plastic Biodegradation
11.4.1 Polyethylene Terephthalate (PET) PETase and MHETase
11.4.2 Cutinases and Lipases
11.4.3 Peroxidases and Laccases
11.4.4 Hydroxylases and Monooxygenases of Alkanes
11.4.5 Supporting Enzymes Like Esterases, Urethanes, and Others
11.5 Enzyme-Mediated Mechanism of Plastic Decomposition
11.5.1 Hydrolysis and Surface Binding
11.5.2 Depolymerization Enzymatic Paths
11.5.3 Inhibitors and Activators of Enzyme Activity (pH, Temperature, and Co-Factors)
11.6 Investigative Procedures on a Plastic-Degrading Enzyme
11.6.1 Enzymatic Tests In Vitro
11.6.2 Chromatography and Spectrometry
11.6.3 Methods of Surface Analysis (SEM, FTIR, and DSC)
11.7 Applications
11.7.1 Degradation of Plastic in Bioreactor—Plastic Biotreatment in Soil and in the Ocean
11.7.2 Industrial and Waste Management Uses—Enzyme-Based Plastic Recycling Initiatives
11.8 Research and Future Prospects
11.9 Conclusion
References
12. Genetically Engineered Microorganisms for Microplastic Degradation
Bhumit Chavda, Rahilkumar Brahmbhatt, Akshara Yesodharan, Shivangi Parmar and Kapil Kumar
12.1 Introduction
12.1.1 Definition, Types, and Sources of Microplastics
12.1.2 Natural Microbial Degradation
12.1.3 Environmental Fate and Ecotoxicological Impact
12.2 Natural Microbial Degraders of Microplastics
12.2.1 Bacterial and Fungal Species with Degradation Potential
12.2.2 Enzymes Involved in Plastic Biodegradation (e.g., PETase and Cutinase)
12.2.3 Limitations of Native Microbial Strains
12.3 Genetic Engineering Strategies
12.3.1 Recombinant DNA Technology for Enhanced Plastic-Degrading Enzymes
12.3.2 Gene Editing (CRISPR-Cas Systems) in Microbial Optimization
12.3.3 Metabolic Pathway Engineering for Efficient Polymer Breakdown
12.3.4 Synthetic Biology for Microbial Consortia Design
12.4 Expression Systems and Host Optimization
12.4.1 Use of Model Hosts (E. Coli, Pseudomonas, and Bacillus)
12.4.2 Plasmid Vectors and Promoter Systems
12.4.3 Secretion Pathways for Enzyme Activity Enhancement
12.5 Biodegradation Mechanisms and Pathways
12.5.1 Enzymatic Hydrolysis of Microplastics
12.5.2 Metabolic Assimilation of Polymer Monomers
12.6 Challenges and Limitations
12.6.1 Genetic Instability and Mutation Risk
12.6.2 Containment and Biosafety Concerns
12.6.3 Enzyme Inefficiency and Substrate Complexity
12.6.4 Scale-Up and Environmental Heterogeneity
12.7 Technological Advances and Future Prospects
12.7.1 Integration of AI and Computational Biology
12.7.2 Omics and Systems Biology
12.8 Conclusion
References
Part IV: Challenges, Policies, and Future Perspectives
13. Challenges and Limitations of Microbial Biodegradation
Dharmistha Parmar, Aishwarya Varadiya and Bhumit Chavda
13.1 Introduction
13.1.1 Overview of Microbial Biodegradation
13.1.1.1 Historical Background and Importance
13.1.1.2 Importance of Microbial Biodegradation
13.2 Biological Foundations of Biodegradation
13.2.1 Microbial Diversity and Enzymatic Mechanisms
13.2.2 Metabolic Pathways and Genetic Regulation
13.2.2.1 Bacterial Metabolic Pathways and Regulation
13.2.2.2 Archaeal Metabolism and Regulation
13.2.2.3 Fungal Metabolic Pathways and Regulation
13.2.3 Types of Pollutants and Microbial Response
13.3 Major Challenges in Microbial Biodegradation
13.3.1 Low Bioavailability of Pollutants
13.3.2 Toxicity of Pollutants and Intermediate Compounds
13.3.3 Environmental Constraints: Temperature, pH, Oxygen, and Nutrients
13.3.4 Microbial Viability and Adaptation in Contaminated Sites
13.4 Limitation in Biodegradation Efficiency
13.4.1 Incomplete Degradation and Recalcitrant Compounds
13.4.2 Genetic Limitations and Strain Instability
13.4.3 Competition and Interference in Microbial Communities
13.5 Technological and Practical Barriers in Microbial Biodegradation
13.5.1 Integration into Industrial and Field Settings
13.5.2 Cost and Time Constraints in Application
13.6 Advances toward Overcoming Limitations
13.6.1 Metagenomics and Omics-Based Approaches
13.6.2 Nanotechnology and Carrier Systems
13.7 Ecological and Regulatory Considerations
13.7.1 Environmental Risk and Biosafety Concerns
13.7.2 Legal Framework and Standardization Issues
13.8 Conclusion and Future Directions
References
14. Toxicological and Systemic Health Effects of Microplastics in Humans: Mechanisms, Exposure, and Emerging Concerns
Elkhatim Hassan Abdelgadir and Sachil Kumar
14.1 Introduction
14.1.1 Objectives of This Chapter
14.1.2 Emergence of Microplastics (MPs)
14.1.3 Global Distribution and Environmental Persistence
14.1.4 Global Response to Plastic Pollution
14.1.5 Classification of Microplastics
14.1.5.1 Primary Microplastics
14.1.5.2 Secondary Microplastics
14.1.6 Microplastic Toxicity and Research Gaps
14.1.7 Human Exposure to Microplastics
14.1.7.1 Oral Intake
14.1.7.2 Inhalation
14.1.7.3 Dermal Contact
14.2 Toxic Effects of Microplastics
14.2.1 Factors Affecting the Toxicity of Microplastics
14.2.2 Toxic Effects in Human Organoid Experiments
14.2.3 Toxic Effects in Animal Experiments
14.2.3.1 Metabolic Disorders
14.2.3.2 Effects in Cell Experiments
14.2.3.3 Immune Response
14.2.3.4 Neurotoxicity
14.3 Effects of Micro-Plastics on Human Health
14.3.1 Organ System Toxicity
14.3.1.1 Digestive System
14.3.1.2 Respiratory System
14.3.1.3 Endocrine and Immune Systems
14.3.1.4 Neurological System
14.3.2 Endocrine and Reproductive Toxicity
14.3.2.1 Endocrine Interference and Hormonal Disruption
14.3.2.2 Reproductive System Effects
14.3.3 Molecular Mechanisms of Toxicity
14.3.3.1 Inflammation and Oxidative Stress
14.3.3.2 Apoptosis and Cell Death
14.3.3.3 Endocrine Disruption at the Molecular Level
14.3.3.4 Epigenetic Changes
14.3.3.5 Genotoxicity and DNA Damage
14.4 Conclusion
References
15. An Overview of Microplastics’ Impact on Health and the Environment
Ivan Aranha
15.1 Introduction
15.2 Microplastics in Terrestrial Ecosystems
15.3 Microplastics in Biological Systems
15.4 Microplastics and Human Health
15.5 Plastic Leachate Effects
15.6 India Leads in Plastic Pollution
15.7 Conclusions
References
16. Policy and Regulatory Frameworks for Microplastic Management
Naveen Kumar, Jyoti Kumari and Sugandha Aachhera
16.1 Introduction
16.1.1 Classification of Microplastics
16.1.2 Environmental and Health Implications
16.1.3 Rationale for Policy and Regulatory Measures
16.2 Global Policy Frameworks
16.2.1 International Conventions and Agreements
16.2.2 Contributions of Global Organizations
16.2.3 Regional Policy Differences and Harmonization Efforts
16.3 National Regulatory Approaches
16.3.1 Comparative Analysis of Microplastic Regulations
16.3.2 Case Studies of Effective National Strategies
16.3.3 Limitations and Regulatory Gaps
16.4 Stakeholder Collaboration
16.4.1 Industry Responsibilities
16.4.2 Public Education Initiatives
16.4.3 Multi-Stakeholder Partnerships
16.5 Regulatory Instruments and Strategies
16.5.1 Legislative Bans and Restrictions
16.5.2 Economic Tools
16.5.3 Monitoring and Compliance Mechanisms
16.6 Innovations and Future Directions
16.6.1 Advances in Detection and Removal
16.6.2 Circular Economy Integration
16.6.3 Emerging Trends and Opportunities
16.7 Challenges and Opportunities
16.7.1 Implementation and Enforcement Barriers
16.7.2 Socioeconomic Considerations
16.7.3 International Collaboration
16.8 Conclusions and Policy Recommendations
16.8.1 Synthesis of Key Insights
16.8.2 Policy Recommendations
16.8.3 Stakeholder Engagement Strategies
References
About the Editors
Index
Back to Top
List of Figures
List of Tables
List of Contributors
Foreword
Preface
Acknowledgements
Part I: Understanding Microplastics and Their Environmental Impact
1. Introduction to Microplastic Pollution
Harshita Jain and Maulin P. Shah
1.1 Introduction
1.2 Definition and Characteristics of Microplastics
1.3 Sources of Microplastics
1.3.1 Primary Sources
1.3.2 Secondary Sources
1.4 Classification of Microplastics
1.4.1 By Size and Shape
1.4.2 By Polymer Type
1.5 Environmental Pathways and Transport Mechanisms
1.6 Environmental Persistence and Degradation Resistance
1.7 Ecological and Human Health Implications
1.8 Microplastics as Vectors for Pollutants and Microorganisms
1.9 The Need for Interdisciplinary Approaches
1.10 Conclusion
References
2. Microplastics in Aquatic and Terrestrial Ecosystems
Kalpesh Solanki and Sagar Harwani
2.1 Introduction: The Ubiquitous Threat of Microplastic Pollution
2.2 Sources and Pathways of Microplastics into the Environment
2.2.1 Aquatic Ecosystems
2.2.1.1 Primary Microplastics
2.2.1.2 Secondary Microplastics
2.2.1.3 Specific Sources in Aquatic Environments
2.2.2 Terrestrial Ecosystems
2.2.2.1 Primary Microplastics in Terrestrial Settings
2.2.2.2 Secondary Microplastics in Terrestrial Settings
2.2.2.3 Specific Sources in Terrestrial Environments
2.3 Distribution and Abundance of Microplastics in Aquatic Ecosystems
2.3.1 Oceans
2.3.2 Freshwater Systems (Rivers, Lakes, and Streams)
2.3.3 Sediments
2.4 Distribution and Abundance of Microplastics in Terrestrial Ecosystems
2.4.1 Soils (Agricultural, Urban, and Forested)
2.4.2 Atmosphere
2.4.3 Organisms (Uptake by Terrestrial Biota)
2.5 Ecological Impacts in Aquatic Ecosystems
2.5.1 Ingestion and Physical Harm to Aquatic Organisms
2.5.2 Bioaccumulation of Pollutants and Transfer to Food Webs
2.5.3 Disruption of Ecological Processes
2.6 Ecological Impacts in Terrestrial Ecosystems
2.6.1 Impact on Soil Health and Properties
2.6.2 Effects on Terrestrial Biota (Microbes, Invertebrates, and Plants)
2.6.3 Potential for Trophic Transfer in Terrestrial Food Webs
2.7 Microplastics and Microorganisms: A Complex Interaction
2.7.1 Formation of the Plastisphere
2.7.2 Role of Microorganisms in Microplastic Degradation
2.7.3 Microplastics as Vectors for Other Pollutants and Pathogens
2.8 Trophic Transfer and Potential Biomagnification
2.8.1 Evidence in Aquatic Food Webs
2.8.2 Evidence in Terrestrial Food Webs
2.9 Dominant Types of Microplastics in Aquatic and Terrestrial Ecosystems
2.9.1 Aquatic Environments
2.9.2 Terrestrial Environments
2.10 Current Research Trends and Future Directions
2.11 Conclusion: Interconnected Ecosystems and the Imperative for Remediation
References
3. Health and Environmental Risks of Microplastics
Sagar Harwani and Kalpesh Solanki
3.1 Introduction
3.2 Detailed Analysis of Human Health Risks
3.2.1 Exposure Pathways and Associated Risks
3.2.1.1 Ingestion
3.2.1.2 Inhalation
3.2.1.3 Dermal Contact
3.2.2 Mechanisms of Toxicity
3.2.2.1 Physical Toxicity
3.2.2.2 Chemical Toxicity
3.2.2.3 Microbiological Toxicity
3.2.3 Specific Health Outcomes
3.2.3.1 Cardiovascular Effects
3.2.3.2 Respiratory Effects
3.2.3.3 Digestive Effects
3.2.3.4 Reproductive and Developmental Effects
3.2.3.5 Neurological Effects
3.2.3.6 Potential Links to Cancer
3.2.4 Risks for Vulnerable Populations
3.3 Comprehensive Examination of Environmental Risks
3.3.1 Ecological Disruption
3.3.2 Soil and Water Impacts
3.3.3 Vectors for Contaminants
3.3.4 Long-Term and Dose-Dependent Effects
3.4 The Nexus of Health and Environment
3.5 Current Knowledge Landscape and Research Directions
3.6 Mitigation Strategies and Recommendations
3.7 Conclusion
References
Part II: Microbial Interactions with Microplastics
4. Biofilm-Driven Microbial Colonization and Plastic Degradation: Insights into Quorum Sensing and Extremophilic Adaptations
Anjali, Parvesh Kumar, Kanti Prakash Sharma and Vidyullatha Peddireddy
Abbreviations
4.1 Introduction
4.2 Mechanisms of Biofilm Formation
4.2.1 Initial Attachment
4.2.2 Microcolony Formation
4.2.3 Maturation
4.2.4 Dispersal
4.3 Quorum Sensing in Biofilm Communication and Plastic Degradation
4.4 Enzymatic Mechanisms for Plastic Degradation
4.4.1 Polyethylene Terephthalate (PET)
4.4.2 Other Plastic Types and Enzymes
4.5 Biofilm-Mediated Microplastic Degradation
4.6 Extremophilic Microorganisms and Plastic Adaptation
4.7 Clinical vs. Environmental Biofilms: Adaptability Across Contexts
4.8 Enzymatic Mechanisms of Microplastic Degradation
4.8.1 Hydrolases
4.8.2 Oxidative Enzymes
4.8.3 Polyesterases
4.8.4 Synergy and Environmental Influence
4.9 Microbial Adaptations in Extreme Environments
4.9.1 Thermophiles: Heat-Resistant Strategists
4.9.2 Psychrophiles: Cold-Adapted Degraders
4.9.3 Acidophiles and Alkaliphiles: pH-Tolerant Biofilm Builders
4.9.4 Halophiles: Experts in Osmotic Stress
4.9.5 Piezophiles (Barophiles): Thriving Under Pressure
4.9.6 Radio-Tolerant Microbes: Enduring Ionizing Radiation
4.9.7 Oligotrophs: Surviving with Scarce Resources
4.10 Real-World Applications and Case Studies
4.10.1 Ideonella Sakaiensis and PET Biodegradation
4.10.2 Marine Plastisphere Microbiomes
4.10.3 Bioreactor Applications Using Pseudomonas spp.
4.10.4 Agricultural Soil Microbiomes
4.10.5 Antarctic Microbes in Cold Degradation
4.11 Future Perspectives
4.11.1 Synthetic Biology and Genetic Engineering
4.11.2 Omics-Guided Enzyme Discovery
4.11.3 Scaling through Bioreactor Innovation
4.11.4 Tuning Quorum Sensing
4.11.5 Coupling with Circular Economy Models
4.11.6 Environmental and Regulatory Considerations
4.12 Conclusion
References
5. Microbial Communities on Microplastics Highlights Microbial Diversity and Metabolic Role
Mehara Nijamudeen, Ritu Shepherd and Jesse Joel Thathapudi
5.1 Introduction
5.1.1 Minderoo-Monaco Commission
5.1.2 Global Concern and Relevance
5.2 Ecosystems Affected by Microplastic Contamination
5.2.1 Terrestrial Ecosystems (Soil and Agriculture)
5.2.2 Aquatic Ecosystems (Freshwater and Marine)
5.3 Types of Microplastics
5.3.1 Primary vs. Secondary Microplastics
5.4 Biofilm Formation on Microplastics (The Plastisphere)
5.4.1 Extracellular Polymeric Substances
5.4.2 Plastisphere
5.5 Microbial Enzymes Involved in Microplastic Degradation
5.5.1 Enzymes Involved in Plastic Degradation
5.6 Impact of Microplastics on Soil Properties and Agricultural Production
5.7 Case Studies
5.7.1 Impact of Polystyrene Nanoplastics on the Intestinal Morphology of Acrossocheilus Yunnanensis, a Cyprinid Fish
5.7.2 Bioaccumulation and Toxicity of Decabromodiphenyl Ethane (DBDPE) in Zebrafish
5.7.3 Microplastics in Commercial Marine Fish Species from the River Thames and River Stour, United Kingdom
5.8 Summary of Findings
Abbreviations
References
6. Microbial Architects: Colonization, Biofilms, and Their Role in Biodegradation
Yogesh Kumar, Parwez Ahmad and Mayank Bhushan
6.1 Introduction
6.2 Microbial Colonization
6.3 Biofilm
6.3.1 Initial Attachment
6.3.2 Bacterial Aggregation
6.3.3 Formation of Microcolony
6.3.4 Maturation of Biofilm
6.3.5 Dispersion
6.4 Quorum Sensing
6.5 Biofilm Architecture: Structural and Stabilizing Factors
6.6 Microbial Communities in the Plastisphere
6.7 Degradation by Biofilm: An Emerging Mechanism in Plastic Bioremediation
6.8 Conclusion
References
7. Microbial Colonization and Biofilm Formation on Microplastics
Lenin Kumar Bompalli and Lokeswari Nallabilli
7.1 Introduction
7.2 Microbial Colonization of Microplastics
7.3 Biofilm Formation Dynamics
7.3.1 Microplastic Characteristics
7.3.2 Environmental Conditions
7.3.3 Microbial Community Composition
7.4 Functional Implications of Biofilm Formation
7.5 Environmental and Ecological Impacts
7.6 Implications for Public Health
7.7 Cutting-Edge Degradation Techniques
7.8 Biological and Natural Solutions
7.9 Innovative Materials and Methods
7.10 Conclusion
Bibliography
8. The Plastisphere Paradigm: Biofilm-Microplastic Interactions and Microbial Community Dynamics in Natural Ecosystems
Sowmya Kumaravel
8.1 Introduction
8.2 Plastic Pollution by Microplastics
8.3 Plastisphere
8.3.1 Formation and Succession of Biofilms
8.4 Microbial Community Composition
8.4.1 Diatoms
8.4.2 Cyanobacteria
8.4.3 Proteobacteria
8.4.4 Bacteriodetes
8.4.5 Firmicutes
8.5 Aspects Influencing Plastisphere Formation
8.6 Ecological Effects of the Plastisphere
8.7 Conclusion
References
Part III: Microbial Solutions for Microplastic Remediation
9. Enzymatic Biodegradation of PET Plastics: PETase as a Key Catalyst in Microbial Remediation
Arpitha Balakrishnan, Jeena Gupta and Ashish Vyas
9.1 Introduction
9.2 Plastics and Their Environmental Impact
9.2.1 Types of Plastics
9.2.2 PET Overview and Impact on Environment
9.2.3 Microplastics: Formation and Environmental Impact
9.3 Degradation of Plastics in the Environment
9.3.1 Abiotic Plastic Degradation
9.3.2 Biodegradation of Plastics
9.3.3 PET-Degrading Biocatalysts
9.3.4 Plastic Degradation in Oceans and Biofouling
9.4 Discovery and Origin of PETase
9.4.1 General Features of I. Sakaiensis
9.4.2 PET Metabolism of I. Sakaiensis
9.5 Structure and Properties of PET-Degrading Enzymes by I. Sakaiensis
9.5.1 MHETase
9.5.2 PETase
9.5.3 Factors Affecting PETase Activity
9.5.4 Comparison of PETase and MHETase
9.6 Mechanism of PETase-Mediated PET Degradation
9.6.1 Substrate Binding
9.6.2 Nucleophilic Attack
9.6.3 Proton Transfer and Cleavage
9.6.4 Water Activation
9.6.5 Summary of the Proton Shuttle Mechanism
9.7 PETase Mutants and Engineering for Enhanced Activity
9.7.1 Limitations of Wild-Type PETase
9.7.2 Improving the Thermostability of PETase
9.8 Comparison with Other PET-Degrading Enzymes
9.9 Applications and Future Prospects
9.10 Conclusion
Bibliography
10. The Consortia-Based Bioremediation: Emerging Research and Future Prospects
Anamika Singh, Indira P. Sarethy and Ekta Bhatt
10.1 Introduction
10.2 Synthetic Microbial Communities and Its Designing Strategy
10.3 Construction Strategy of Synthetic Microbial Consortia for Degradation
10.4 Recent Advancements in the Field of Bioremediation Based on Microbial Consortia
10.4.1 Role of Genetic and Metabolic Engineering
10.4.2 Application of Systems Biology in the Field of Bioremediation
10.4.3 Synthetic Biology Computational Tools for Analysis
10.4.4 Application of Pathway Modeling in Systems Biology
10.4.5 Enzyme and Membrane Technology
10.4.6 Application of Metagenomics Approaches in Consortia-Based Bioremediation
10.4.7 Application of Nanotechnology in Bioremediation
10.5 Limitations in Various Fields
10.6 Future Directions
10.7 Conclusion
Bibliography
11. Microbial Enzymes Involved in Plastic Degradation
Bhumit Chavda and Yash Babaria
11.1 Introduction
11.2 Overview of Plastics and Their Environmental Persistence
11.2.1 Classification and Structure of Common Plastics
11.2.2 Physicochemical Properties Influencing Degradability
11.2.3 Environmental Impacts of Plastic Accumulation
11.2.3.1 Effects of Pollution: Multidimensional Perspective
11.3 Microbial Systems in Plastic Degradation
11.3.1 Bacterial and Fungal Degraders of Plastics
11.3.2 Natural Microbial Consortia vs. Isolated Strains
11.3.3 Microbial Colonization and Biofilm Formation on Plastics
11.4 Key Enzymes in Plastic Biodegradation
11.4.1 Polyethylene Terephthalate (PET) PETase and MHETase
11.4.2 Cutinases and Lipases
11.4.3 Peroxidases and Laccases
11.4.4 Hydroxylases and Monooxygenases of Alkanes
11.4.5 Supporting Enzymes Like Esterases, Urethanes, and Others
11.5 Enzyme-Mediated Mechanism of Plastic Decomposition
11.5.1 Hydrolysis and Surface Binding
11.5.2 Depolymerization Enzymatic Paths
11.5.3 Inhibitors and Activators of Enzyme Activity (pH, Temperature, and Co-Factors)
11.6 Investigative Procedures on a Plastic-Degrading Enzyme
11.6.1 Enzymatic Tests In Vitro
11.6.2 Chromatography and Spectrometry
11.6.3 Methods of Surface Analysis (SEM, FTIR, and DSC)
11.7 Applications
11.7.1 Degradation of Plastic in Bioreactor—Plastic Biotreatment in Soil and in the Ocean
11.7.2 Industrial and Waste Management Uses—Enzyme-Based Plastic Recycling Initiatives
11.8 Research and Future Prospects
11.9 Conclusion
References
12. Genetically Engineered Microorganisms for Microplastic Degradation
Bhumit Chavda, Rahilkumar Brahmbhatt, Akshara Yesodharan, Shivangi Parmar and Kapil Kumar
12.1 Introduction
12.1.1 Definition, Types, and Sources of Microplastics
12.1.2 Natural Microbial Degradation
12.1.3 Environmental Fate and Ecotoxicological Impact
12.2 Natural Microbial Degraders of Microplastics
12.2.1 Bacterial and Fungal Species with Degradation Potential
12.2.2 Enzymes Involved in Plastic Biodegradation (e.g., PETase and Cutinase)
12.2.3 Limitations of Native Microbial Strains
12.3 Genetic Engineering Strategies
12.3.1 Recombinant DNA Technology for Enhanced Plastic-Degrading Enzymes
12.3.2 Gene Editing (CRISPR-Cas Systems) in Microbial Optimization
12.3.3 Metabolic Pathway Engineering for Efficient Polymer Breakdown
12.3.4 Synthetic Biology for Microbial Consortia Design
12.4 Expression Systems and Host Optimization
12.4.1 Use of Model Hosts (E. Coli, Pseudomonas, and Bacillus)
12.4.2 Plasmid Vectors and Promoter Systems
12.4.3 Secretion Pathways for Enzyme Activity Enhancement
12.5 Biodegradation Mechanisms and Pathways
12.5.1 Enzymatic Hydrolysis of Microplastics
12.5.2 Metabolic Assimilation of Polymer Monomers
12.6 Challenges and Limitations
12.6.1 Genetic Instability and Mutation Risk
12.6.2 Containment and Biosafety Concerns
12.6.3 Enzyme Inefficiency and Substrate Complexity
12.6.4 Scale-Up and Environmental Heterogeneity
12.7 Technological Advances and Future Prospects
12.7.1 Integration of AI and Computational Biology
12.7.2 Omics and Systems Biology
12.8 Conclusion
References
Part IV: Challenges, Policies, and Future Perspectives
13. Challenges and Limitations of Microbial Biodegradation
Dharmistha Parmar, Aishwarya Varadiya and Bhumit Chavda
13.1 Introduction
13.1.1 Overview of Microbial Biodegradation
13.1.1.1 Historical Background and Importance
13.1.1.2 Importance of Microbial Biodegradation
13.2 Biological Foundations of Biodegradation
13.2.1 Microbial Diversity and Enzymatic Mechanisms
13.2.2 Metabolic Pathways and Genetic Regulation
13.2.2.1 Bacterial Metabolic Pathways and Regulation
13.2.2.2 Archaeal Metabolism and Regulation
13.2.2.3 Fungal Metabolic Pathways and Regulation
13.2.3 Types of Pollutants and Microbial Response
13.3 Major Challenges in Microbial Biodegradation
13.3.1 Low Bioavailability of Pollutants
13.3.2 Toxicity of Pollutants and Intermediate Compounds
13.3.3 Environmental Constraints: Temperature, pH, Oxygen, and Nutrients
13.3.4 Microbial Viability and Adaptation in Contaminated Sites
13.4 Limitation in Biodegradation Efficiency
13.4.1 Incomplete Degradation and Recalcitrant Compounds
13.4.2 Genetic Limitations and Strain Instability
13.4.3 Competition and Interference in Microbial Communities
13.5 Technological and Practical Barriers in Microbial Biodegradation
13.5.1 Integration into Industrial and Field Settings
13.5.2 Cost and Time Constraints in Application
13.6 Advances toward Overcoming Limitations
13.6.1 Metagenomics and Omics-Based Approaches
13.6.2 Nanotechnology and Carrier Systems
13.7 Ecological and Regulatory Considerations
13.7.1 Environmental Risk and Biosafety Concerns
13.7.2 Legal Framework and Standardization Issues
13.8 Conclusion and Future Directions
References
14. Toxicological and Systemic Health Effects of Microplastics in Humans: Mechanisms, Exposure, and Emerging Concerns
Elkhatim Hassan Abdelgadir and Sachil Kumar
14.1 Introduction
14.1.1 Objectives of This Chapter
14.1.2 Emergence of Microplastics (MPs)
14.1.3 Global Distribution and Environmental Persistence
14.1.4 Global Response to Plastic Pollution
14.1.5 Classification of Microplastics
14.1.5.1 Primary Microplastics
14.1.5.2 Secondary Microplastics
14.1.6 Microplastic Toxicity and Research Gaps
14.1.7 Human Exposure to Microplastics
14.1.7.1 Oral Intake
14.1.7.2 Inhalation
14.1.7.3 Dermal Contact
14.2 Toxic Effects of Microplastics
14.2.1 Factors Affecting the Toxicity of Microplastics
14.2.2 Toxic Effects in Human Organoid Experiments
14.2.3 Toxic Effects in Animal Experiments
14.2.3.1 Metabolic Disorders
14.2.3.2 Effects in Cell Experiments
14.2.3.3 Immune Response
14.2.3.4 Neurotoxicity
14.3 Effects of Micro-Plastics on Human Health
14.3.1 Organ System Toxicity
14.3.1.1 Digestive System
14.3.1.2 Respiratory System
14.3.1.3 Endocrine and Immune Systems
14.3.1.4 Neurological System
14.3.2 Endocrine and Reproductive Toxicity
14.3.2.1 Endocrine Interference and Hormonal Disruption
14.3.2.2 Reproductive System Effects
14.3.3 Molecular Mechanisms of Toxicity
14.3.3.1 Inflammation and Oxidative Stress
14.3.3.2 Apoptosis and Cell Death
14.3.3.3 Endocrine Disruption at the Molecular Level
14.3.3.4 Epigenetic Changes
14.3.3.5 Genotoxicity and DNA Damage
14.4 Conclusion
References
15. An Overview of Microplastics’ Impact on Health and the Environment
Ivan Aranha
15.1 Introduction
15.2 Microplastics in Terrestrial Ecosystems
15.3 Microplastics in Biological Systems
15.4 Microplastics and Human Health
15.5 Plastic Leachate Effects
15.6 India Leads in Plastic Pollution
15.7 Conclusions
References
16. Policy and Regulatory Frameworks for Microplastic Management
Naveen Kumar, Jyoti Kumari and Sugandha Aachhera
16.1 Introduction
16.1.1 Classification of Microplastics
16.1.2 Environmental and Health Implications
16.1.3 Rationale for Policy and Regulatory Measures
16.2 Global Policy Frameworks
16.2.1 International Conventions and Agreements
16.2.2 Contributions of Global Organizations
16.2.3 Regional Policy Differences and Harmonization Efforts
16.3 National Regulatory Approaches
16.3.1 Comparative Analysis of Microplastic Regulations
16.3.2 Case Studies of Effective National Strategies
16.3.3 Limitations and Regulatory Gaps
16.4 Stakeholder Collaboration
16.4.1 Industry Responsibilities
16.4.2 Public Education Initiatives
16.4.3 Multi-Stakeholder Partnerships
16.5 Regulatory Instruments and Strategies
16.5.1 Legislative Bans and Restrictions
16.5.2 Economic Tools
16.5.3 Monitoring and Compliance Mechanisms
16.6 Innovations and Future Directions
16.6.1 Advances in Detection and Removal
16.6.2 Circular Economy Integration
16.6.3 Emerging Trends and Opportunities
16.7 Challenges and Opportunities
16.7.1 Implementation and Enforcement Barriers
16.7.2 Socioeconomic Considerations
16.7.3 International Collaboration
16.8 Conclusions and Policy Recommendations
16.8.1 Synthesis of Key Insights
16.8.2 Policy Recommendations
16.8.3 Stakeholder Engagement Strategies
References
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