Ravindra Kumar Gautam is a Raja Jwala Prasad postdoctoral fellow in the Department of Chemistry at BHU Varanasi, India. He has authored and co-authored 52 research and review papers, 22 book chapters, and three books. He is a Fellow of the Indian Chemical Society and has been a Life Member of the Indian Science Congress Association since 2013. He also serves as a reviewer for more than 30 journals. His areas of interest include electrochemical sensors, heavy metal pollution, adsorption of nanomaterials, and their analogues for water and wastewater remediation.Subhash Chandra is an Assistant Professor in the Department of Chemistry at B.S.N.V. (KKV) P.G. College, Lucknow, India. He received his PhD from IIT BHU Varanasi, and his research interests include environmental nanotechnology and sensors for biomedical and environmental applications. He has published more than 18 peer-reviewed research articles and four book chapters. He has been awarded by different organizations.Radha Rani is an Associate Professor in the Department of Biotechnology at Motilal Nehru National Institute of Technology, Prayagraj, India. She has a PhD in Microbiology from CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur India, and has been teaching for over 15 years. Dr. Radha has published 30 research papers, 10 book chapters, and has edited five conference proceedings. She is also actively involved as a reviewer of more than 20 journals.

• 1. Heavy Metals in the Aquatic Ecosystem: Sources, Transport, Toxicity Mechanism, and Mitigation Strategies. 2. Source of Heavy Metals in the Ecosystem. 3. Sources, Fate and Transport of Heavy Metals in the Ecosystem. 4. Heavy Metal Contaminants in Groundwater and Its Impact on Biodiversity. 5. Environmental Factors Affecting Toxicity of Heavy Metals. 6. Accumulation of Heavy Metals in Aquatic Ecosystem. 7. Heavy Metals Effect on Photosynthesis in Plants. 8. Heavy Metal Effect on Physiological Processes, Photosynthesis, and Plant Metabolism. 9. Mercury Pollution of Ponds, Rivers, and Lakes. 10. Mercury Toxicity: Impacts on Ecosystems and Mitigation Strategies. 11. Toxic Effects of Arsenic on Human Health and the Cellular Uptake Mechanism. 12. Arsenic Exposure on the Organ System of Human Being and its Toxic Effects on Health. 13. Toxic Effects of Arsenic on Plants and their Mechanism of Action. 14. Toxic Effects of Arsenic on C3 and C4 Plants in the Crop Ecosystem. 15. A Comprehensive Review of Occurrences, Causes, and Health Effects of Arsenic in Groundwater in India. 16. Toxicity of Arsenic in Edible Crops. 17. Mitigating Heavy Metals Toxicity: Sources, Pathways and the Ecological Impact. 18. Chromium (VI) Contamination and its Microbial Remediation in Saline Environment.

Ravindra Kumar Gautam is a Raja Jwala Prasad postdoctoral fellow in the Department of Chemistry at BHU Varanasi, India. He has authored and co-authored 52 research and review papers, 22 book chapters, and three books. He is a Fellow of the Indian Chemical Society and has been a Life Member of the Indian Science Congress Association since 2013. He also serves as a reviewer for more than 30 journals. His areas of interest include electrochemical sensors, heavy metal pollution, adsorption of nanomaterials, and their analogues for water and wastewater remediation.Subhash Chandra is an Assistant Professor in the Department of Chemistry at B.S.N.V. (KKV) P.G. College, Lucknow, India. He received his PhD from IIT BHU Varanasi, and his research interests include environmental nanotechnology and sensors for biomedical and environmental applications. He has published more than 18 peer-reviewed research articles and four book chapters. He has been awarded by different organizations.Radha Rani is an Associate Professor in the Department of Biotechnology at Motilal Nehru National Institute of Technology, Prayagraj, India. She has a PhD in Microbiology from CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur India, and has been teaching for over 15 years. Dr. Radha has published 30 research papers, 10 book chapters, and has edited five conference proceedings. She is also actively involved as a reviewer of more than 20 journals.

• 1. Heavy Metals in the Aquatic Ecosystem: Sources, Transport, Toxicity Mechanism, and Mitigation Strategies. 2. Source of Heavy Metals in the Ecosystem. 3. Sources, Fate and Transport of Heavy Metals in the Ecosystem. 4. Heavy Metal Contaminants in Groundwater and Its Impact on Biodiversity. 5. Environmental Factors Affecting Toxicity of Heavy Metals. 6. Accumulation of Heavy Metals in Aquatic Ecosystem. 7. Heavy Metals Effect on Photosynthesis in Plants. 8. Heavy Metal Effect on Physiological Processes, Photosynthesis, and Plant Metabolism. 9. Mercury Pollution of Ponds, Rivers, and Lakes. 10. Mercury Toxicity: Impacts on Ecosystems and Mitigation Strategies. 11. Toxic Effects of Arsenic on Human Health and the Cellular Uptake Mechanism. 12. Arsenic Exposure on the Organ System of Human Being and its Toxic Effects on Health. 13. Toxic Effects of Arsenic on Plants and their Mechanism of Action. 14. Toxic Effects of Arsenic on C3 and C4 Plants in the Crop Ecosystem. 15. A Comprehensive Review of Occurrences, Causes, and Health Effects of Arsenic in Groundwater in India. 16. Toxicity of Arsenic in Edible Crops. 17. Mitigating Heavy Metals Toxicity: Sources, Pathways and the Ecological Impact. 18. Chromium (VI) Contamination and its Microbial Remediation in Saline Environment.

Ravindra Kumar Gautam is a Raja Jwala Prasad postdoctoral fellow in the Department of Chemistry at BHU Varanasi, India. He has authored and co-authored 52 research and review papers, 22 book chapters, and three books. He is a Fellow of the Indian Chemical Society and has been a Life Member of the Indian Science Congress Association since 2013. He also serves as a reviewer for more than 30 journals. His areas of interest include electrochemical sensors, heavy metal pollution, adsorption of nanomaterials, and their analogues for water and wastewater remediation.Subhash Chandra is an Assistant Professor in the Department of Chemistry at B.S.N.V. (KKV) P.G. College, Lucknow, India. He received his PhD from IIT BHU Varanasi, and his research interests include environmental nanotechnology and sensors for biomedical and environmental applications. He has published more than 18 peer-reviewed research articles and four book chapters. He has been awarded by different organizations.Radha Rani is an Associate Professor in the Department of Biotechnology at Motilal Nehru National Institute of Technology, Prayagraj, India. She has a PhD in Microbiology from CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur India, and has been teaching for over 15 years. Dr. Radha has published 30 research papers, 10 book chapters, and has edited five conference proceedings. She is also actively involved as a reviewer of more than 20 journals.

• 1. Heavy Metals in the Aquatic Ecosystem: Sources, Transport, Toxicity Mechanism, and Mitigation Strategies. 2. Source of Heavy Metals in the Ecosystem. 3. Sources, Fate and Transport of Heavy Metals in the Ecosystem. 4. Heavy Metal Contaminants in Groundwater and Its Impact on Biodiversity. 5. Environmental Factors Affecting Toxicity of Heavy Metals. 6. Accumulation of Heavy Metals in Aquatic Ecosystem. 7. Heavy Metals Effect on Photosynthesis in Plants. 8. Heavy Metal Effect on Physiological Processes, Photosynthesis, and Plant Metabolism. 9. Mercury Pollution of Ponds, Rivers, and Lakes. 10. Mercury Toxicity: Impacts on Ecosystems and Mitigation Strategies. 11. Toxic Effects of Arsenic on Human Health and the Cellular Uptake Mechanism. 12. Arsenic Exposure on the Organ System of Human Being and its Toxic Effects on Health. 13. Toxic Effects of Arsenic on Plants and their Mechanism of Action. 14. Toxic Effects of Arsenic on C3 and C4 Plants in the Crop Ecosystem. 15. A Comprehensive Review of Occurrences, Causes, and Health Effects of Arsenic in Groundwater in India. 16. Toxicity of Arsenic in Edible Crops. 17. Mitigating Heavy Metals Toxicity: Sources, Pathways and the Ecological Impact. 18. Chromium (VI) Contamination and its Microbial Remediation in Saline Environment.