Dr. Meththika Vithanage is a Professor in the Department of Geochemistry at the Geological Survey of Denmark and Greenland, Denmark. Her work centers on quantifying concentrations and reaction kinetics of key and emerging pollutants, including microplastics, and Persistent, Mobile and Toxic contaminants. She advances understanding of their environmental fate and transport and develops remediation strategies using innovative geo-, bio-, and nanomaterials.Dr. Dimitrios A. Giannakoudakis obtained his PhD at the City University of New York, New York City, United States (February 2017). Nowadays, he serves as an assistant professor at the University Marie Curie Sklodowska (UMCS), Lublin, Poland. His research is focused on the development of composite porous nanomaterials for (photo)(sono)(piezo)catalytic technologies for biomass valorization and (micro)plastics upcycling to green chemicals, as well as for air and water purification, linking physicochemical properties to performance and involved mechanisms. He coauthored more than 140 articles, 1 monograph, 7 edited books, and 17 book chapters with over 7000 citations. Since 2021, he has been included in the Top 2% Most Influential Scientists worldwide (Stanford list, Elsevier).Prof. Jagpreet Singh is Assistant Director at the Research & Incubation Center, Rayat Bahra University, India. His research focuses on the valorization of waste into advanced functional nanomaterials for environmental remediation applications, promoting sustainability, circular economy principles, and alignment with the UN Sustainable Development Goals (SDGs). He has published numerous articles on high impact journals, and was recognized among the World’s Top 2% Scientists by Stanford University and Elsevier for four consecutive years (2021–2024).

• Section 1: Overview (Introduction)1. Natural Nanoclays2. Synthetic Nanoclays: Synthesis and Physico-chemical characterization3. Processing and upscaling of nanoclay for industrial level applications: Existing technology, challenges and future4. Computational methods: a tool for nanoclay investigation at molecular level5. Green synthesis of nanoclaysSection 2: Nanoclays in treating organic pollutants in water and wastewater6. Remediating POPs using nanoclays7. Application of nanoclays in water treatment for PPCPs8. Nanoclays for the removal of PFAS in wastewater and groundwater9. Organic dye removal using green nanoclays: challenges in real scale10. Nanoclay application in removing agrochemical residue in waterSection 3: Nanoclays in removing inorganic pollutants in water and wastewater11. Defluoridation with nanoclays12. Nanoclays for the removal of macronutrients in water: Challenges and future13. Surface interactions of nanoclays with metalloids14. Challenges and opportunities of nanoclay application for the removal of hexavalent Cr15. Potentially toxic elements and nanoclay interactions: Possibilities for upscaling water treatmentSection 4: Nanoclay composites for water and wastewater treatment16. Surface modification of nanoclay with organics17. Intercalation of biochar with nanoclay: Properties and characteristics18. Green nanoclay composites for removal of Ions from water19. Sustainable applications of nanoclay composites20. Natural bio-polimer nanoclay composites for water treatmentSection 5: Case studies21. Adsorption of Phenol from Wastewater Using Calcined Magnesium-Zinc-Aluminium Layered Double Hydroxide nanoclay 22. Oil/water separation from nanoclay composites23. Antimicrobial Applications of Clay Nanotube-Based Composites