This book provides comprehensive description of polymeric membranes in water treatment and remediation. It describes both the sustainability challenges and new opportunities to use membranes for water decontamination. It also discusses the environmental-related issues, challenges and advantages of using membrane-based systems and provides comprehensive description of various polymeric membranes, nanomaterials, biomolecules and their integrated systems for wastewater treatment. Various topics covered in this book are direct pressure-driven and osmotic-driven membrane processes, hybrid membrane processes (such as membrane bioreactors and integrating membrane separation with other processes), and resource recovery-oriented membrane-based processes. The book will be useful for students, researchers and professionals working in the area of materials science and environmental chemistry.