This book explores the innovative use of marine-derived materials-such as biopolymers, nanomaterials, and hybrid composites-for advanced environmental remediation. It uniquely integrates bioengineering, nanotechnology, and AI-driven methods to address water pollution, microplastic degradation, and industrial wastewater treatment. Unlike existing works, it emphasizes scalable, eco-friendly solutions with real-world industrial applications. Combining scientific depth with practical case studies, this book serves as a vital resource for researchers, engineers, and professionals seeking sustainable, technology-driven approaches to environmental challenges.