The book is made up of about ten (10) chapters that will particularly focus on advanced research in the use of timely and useful innovative techniques in the synthesis of novel magnetic biosorbents using facile synthesis methods, their characterization, and extensive applications of the synthesized magnetic biosorbents in the bioremediation and decontamination of different contaminants. The application of magnetic sorbents in seed germination and their use to improve photovoltaic performance are also captured in this book. Also, the challenges and perspectives of magnetic biosorbents for environmental sustainability applications are discussed.