This book shows a typical selection of the types of adsorbents studied and used in wastewater treatment, with emphasis on industrial effluents. The types of materials considered range from conventional sorbents such as carbons and silicas, to non-conventional solids such as sawdust and chitosan. Sorbents for specific applications (e.g. colour removal, metal extraction, fluoride removal) and new polymeric-based sorbents (calixarenes, molecularly imprinted polymers, cyclodextrins) are discussed in detail. For people who are new to the field, two special overview chapters, dealing with the principles and properties of adsorption processes, are provided at the beginning of the book. Also, the book provides a detailed review of sorption features.