This book examines the treatability of hazardous wastes by different physicochemical treatment processes according to the Quantitative Structure and Activity Relationship (QSAR) between kinetic rate constants and molecular descriptors. The author explores how to use these models to select treatment processes according to the molecular structure of organic pollutants. He covers how to use them to predict treatability of organic pollutants having similar molecular structures by each treatment process in both homogeneous and heterogeneous media. The book is a guide for assessing the treatability of pollutants prior to designing a treatment process and a reference on advanced oxidation processes.