Removal of heavy metal ions from water and wastewater has became more important due rapid industrialization. However among all the conventional methods application of adsorption for heavy metal removal gained more importance. However application of activated carbon as adsorbent became more popular, however due to cost effectiveness its application been limited. Low-cost adsorbents from agricultural bio waste were observed as novel materials for metal removal. This book includes application of agro-biomass as adsorbent for metal removal. The book consists of brief introduction of water pollution and methods for removal of metal ions and adsorption mechanism. Also several empirical models have been adopted to analyze the equilibrium data. Kinetics and isotherm have been studied. This book is very useful for scientists, engineers and researcher who are working in the areas of adsorption and biosorption.