Water of high quality is essential to human life and water of acceptable quality is essential for agriculture, industrial, domestic and commercial uses. The discharge of dye wastewaters into natural streams and rivers from the textile industry poses severe problems. Restoring water quality to its original states could be expensive. Adsorption has been found to be superior to other treatment methods for water re-use in terms of flexibility of design and ease of operation. On the environment and economic side, the selection of the best adsorbent is a key issue that receives large attention. This book provides an interesting contribution to the water treatment process by adding current less explored knowledge of adsorption. The technical feasibility of various adsorbents for dyes removal from contaminated water has been reviewed. Instead of using commercial activated carbon, the author of this book has worked on industrial waste material. In this book, locally available mangrove bark was studied for its potential use as an adsorbent for the removal of different types of dyes from aqueous solution. Factor affecting the efficiency of dyes removal were evaluated.