Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. I. Adsorption processes are commonly employed in industrial environment for both compound separation and wastewater treatment. Adsorption is widely used in drinking water treatment to remove organic substances, in tertiary wastewater treatment, and in groundwater remediation. The use of combined processes has been suggested recently to overcome the disadvantage of individual unit processes. (Pan et al., 2009; Zhao et al., 2011). wastewater discharge 1. that the adsorbents used in the adsorption technique can be used repeatedly after some of the applied processes. There is no single process capable of adequate treatment mainly due to the complex nature of textile effluents. TERTIARY TREATMENT (oxidation, membrane filtration…) (step 4) Physical-chemical methods Biological treatment 3. SECONDARY TREATMENT (biodegradation, filtration, adsorption…) step 3 2. This chapter addresses the wastewater treatment of mining residues through adsorption methodologies. The most widely used adsorbent is commercially available activated carbon. The advanced treatment techniques include advanced oxidation processes (photolysis, ozonation, and catalytic/UV light-based degradation), membrane filtration, reverse osmosis, and adsorption techniques. This technology is characterized by many attractive features, including cost effectiveness, ease of design and operation, and resistance to toxic substances. water, low-cost . Emerging Techniques for Treatment of Toxic Metals from Wastewater explores the different physical and chemical methods that can be used to remove toxins from wastewater, including adsorption, solvent extraction, ion exchange, precipitation, filtration and photocatalytic degradation. Despite the frequent use of adsorption in wastewater treatment systems, commercially available activated carbon remains an expensive Physicochemical treatment Sorption The process of sorption includes two phe-nomena. INTRODUCTION. The second is the absorp- The first of them is adsorption, which involves the attachment of molecules on the sur-face of a solid or liquid. It is also used in home water treatment and to treat water used in aquariums and swimming pools. Discharge of colored wastewater from various industries like textile, dying, food processing, leather, cosmetics, and paper industries and so on, is a major problem for environmental management particularly in developing countries [1]. It preferentially focuses its attention on (but not limited to) the removal of heavy metals. This process creates a film of the adsorbate on the surface of the adsorbent.This process differs from absorption, in which a fluid (the absorbate) is dissolved by or permeates a liquid or solid (the absorbent), respectively. Coagulation and activated carbon adsorption (ACA) techniques provides alternative medium for removing color at a much lower cost as compared with ACA only. The adsorption process is being extensively used for the removal of dyes from dye house effluents by various researchers. This book provides researchers and graduate students with an overview of the latest developments in and applications of adsorption processes for water treatment and purification. of organic compounds in wastewater can be re-duced by a few percents (Bartkiewicz and Um - iejewska 2010). Adsorption, waste. 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