Removal of Dyes and Heavy Metals by Using Low Cost Adsorbents -A review

Dubey, Som Shankar; Rao, Battula Sreenivasa
January 2012
Journal of Pharmacy Research;2012, Vol. 5 Issue 1, p461
Academic Journal
Growing concern about environmental issues has prompted the textile industry to investigate appropriate and environmentally friendly treatment technologies. Waste aqueous effluent containing color and heavy metals causes serious environmental problems. A large variety of dyestuffs can be found in real effluents such as acid, basic, reactive, direct, etc. It has been estimated that about 9 % of the total amount of dyestuffs produced in the world are discharged in wastewater. The most frequently applied adsorbent for the removal of organic pollutants in wastewaters is currently activated carbon. However, activated carbon is an expensive material. The use of alternative and perhaps cheaper adsorbents is attractive. This review evaluates a number of different adsorbents and types of dyes. The review also outlines some of the fundamental principles of dye adsorption onto adsorbents.


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