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A review on applicability for the removal of hazardous dyes from aqueous waste.pdf

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A review on applicability for the removal of hazardous dyes from aqueous waste

Environ Monit Assess DOI 10.1007/s10661-011-1914-0 A review on applicability of naturally available adsorbents for the removal of hazardous dyes from aqueous waste Pankaj Sharma · Harleen Kaur · Monika Sharma · Vishal Sahore Received: 29 March 2010 / Accepted: 27 January 2011 ? Springer Science+Business Media B.V. 2011 Abstract The effluent water of many industries, such as textiles, leather, paper, printing, cosmetics, etc., contains large amount of hazardous dyes. There is huge number of treatment processes as well as adsorbent which are available for the processing of this effluent water-containing dye content. The applicability of naturally available low cast and eco-friendly adsorbents, for the re- moval of hazardous dyes from aqueous waste by adsorption treatment, has been reviewed. In this review paper, we have provided a compiled list of low-cost, easily available, safe to handle, and easy-to-dispose-off adsorbents. These adsorbents P. Sharma (B) · H. Kaur Department of Chemistry, Lovely School of Sciences, Lovely Professional University, Phagwara 144402, Punjab, India e-mail: sharmapankaj47@ P. Sharma Energy and Environment Fusion Technology Center, Department of Environmental Engineering and Biotechnology, Myongji University, San 38-2, Nam-dong, Cheoin-Gu, Yongin-Si 449-728, Republic of Korea M. Sharma Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India V. Sahore Department of Microelectronics Photonics, University of Arkansas, Fayetteville, AR 72701, USA have been classified into five different categories on the basis of their state of availability: (1) waste materials from agriculture and industry, (2) fruit waste, (3) plant waste, (4) natural inorganic mate- rials, and (5) bioadsorbents. Some of the treated adsorbents have shown good adsorption capaci- ties for methylene blue, congo red, crystal violet, rhodamine B, basic red, etc., but this adsorption process is highly pH dependent, and the pH of the medium plays an important ro