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Adsorptive Removal of Endocrine Disrupting Bisphenol a From Aqueous Solution Using Chitosan Publisher



Dehghani MH1, 2 ; Ghadermazi M3 ; Bhatnagar A4 ; Sadighara P5 ; Jahedkhaniki G5 ; Heibati B1 ; Mckay G6
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Authors Affiliations
  1. 1. Tehran University of Medical Sciences, School of Public Health, Department of Environmental Health Engineering, Tehran, Iran
  2. 2. Institute for Environmental Research, Center for Solid Waste Research, Tehran, Iran
  3. 3. Department of Environmental Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Department of Environmental Science, University of Eastern Finland, P.O. Box 1627, Kuopio, FI-70211, Finland
  5. 5. Department of Environmental Health Engineering, Division of Food Safety and Hygiene, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  6. 6. Division of Sustainability, College of Science and Engineering, Hamad Bin Khalifa University, Education City, Qatar Foundation, Doha, Qatar

Source: Journal of Environmental Chemical Engineering Published:2016


Abstract

Bisphenol-A (BPA) is an important industrial chemical generally introduced into the environment through the wastes of factories producing, for example, paper, plastics and plastic products-making industries. Consequently, factory effluents and sewage containing BPA are sources of contamination in the aquatic environments. The objective of this research is to study the efficiency of BPA removal from aqueous solutions using two chitosans, (1) synthesized chitosan; a waste derived adsorbent from waste seafood shell and which was synthesized in our laboratory and (2) commercial chitosan a chitosan sample obtained commercially. The effects of process parameters such as solution pH, adsorbent dose, contact time, and initial concentration of BPA have been examined and compared. The results obtained from this study indicated that the efficiency of removal declines with increased contaminant concentration and decreased adsorbent dose. The optimal pH for maximum adsorption for both chitosan adsorbents was 5. The adsorption data were fitted into six isotherm models namely Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Redlich-Peterson and Sips and the isotherm parameters were determined. Furthermore, the kinetics of the process were correlated by three kinetic models, namely, the pseudo-first-order, pseudo-second-order and intra-particle diffusion models. The kinetic experiments revealed that both chitosan adsorbents follow the pseudo-second-order kinetic model. The isotherm studies demonstrated that both adsorbents follow the Langmuir model. Based on the results, chitosan, synthesized (SC) and commercial (CC), is an efficient, novel and inexpensive alternative for the removal of BPA from aqueous solution. © 2016 Elsevier Ltd.All rights reserved.
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