Enhancement of Sedimentation Velocity of Heavy Metals Loaded Hydroxyapatite Using Chitosan Extracted from Shrimp Waste

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• 作者：S. Kadouche (1)
  H. Lounici (2)
  K. Benaoumeur (2)
  N. Drouiche (3) nadjibdrouiche@yahoo.fr
  M. Hadioui (1)
  P. Sharrock (4)
• 关键词：Hydroxyapatite &#8211 ; Chitosan &#8211 ; Coagulation &#8211 ; Sedimentation velocity &#8211 ; Heavy metals
• 刊名：Journal of Polymers and the Environment
• 出版年：2012
• 出版时间：September 2012
• 年：2012
• 卷：20
• 期：3
• 页码：848-857
• 全文大小：465.3 KB
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• 作者单位：1. Facult茅 des Sciences, UMMTO, Campus Bastos, Tizi Ouzou, Algeria2. Laboratoire BIOGEP, Ecole Nationale Polytechnique d鈥橝lger, 10 Avenue pasteur El Harrach, Algiers, Algeria3. Department of Environmental Engineering, Silicon Technology Development Unit, 2, Bd Frantz Fanon BP140, Alger-7, 16027 Merveilles, Algeria4. LERISM, IUT Paul Sabatier, Universit茅 de Toulouse, Castres, France
• ISSN：1572-8900

文摘

In this study, synthesize hydroxyapatite (HA) suspensions sedimentation was used after usual terms as support for adsorption of heavy metals ions. Thus, the effectiveness of chitosan, produced from shrimp waste, in the flocculation of turbid suspensions resulting from the treatment of water contaminated with heavy metals was studied by adsorption on HA. Different particles sizes of HA were mainly controlled in this work (an average of granule size ranging from 1.6 to 63 μm). The results of Cu2+ and Zn2+ adsorption on HA showed relatively fast kinetics, with removal extent of 88–95 % by varying the initial total metal concentration. High removal rates were obtained for Cu2+. Chitosan was found to be able to eliminate by flocculation more than 98 % of turbid suspensions generated by metals adsorption on HA after only 30 min of sedimentation. Effects of pH and dose of chitosan on the coagulation–flocculation process were also studied. The optimal dose of chitosan was found between 0.2 and 2 mg/L which corresponds to an optimal pH ranging from 6 to 7.