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REMOVAL OF ARSENATE (V) BY SURFACTANT-MODIFIED ACTIVATED CARBON

文献类型： 外文期刊

作者： Zhang, Guangzhi 1 ; Hu, Hao 2 ; Sun, Weiling 1 ; Zhao, Bin 1 ; Lu, Xuemei 1 ; Ni, Jinren 1 ;

作者机构： 1.Peking Univ, Dept Environm Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Digital Agr, Hangzhou 310021, Zhejiang, Peoples R China

关键词： activated carbon;Arsenate (V);cetyltrimethylammonium bromide;cetylpyridinium bromide;surfactant

期刊名称：ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL （ 影响因子：0.916； 五年影响因子：0.869 ）

ISSN： 1582-9596

年卷期： 2012 年 11 卷 8 期

页码：

收录情况： SCI

摘要： Cationic surfactants, cetylpyridinium bromide and cetyltrimethylammonium bromide, were applied to modify granular activated carbon (CPB-C and CTAB-C) in order to provide efficient adsorbents for the removal of arsenate (V). The adsorption in the first 120 min was fast. From 120 min to 360 min, the adsorption became slower and gradually reached equilibrium at 24 h. The percentage removal by 0.1 g CTAB-C and CPB-C in 10 ml 700 mu g/L arsenate (V) solution could achieve 90% and 82%, respectively. The adsorption kinetics could be satisfactorily described by the pseudo-second order model. The adsorption isotherms could be better described by Langmuir model. The percentage removal remained constant at initial concentration of 100-1000 mu g/L and pH range 2-10, which were of significance for practical application. The optimum adsorbent dosage for CPB-C and CTAB-C were 0.12 g and 0.08 g per 10 mL solution, respectively. CTAB-C was more efficient than CPB-C in terms of initial adsorption rate, maximum arsenate uptake, pH and adsorbent dosage. The improvement of the adsorption capacity by cationic surfactants could be attributed to be the exchangeable anion provided by the adsorbed surfactants.

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[1]Sorption of phenanthrene on to soil fractions in the presence of Triton X-100. Zhang, Guangzhi,Sun, Weiling,Lu, Xuemei,Ni, Jinren,Hu, Hao.

[2]Adsorption of methylene blue onto activated carbon produced from tea (Camellia sinensis L.) seed shells: kinetics, equilibrium, and thermodynamics studies. Gao, Jun-jie,Zhou, Tao,Xu, Ping,Hochstetter, Danielle,Wang, Yue-fei,Qin, Ye-bo,Cao, Dong-dong,Wang, Yue-fei. 2013

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