酸性染料在有机膨润土上的吸附
Adsorption of acid dye onto organobentonite.
作者信息
Baskaralingam P, Pulikesi M, Elango D, Ramamurthi V, Sivanesan S
机构信息
Department of Chemical Engineering, A.C. College of Technology, Anna University, Chennai, Tamilnadu 600025, India.
出版信息
J Hazard Mater. 2006 Feb 6;128(2-3):138-44. doi: 10.1016/j.jhazmat.2005.07.049. Epub 2005 Dec 19.
Removal of Acid Red 151 from aqueous solution at different dye concentrations, adsorbent doses and pH has been studied. The bentonite clay has been modified using cationic surfactants, which has been confirmed using XRD and FT-IR analyses. Experimental result has shown that the acidic pH favours the adsorption. The adsorption isotherms are described by means of Langmuir and Freundlich isotherms. The adsorption capacity has been found to be 357.14 and 416.66 mg g(-1) for the cetyldimethylbenzylammonium chloride-bentonite (CDBA-bent) and cetylpyridinium chloride-bentonite (CP-bent), respectively. Kinetic studies show that the adsorption followed second-order kinetics.
研究了在不同染料浓度、吸附剂剂量和pH值条件下从水溶液中去除酸性红151的情况。使用阳离子表面活性剂对膨润土进行了改性，这已通过X射线衍射（XRD）和傅里叶变换红外光谱（FT-IR）分析得到证实。实验结果表明，酸性pH值有利于吸附。吸附等温线用朗缪尔等温线和弗伦德利希等温线来描述。已发现十六烷基二甲基苄基氯化铵改性膨润土（CDBA-bent）和十六烷基吡啶氯化铵改性膨润土（CP-bent）的吸附容量分别为357.14和416.66 mg g(-1)。动力学研究表明，吸附遵循二级动力学。
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