矿产综合利用Issue(1)：113-117,101,6.DOI:10.3969/j.issn.1000-6532.2017.01.026
HTMAC改性膨润土吸附水中六价铬的动力学和热力学研究
Kinetics and Thermodynamics Study on Adsorption of Cr(Ⅵ) in Aqueous Solution Using HTMAC Modified Bentonite
摘要
Abstract
N-Hexadecyltrimethylammon(HTMAC)was used to be an organic modifier,N-Hexadecyltrimethylammon modified benonite(HTMAC-Bent) was prepared and it was exploited to adsorb hexavalent chromium(Cr(Ⅵ))in aqueous solution.The kinetics equations of Pseudo-second-order,Intraparticle diffusion and Elovich were used to describe adsorption process of Cr(Ⅵ) using HTMAC-Bent,both of Langmuir and Freundlich isotherm models were also utilized to evaluate adsorption process of Cr (Ⅵ)using HTMAC-Bent.The kinetics results showed that pseudo second-order equation was the best fitted with the adsorption process and all of the correlation coefficients (R2) were more than 0.999.It confirmed that this process is a kind of physicochemical adsorption.Thermodynamics results displayed that Freundlich adsorption isothermal model was better than that of Langmuir adsorption isotherm models to describe the adsorption process with the correlation coefficient(R2) greater than 0.991.Therefore,the adsorption process of Cr (Ⅵ) in aqueous solution using HTMAC-Bent belong to multilayer adsorption process,and is also a kind of spontaneously disorderedly endothermic process.关键词
有机改性膨润土/十六烷基三甲基氯化铵/六价铬/吸附/动力学/热力学Key words
Organo-bentonite/N-Hexadecyltrimethylammon/Cr(Ⅵ)/Adsorption/Kinetics/Thermodynamics分类
矿业与冶金引用本文复制引用
黄丽,陈征贤,黄怀国,葛秀秀,叶淑爱,王伟..HTMAC改性膨润土吸附水中六价铬的动力学和热力学研究[J].矿产综合利用,2017,(1):113-117,101,6.基金项目
国家质检总局科技计划项目(2015IK185) （2015IK185）
