| 应用多元线性溶剂化能关系研究有机膨润土的吸附特征 |
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| 引用本文： | 陈望香,朱润良,葛飞,王通,朱门君,刘汉阳,夏燕湘.应用多元线性溶剂化能关系研究有机膨润土的吸附特征[J].环境科学学报,2011,31(5):1019-1025. |
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| 作者姓名： | 陈望香 朱润良 葛飞 王通 朱门君 刘汉阳 夏燕湘 |
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| 作者单位： | 湘潭大学环境科学与工程系,湘潭,411105 |
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| 基金项目： | 国家自然科学基金青年基金项目,湖南省教育厅基金 |
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| 摘 要： | 以十六烷基三甲基溴化铵(CTMAB)制备的有机膨润土为代表,设置有机膨润土中CTMAB的负载量为1.0倍的阳离子交换量(CEC),测试了其吸附酚类、胺类、硝基类等25种有机物的有机碳标化的吸附系数(K∝)值.在此基础上,运用多元线性回归方法得到了有机膨润土吸附有机物的多元线性溶剂化能关系(LSER)模型,以明确各种作用...
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| 关 键 词： | CTMAB 有机膨润土 吸附 线性溶剂化能关系(LSER) 有机物 |
| 收稿时间： | 7/30/2010 5:04:55 PM |
| 修稿时间： | 2010/9/10 0:00:00 |
Investigation on the sorptive characteristics of organobentonites using a linear solvation energy relationship |
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| CHEN Wangxiang,ZHU Runliang,GE Fei,WANG Tong,ZHU Menjun,LIU Hanyang and XIA Yanxiang.Investigation on the sorptive characteristics of organobentonites using a linear solvation energy relationship[J].Acta Scientiae Circumstantiae,2011,31(5):1019-1025. |
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| Authors: | CHEN Wangxiang ZHU Runliang GE Fei WANG Tong ZHU Menjun LIU Hanyang and XIA Yanxiang |
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| Institution: | Department of Environmental Science & Engineering, Xiangtan University, Xiangtan 411105,Department of Environmental Science & Engineering, Xiangtan University, Xiangtan 411105,Department of Environmental Science & Engineering, Xiangtan University, Xiangtan 411105,Department of Environmental Science & Engineering, Xiangtan University, Xiangtan 411105,Department of Environmental Science & Engineering, Xiangtan University, Xiangtan 411105,Department of Environmental Science & Engineering, Xiangtan University, Xiangtan 411105 and Department of Environmental Science & Engineering, Xiangtan University, Xiangtan 411105 |
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| Abstract: | In this paper, the cetyltrimethylammonium bromide (CTMAB) synthesized organobentonite was selected as the representative of organobentonites. The cetyltrimethylammonium bromide loading amount is equal to 1.0CEC. Values of the organic-carbon-based partition coefficient (Koc) for 25 organic compounds (including phenols, amines, nitro, etc.) on this organobentonite were calculated. The linear solvation energy relationship model for the organic adsorption by organobentonites was obtained by multilinear regression analysis to clarify the role of various factors on the adsorption of organobentonites. The results show that LSER equation could be described as logKoc=0.427+1.886E-0.625S+0.525A-2.223B+2.332V, which shows that the excess molar refraction term (e×E), hydrogen-bond acidity term (a×A) and cavity formation term (v×V) play positive role for the sorption of organic compounds from water to organobentonites, while the polarity and polarizability term (s×S) and hydrogen-bond basicity term (b×B) play negative role. This is in accordance with the sorption of organic compounds from water to soil organic matters, and it indicates that the sorptive characteristics of organobentonite have similarity to those of SOM. The overall contributions of the five terms to the sorption of the 25 organic compounds on organobentonites were calculated as: e×E (43% ~ 93%), s×S (-48% ~ -13%), a×A (0 ~ 24%), b×B (-75% ~ -11%), v×V (62% ~ 115%). The cavity formation term plays dominant role for the sorption process. |
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| Keywords: | organoclays sorption linear solvation energy relationship(LSER) organic compounds |
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