| BS+CTMAB复配修饰在黄棕壤吸附苯酚上的应用 |
| 摘要点击 1542 全文点击 566 投稿时间：2016-12-01 修订日期：2017-03-01 |
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| 中文关键词 两性复配修饰 黄棕壤 蒙脱石 苯酚 吸附量 |
| 英文关键词 combined modification yellow brown soil montmorillonite phenol adsorption |
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| 中文摘要 |
| 本文基于两性修饰剂十二烷基二甲基甜菜碱（BS-12）和阳离子型表面修饰剂十六烷基三甲基溴化铵（CTMAB）复配修饰蒙脱石吸附苯酚的最佳修饰比例基础上，分别以蒙脱石含量为43%和6%的2种黄棕壤制备了2个系列的BS-12+CTMAB复配修饰土样.以两性复配修饰蒙脱石作对比，研究了2种两性复配修饰黄棕壤对苯酚的吸附特征，分析了温度、pH值和离子强度对两性复配修饰黄棕壤吸附苯酚的影响，并探讨了两性复配修饰蒙脱石与两性复配修饰黄棕壤以及两性复配修饰黄棕壤之间吸附苯酚的差异性.结果表明，和两性复配修饰蒙脱石相同，复配修饰增强了两性修饰黄棕壤对苯酚的吸附能力，30℃时吸附量呈215BS+215CT（215% BS-12+215% CTMAB） > 215CT（215% CTMAB） > 215BS（215% BS-12） > CK1（蒙脱石含量为43%未修饰黄棕壤）和33BS+33CT（33% BS-12+33% CTMAB） > 33CT（33% CTMAB）>33BS（33% BS-12） > CK2（蒙脱石含量为6%未修饰黄棕壤）顺序.Henry模型适用于描述苯酚在黄棕壤各供试土样中的吸附；2种修饰黄棕壤对苯酚吸附量均随温度、pH值的升高而降低，在低浓度范围内，随离子强度的增大而升高，和修饰蒙脱石吸附苯酚的规律相同；土样阳离子交换量（CEC）是决定两性复配修饰蒙脱石与黄棕壤以及2种两性复配修饰黄棕壤之间吸附苯酚存在差异的根本原因. |
| 英文摘要 |
| Based on the best modification ration of adsorption of phenol on montmorillonite modified by a mixture of amphoteric modifier, dodecyl dimethyl betaine(BS-12), and cationic modifier, hexadecyltrimethyl ammonium bromide(CTMAB),an experiment was designed to prepare two series of amphoteric-cationic modified soils by two yellow brown soils with montmorillonite contents of 43% and 6%,respectively. The adsorption properties of phenol were studied, and the adsorption influence at different temperature, pH and ionic strength was also analyzed and moreover, the adsorption differences between co-modified montmorillonite and yellow brown soils and between two co-modified yellow brown soils were discussed by comparing with co-modified montmorillonite. The results showed that adsorption of yellow brown soils as well as co-modified montmorillonite on phenol increased with combined modification, adsorption capacity was in order of 215BS+215CT(215%BS-12+215%CTMAB) > 215CT(215%CTMAB) > 215BS(215%BS-12) > CK1(unmodified soil containing montmorillonite content of 43%),33BS+33CT(33%BS-12+33%CTMAB) > 33CT(33%CTMAB) > 33BS(33%BS-12) > CK2(unmodified soil with montmorillonite content of 6%) at 30℃.Henry model described the adsorption of phenol very well. The phenol adsorption of modified yellow brown soils decreased with increasing temperature and pH, but increased with increasing ionic strength at low concentration ranges as well as modified montmorillonite. The basic reason for adsorption difference between co-modified montmorillonite and yellow brown soils and between two co-modified yellow brown soils was Cation Exchange Capacity(CEC). |
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