| 两性与两性复配修饰膨润土增强塿土吸附Cr(VI)的研究 |
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| 引用本文： | 李文斌,孟昭福,刘泽,吴琼,许绍娥,朱军. 两性与两性复配修饰膨润土增强塿土吸附Cr(VI)的研究[J]. 环境科学学报, 2016, 36(10): 3810-3817 |
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| 作者姓名： | 李文斌 孟昭福 刘泽 吴琼 许绍娥 朱军 |
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| 作者单位： | 西北农林科技大学资源环境学院, 杨凌 712100,1. 西北农林科技大学资源环境学院, 杨凌 712100;2. 农业部西北植物营养与农业环境重点实验室, 杨凌 712100,西北农林科技大学资源环境学院, 杨凌 712100,西北农林科技大学资源环境学院, 杨凌 712100,Department of Biological and Agriculture Engineering, University of Arkansas, Fayetteville 72707, US,Department of Biological and Agriculture Engineering, University of Arkansas, Fayetteville 72707, US |
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| 基金项目： | 国家自然科学基金（No.41271244）；陕西省社会发展攻关项目（No.2013K13-01-05） |
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| 摘 要： | 为了证实添加修饰黏土对塿土吸附Cr(VI)的增强作用,分别将2%、5%、8%和10%(质量分数)的200%CEC BS-12(十二烷基二甲基甜菜碱)修饰膨润土(B200B)和100%CEC BS-12+100%CEC DTAB(十二烷基三甲基溴化铵)复配修饰膨润土(B100B/100D)加入到天然塿土,以批处理法研究供试土样对Cr(VI)的等温吸附特征,并对比了p H值、温度和离子强度(I)对Cr(VI)吸附的影响.结果表明:不同B100B/100D塿土(B100B/100D混合塿土)和B200B塿土对Cr(VI)的吸附量分别是CK(塿土)的1.52~4.28和1.99~5.12倍,且等添加比例下B200B塿土对Cr(VI)的吸附量高于B100B/100D塿土.10~30℃范围内,CK、2%B100B/100D和2%B200B塿土对Cr(VI)的吸附呈增温正效应;当修饰土添加比例大于2%时,温度效应由增温正效应向负效应转变.CK对Cr(VI)的吸附量在不同p H值(4~7)处理下差异不显著,而B100B/100D和B200B塿土对Cr(VI)的吸附量均随p H值升高而降低.CK和B100B/100D塿土对Cr(VI)的吸附量均随离子强度(I)的增大而降低,B200B塿土对Cr(VI)的吸附量以I=0.1 mol·L~(-1)时最高,以I=0.5 mol·L~(-1)时最低.B100B/100D和B200B塿土吸附Cr(VI)是自发的物理过程,随修饰土添加比例的增大,吸附表现为焓增、熵减特征.
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| 关 键 词： | 两性修饰 膨润土 塿土 Cr(VI) 吸附量 |
| 收稿时间： | 2015-11-13 |
| 修稿时间： | 2016-01-20 |
Enhanced absorption of Cr(VI) on Lou soil by amphoteric and amphoteric-cationic modified bentonite |
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| LI Wenbin,MENG Zhaofu,LIU Ze,WU Qiong,XU Shao''e and ZHU Jun. Enhanced absorption of Cr(VI) on Lou soil by amphoteric and amphoteric-cationic modified bentonite[J]. Acta Scientiae Circumstantiae, 2016, 36(10): 3810-3817 |
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| Authors: | LI Wenbin MENG Zhaofu LIU Ze WU Qiong XU Shao''e ZHU Jun |
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| Affiliation: | Department of Natural Resource and Environment, Northwest A & F University, Yangling 712100,1. Department of Natural Resource and Environment, Northwest A & F University, Yangling 712100;2. Key Laboratory of Plant Nutrition and Agri-Environment in Northwest China, Ministry of Agriculture, Yangling 712100,Department of Natural Resource and Environment, Northwest A & F University, Yangling 712100,Department of Natural Resource and Environment, Northwest A & F University, Yangling 712100,Department of Biological and Agriculture Engineering, University of Arkansas, Fayetteville 72707, US and Department of Biological and Agriculture Engineering, University of Arkansas, Fayetteville 72707, US |
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| Abstract: | |
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| Keywords: | amphoteric modification bentonite Lou soil Cr(VI) adsorption amount |
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