BS-12+CTMAB复配修饰黄棕壤对菲的吸附

刘伟; 李文斌; 孟昭福; 杭朝曦; 王腾; 胡啸龙; 任爽

文章摘要

刘伟,李文斌,孟昭福,杭朝曦,王腾,胡啸龙,任爽.BS-12+CTMAB复配修饰黄棕壤对菲的吸附[J].农业环境科学学报,2018,37(4):725-731.

BS-12+CTMAB复配修饰黄棕壤对菲的吸附

Adsorption of phenanthrene on amphoteric-cationic modified yellow-brown soil

投稿时间：2017-09-29

DOI：10.11654/jaes.2017-1474

中文关键词: 两性复配修饰黄棕壤苯酚菲吸附能力

英文关键词: combined modification yellow-brown soil phenol phenanthrene adsorption capacity

基金项目:国家自然科学基金项目（41271244）；陕西省重点研发计划（2017SF-385）

作者	单位	E-mail
刘伟	西北农林科技大学资源环境学院, 陕西杨凌 712100 新疆工程学院化学与环境工程系, 乌鲁木齐 830091
李文斌	西华师范大学环境科学与工程学院, 四川南充 637009
孟昭福	西北农林科技大学资源环境学院, 陕西杨凌 712100 农业部西北植物营养与农业环境重点实验室, 陕西杨凌 712100	zfmeng1996@263.net
杭朝曦	西北农林科技大学资源环境学院, 陕西杨凌 712100
王腾	西北农林科技大学资源环境学院, 陕西杨凌 712100
胡啸龙	西北农林科技大学资源环境学院, 陕西杨凌 712100
任爽	西北农林科技大学资源环境学院, 陕西杨凌 712100

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中文摘要:

为了探究两性阳离子复配修饰黄棕壤对菲的吸附效应及影响机制，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）复配修饰膨润土吸附苯酚的最佳修饰比例，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。通过批处理法研究了两性复配修饰黄棕壤对菲的吸附特征，分析了温度、pH值和离子强度对复配修饰黄棕壤吸附菲的影响，并探讨了复配修饰黄棕壤对菲的吸附机理。结果表明，随着总修饰比例的增大，2种复配修饰黄棕壤对菲的吸附能力均逐渐增强，Henry模型适合描述2种复配修饰黄棕壤对菲的吸附；2种修饰黄棕壤对菲吸附量均随温度、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；2种复配修饰黄棕壤对菲的吸附均以分配吸附为主，总体上修饰黄棕壤对菲和苯酚的吸附具有相似的机制。土样阳离子交换量（CEC）和修饰比例是两性复配修饰黄棕壤吸附菲的决定因素。

英文摘要:

Two series of amphoteric-cationic modified yellow-brown soils, containing 43% and 6% montmorillonite, were used to explore the adsorption effect and mechanism of phenanthrene on co-modified yellow-brown soils. The experiment was based on the best modification ratio of adsorption of phenol on montmorillonite modified by an amphoteric modifier of dodecyl dimethyl betaine(BS-12) and a cationic modifier of hexadecyltrimethyl ammonium bromide(CTMAB). The adsorption properties of phenanthrene at different temperature, pH, and ionic strength were analyzed. The related adsorption mechanism was also explored. Results showed that adsorption of phenanthrene on co-modified yellow-brown soils increased as the total modification ratios increased. The Henry model successfully described the adsorption of phenanthrene. Adsorption of phenanthrene on modified yellow-brown soils decreased as temperature and pH increased, but increased as ionic strength increased at low concentration ranges. Distribution played a leading role in the adsorption of phenanthrene on co-modified yellow-brown soils. In general, the mechanism of phenanthrene adsorption on modified yellow-brown soils was similar to that of phenol. Overall, cation exchange capacity(CEC) and modification ratios were the most important factors influencing the adsorption of phenanthrene on co-modified yellow-brown soils.

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