| 改性土壤对水中苄黄隆的吸附行为研究 |
| |
| 引用本文： | 赵景婵,郭治安,陈经涛,王鹏超.改性土壤对水中苄黄隆的吸附行为研究[J].离子交换与吸附,2003,19(4):324-330. |
| |
| 作者姓名： | 赵景婵 郭治安 陈经涛 王鹏超 |
| |
| 作者单位： | 1. 西北大学化学系,西安,710069
2. 陕西教育学院生化系,西安,710061 |
| |
| 基金项目： | 西北大学校内基金 (编号99NW50) |
| |
| 摘 要： | 研究了季铵盐阳离子表面活性荆四甲基铵离子(TMA)和十六烷基三甲基铵离子(HDTMA)改性的黄土l,黄土2，沉积物对水中苄黄隆的吸附作用．结果表明：改性后土壤对苄黄隆的吸附能力提高．同时考察了改性土壤对苄黄隆吸附的热力学行为．结果表明：HDTMA改性的土壤对苄黄隆的吸附等温线为线性，吸附类型以分配为主．HDTMA改性黄土1吸附热为-6．12kJ/mol，HDTMA改性黄土2的吸附热为-8．44kJ/mol。HDTMA改性沉积物的吸附热为-4．04kJ／mol．结合力以疏水作用力为主：TMA改性的土壤对苄黄隆的吸附等温线符合Freundlich方程．考察了溶液pH对吸附量的影响．结果表明在酸性条件下．改性土壤的吸附能力较大．
|
| 关 键 词： | 改性土壤 水 苄黄隆 吸附行为 阳离子表面活性剂 土壤污染 |
| 文章编号： | 1001-5493(2003)04-0324-07 |
| 修稿时间： | 2003年2月23日 |
SORPTION OF BENSULFURON-METHYL IN CATIONIC SURFACTANTS MODIFIED SOILS |
| |
| Abstract: | Three soils were modified with two kinds of cationic surfactants tetramethylammonium (TMA) and hexadecyltrimethylammonium (HDTMA) in order to increase their sorption powers. The adsorption of bensulfuron-methyl on six kinds of modified soils has been investigated. Modified soils have higher ability to sorb bensulfuron-methyl than unmodified ones. It was found that adsorption isotherms of hexadecyltrimethylammonium- modified soils could fit Linear equation; adsorption isotherms of tetramethylammonium- modified soils could fit Freundlich equation. The sorption of bensulfuron-methyl on six modified soils was via partition. The sorption of hexadecyltrimethylammonium modified soils parameters of thermodynamics were in the range of 8.44kJ/mol~-4.04kJ/mol. |
| |
| Keywords: | Modified soils Bensulfuron-methyl Cationic surfactants Sorption |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
