| 萘和菲在黄土上的吸附动力学 |
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| 引用本文： | 展惠英,蒋煜峰,袁建梅,陈慧,韩晓梅.萘和菲在黄土上的吸附动力学[J].环境科学与技术,2005,28(5):10-11,65. |
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| 作者姓名： | 展惠英 蒋煜峰 袁建梅 陈慧 韩晓梅 |
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| 作者单位： | 甘肃联合大学理工学院,兰州,730000;西北师范大学化学化工学院,兰州,730070;西北师范大学化学化工学院,兰州,730070;张掖师专化学系,张掖,734000 |
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| 摘 要： | 研究了萘和菲在天然黄土和阳离子表面活性剂改性黄土上的吸附动力学过程。结果表明,萘和菲在阳离子表面活性剂改性黄土上吸附速率比在天然黄土上的快,同时吸附数据都能很好的符合一级动力学方程;吸附速率与起始浓度、温度及黄土本身的性质有关;萘和菲的吸附速率常数k与温度T成负相关。吸附反应的活化能分别为:-6.196~-1.172kJ/mol和-28.86~-15.70kJ/mol;萘和菲在天然黄土和阳离子改性黄土上的吸附速率由膜扩散和孔扩散过程控制,实验数据可以用扩散动力学方程拟合。本研究为理解多环芳烃在土壤中的迁移规律提供了理论基础,同时有助于理解土壤环境中石油污染物的迁移。
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| 关 键 词： | 萘 菲 黄土 吸附动力学 活化能 |
| 文章编号： | 1003-6504（2005）05-0010-03 |
| 收稿时间： | 2004-06-23 |
| 修稿时间： | 2004-06-232004-09-08 |
Sorption Kinetics of Naphthalene and Phenanthrene to Loess Soils |
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| ZHAN Hui-ying ,JIANG Yu-feng ,YUAN Jian-mei ,CHEN Hui.Sorption Kinetics of Naphthalene and Phenanthrene to Loess Soils[J].Environmental Science and Technology,2005,28(5):10-11,65. |
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| Authors: | ZHAN Hui-ying JIANG Yu-feng YUAN Jian-mei CHEN Hui |
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| Institution: | ZHAN Hui-ying 1,2,JIANG Yu-feng 2,YUAN Jian-mei 2,CHEN Hui 2 |
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| Abstract: | Phenanthrene and naphthalene were chosen as organic contaminant indicators in loess soils modified by cation surfactant, hexadecyl-trimethylammonium bromide (HDTMAB). The experimental results indicated that sorption rate of the soils modified by cation surfactant was higher than that of the natural soils, observing a first-order kinetics. The rate constants displayed negative correlation with temperature. The result can be used to predict sorption kinetics of phenanthrene and naphthalene to loess soils and, in wider perspective, be used to better understand the transport of petroleum contaminants in soil environment. |
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| Keywords: | naphthalene phenanthrene loess soils sorption kinetics activation energy |
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