Transport of organochlorine pesticides in soil columns enhanced by dissolved organic carbon

被引：27

作者：

Ding, JY

Wu, SC

机构：

[1] Grad. Inst. of Environ. Engineering, National Taiwan University, Taipei 10770

来源：

WATER SCIENCE AND TECHNOLOGY | 1997年 / 35卷 / 07期

关键词：

dissolved organic carbon (DOC); humic acid; hydrophobic organic contaminants; organochlorine pesticides (OCPs); soil column; partition coefficient; three-phase transport model;

D O I：

10.1016/S0273-1223(97)00124-8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The objective of this study is to quantify the effects of humic acid solution infiltration on the transport of organochlorine pesticides (OCPs) in soil columns using a three-phase transport model. From experimental results, it is found that the dissolved organic carbon enhances the transport of OCPs in the soil columns. In the OCPs-only column, the concentration profiles of OCPs can be simulated well using a two-phase transport model with numerical method or analytical solution. In the OCPs-DOC column, the migrations of aldrin, DDT and its daughter compounds are faster than those in the OCPs-only column. The simulation with the three-phase model is more accurate than that with the two-phase model. in addition, significant decrease of the fluid pore velocities of the OCPs-DOC column was found. When DOC leachate is applied for remediation of soil or groundwater pollution, the decrease of mean pore velocities will be a crucial affecting factor. (C) 1997 IAWQ. Published by Elsevier Science Ltd.

引用

页码：139 / 145

页数：7

共 13 条

[1] PARTITIONING OF ORGANIC-COMPOUNDS IN OCTANOL-WATER SYSTEMS [J].