A study of the degradation of phenoxy acid herbicides at different sites in a limestone aquifer.

被引：53

作者：

Harrison, I ^{[1
]}

Leader, RU ^{[1
]}

Higgo, JJW ^{[1
]}

Williams, GM ^{[1
]}

机构：

[1] British Geol Survey, Fluid Proc & Waste Management Grp, Kingsley Dunham Ctr, Nottingham NG12 5GG, England

来源：

CHEMOSPHERE | 1998年 / 36卷 / 06期

关键词：

D O I：

10.1016/S0045-6535(97)10043-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The biodegradation of three phenoxyalkanoic acid herbicides, viz. MCPA, dichlorprop and mecoprop, under aerobic and anaerobic conditions was investigated using microcosm techniques. The field studies were conducted in a limestone aquifer that had suffered contamination from leaking landfill sites in which phenoxyalkanoic acid herbicides (mostly mecoprop) had undergone disposal. The results from in situ field and laboratory microcosms indicated that under microbially active aerobic conditions the biotransformation of all three herbicides was rapid and that lag phases were short. Under fully aerobic conditions the concentration of each of the three herbicides was reduced from 2,000 mu g/l to below the detection limit (approx. 10 mu g/l) of the HPLC system, used for their analysis, within 14 days. However, under microbially active anaerobic conditions no degradation of the herbicides could be discerned over the 100-200 day duration of the experiments. This finding has significant implications for the disposal of phenoxyalkanoic acid herbicides particularly in situations where any resulting leachate may find its way into underlying water resources. (C) 1998 Elsevier Science Ltd.

引用

页码：1211 / 1232

页数：22

共 29 条

[11]

HEM JD, 1960, 1459B US GEOL SURV

[12] DEGRADATION OF THE HERBICIDE MECOPROP IN AN AEROBIC AQUIFER DETERMINED BY LABORATORY BATCH STUDIES [J].