Groundwater contamination by azinphos methyl in the Northern Patagonic Region (Argentina)

被引:55
作者
Loewy, M [1 ]
Kirs, V [1 ]
Carvajal, G [1 ]
Venturino, A [1 ]
de D'Angelo, AMP [1 ]
机构
[1] Natl Univ Comahue, Dept Chem, LIBIQUIMA, RA-1400 Buenos Aires, DF, Argentina
关键词
pesticides; groundwater contamination; azinphos methyl;
D O I
10.1016/S0048-9697(98)00365-9
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Approximately 30 groundwater monitoring wells, under a fruit production field, in the Valley of the Neuquen River (Northern Patagonic, Argentina), to which different pesticides have been applied, were sampled eleven times between October 1995 and March 1997. Azinphos methyl was the main pesticide applied and it was detected with the highest frequency in groundwater wells during the period of intensive pesticide application in the Southern Hemisphere. Dimethoate, methidathion, fosmet, cipermethrin, carbaryl, propoxur, carbofuran, benomyl and carbendazim were also detected with lower frequency. The characteristic of the area under study was alkaline soil, with an organic matter content below 2.5% and texture sandy clay loam. The half life of azinphos methyl in sons was 166.2 days in the sun light for horizon A and 194.15 in the dark for horizon B. Leaching of azinphos methyl through the different soil horizons was minimum. On the basis of our lysimeter laboratory data, in which most of the pesticide was adsorbed into the soil column and only small quantities leachate, we inferred that the impact of azinphos methyl on groundwater would be minimal. However, field data indicates that there is a persistence of azinphos methyl in groundwater during the application season. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:211 / 218
页数:8
相关论文
共 14 条
[11]   PESTICIDE CONTAMINATION OF GROUND-WATER IN THE UNITED-STATES - A REVIEW [J].
RITTER, WF .
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES, 1990, 25 (01) :1-29
[12]  
WASSMUTHWAGNER J, 1989, JPC-J PLANAR CHROMAT, P297
[13]   PESTICIDE CONTENT OF SURFACE-WATER DRAINING FROM AGRICULTURAL FIELDS - REVIEW [J].
WAUCHOPE, RD .
JOURNAL OF ENVIRONMENTAL QUALITY, 1978, 7 (04) :459-472
[14]   SOME ASPECTS OF SURFACE INTERACTIONS OF CLAYS WITH ORGANOPHOSPHORUS PESTICIDES [J].
YARON, B .
SOIL SCIENCE, 1978, 125 (04) :210-216