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首页> 外文期刊>Environmental Science & Technology >Leaching of Metribuzin Metabolites and the Associated Contamination of a Sandy Danish Aquifer
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Leaching of Metribuzin Metabolites and the Associated Contamination of a Sandy Danish Aquifer

机译：Metribuzin代谢物的浸出与丹麦沙质含水层的相关污染

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摘要

As degradation products of metribuzin have received little attention as potential groundwater contaminants,we evaluated leaching of metribuzin and its primary metabolites desaminometribuzin(DA),desaminodiketometribuzin(DADK),and diketometribuzin(DK)at a sandy test site in Denmark.Soil water and groundwater were sampled monthly over a four-year period.Leaching of metribuzin and DA was negligible.DK and DADK leached from the root zone(1 meter below ground surface(mbgs))in average concentrations considerably exceeding the ED limit value for drinking water(0.1 mug/L).Both metabolites appear to be relatively stable and persisted in soil water and groundwater several years after application.Past application of metribuzin at the site had contaminated the groundwater with both DK and DADK,which were detected in 99% and 48%,respectively,of the groundwater samples analyzed.Except for three of the groundwater samples,the DADK concentration never exceeded the ED limit value.In contrast,the annual concentration of DK exceeded 0.1 mug/L at 90% of the screens analyzed.The present findings suggest that as the degradation products of metribuzin can leach through sandy soil in high concentrations,they could potentially contaminate the groundwater.In view of this risk DK and DADK should both be included in monitoring programs and their ecotoxicological effects should be further investigated.
机译：由于Metribuzin的降解产物几乎没有作为潜在的地下水污染物而受到关注，因此我们在丹麦的一个沙质试验场评估了Metribuzin及其主要代谢产物desaminometribuzin（DA），desaminodiketometribuzin（DADK）和diketometribuzin（DK）的浸出。土壤水和地下水四年内每月进行一次取样，其中的metribuzin和DA的浸出量可以忽略不计，DK和DADK从根区（地下1米（mbgs））中浸出，平均浓度大大超过饮用水的ED限值（0.1）施用后数年，这两种代谢物似乎都相对稳定并在土壤水和地下水中持续存在。在该地点的过去使用的Metribuzin过去曾用DK和DADK污染了地下水，检出率分别为99％和48％分别分析了三个地下水样品。除三个地下水样品外，DADK浓度从未超过ED限值。 DK的浓度在分析的90％的筛子上超过了0.1杯/升。本研究结果表明，由于美甲菌素的降解产物可通过高浓度的沙土浸出，因此有可能污染地下水。 DADK应同时纳入监测计划，其生态毒理作用应进一步调查。

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  • 来源
    《Environmental Science & Technology》 |2005年第21期|p.8374-8381|共8页
  • 作者

    JEANNE KJER; PREBEN OLSEN; TRINE HENRIKSEN; MARLENE ULLUMt;

  • 作者单位

    Geological Survey of Denmark and Greenland,0ster Voldgade 10,DK-1350 Copenhagen,Denmark,and Danish Institute of Agricultural Sciences,Research Centre Foulum,DK-8830 Tjele,Denmark;

    Geological Survey of Denmark and Greenland,0ster Voldgade 10,DK-1350 Copenhagen,Denmark,and Danish Institute of Agricultural Sciences,Research Centre Foulum,DK-8830 Tjele,Denmark;

    Geological Survey of Denmark and Greenland,0ster Voldgade 10,DK-1350 Copenhagen,Denmark,and Danish Institute of Agricultural Sciences,Research Centre Foulum,DK-8830 Tjele,Denmark;

    Geological Survey of Denmark and Greenland,0ster Voldgade 10,DK-1350 Copenhagen,Denmark,and Danish Institute of Agricultural Sciences,Research Centre Foulum,DK-8830 Tjele,Denmark;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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