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首页> 外文期刊>Environmental toxicology and chemistry >PESTICIDE AND TOXICITY REDUCTION USING AN INTEGRATED VEGETATED TREATMENT SYSTEM
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PESTICIDE AND TOXICITY REDUCTION USING AN INTEGRATED VEGETATED TREATMENT SYSTEM

机译：集成的植被处理系统可降低农药和毒性

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摘要

The California, USA, central coast is one of the most productive agricultural areas in the world, and numerous stakeholders are working there to implement conservation practices to reduce contaminated runoff. Practices include vegetated treatment systems (VTS) designed to promote contaminant reduction and breakdown. The current study evaluated the effectiveness of a vegetated drainage ditch incorporating a sedimentation basin, a vegetated section, and a Landguard organophosphate-A (OP-A) enzyme dosing system. The VTS was constructed on a working farm and was designed to remove organophosphate and pyrethroid pesticides, the primary pesticides causing toxicity in Salinas Valley watersheds. The present study was conducted during five separate irrigation events on tailwater runoff containing mixtures of pesticides and suspended sediments. Water samples were collected at four stations within the system, and these were subjected to chemical analyses and tested for toxicity to Ceriodaphnia dubia. All inflow samples were highly toxic to C. dubia, and this was largely because of diazinon. Treatment of diazinon-contaminated runoff was only partially effective using aquatic vegetation. All diazinon remaining after vegetated treatment was effectively removed after treatment with the Landguard OP-A enzyme. Chemical analysis of the VTS water samples showed that pyrethroid and organochlorine pesticide concentrations in water were greatly reduced in the sedimentation section of the ditch, and these pesticides were further reduced in the vegetated section of the ditch. The overall conclusion from these analyses is that the VTS was effective at reducing the more hydrophobic organochlorine and pyrethroid pesticides from water. The water-soluble pesticide diazinon was not sufficiently removed during the VTS residence times observed in this study; however, residual diazinon was effectively removed using Landguard OP-A. Environ. Toxicol. Chem. 2011;30:1036-1043.
机译：美国加利福尼亚中部海岸是世界上生产力最高的农业区之一，许多利益相关者正在那里努力实施保护措施，以减少污染的径流。实践包括旨在促进污染物减少和分解的植被处理系统（VTS）。当前的研究评估了植被排水沟的有效性，该沟渠包括一个沉淀池，一个植被区和一个Landguard有机磷酸盐-A（OP-A）酶定量给料系统。 VTS在一个工作农场上建造，旨在去除有机磷酸盐和拟除虫菊酯农药，这是在萨利纳斯山谷流域造成毒性的主要农药。本研究是在含有农药和悬浮沉积物混合物的尾水径流的五个单独灌溉事件中进行的。在系统内的四个站点收集了水样，并对它们进行了化学分析，并测试了对杜鹃花的毒性。所有流入的样品均对杜氏梭菌有剧毒，这主要是由于二嗪农。使用水生植被对地嗪农污染的径流的处理仅部分有效。用Landguard OP-A酶处理后，有效去除了所有植被治疗后残留的二嗪农。 VTS水样的化学分析表明，沟渠沉降区水中拟除虫菊酯和有机氯农药的浓度大大降低，而沟渠植被区的农药含量进一步降低。这些分析的总体结论是，VTS可以有效地减少水中的疏水性更强的有机氯和拟除虫菊酯类农药。在这项研究中观察到的VTS停留时间内，水溶性农药二嗪农没有被充分去除；但是，使用Landguard OP-A可以有效去除残留的二嗪农。环境。毒药。化学2011; 30：1036-1043。

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  • 来源
    《Environmental toxicology and chemistry》 |2011年第5期|p.1036-1043|共8页
  • 作者

    Brian Anderson; Bryn Phillips; J°hn Hunt; Bryan Largay; Rami Shihadeh; Ronald Tjeerdema;

  • 作者单位

    Department of Environmental Toxicology, University of California at Davis, California, USA;

    Department of Environmental Toxicology, University of California at Davis, California, USA;

    Department of Environmental Toxicology, University of California at Davis, California, USA;

    Elkhorn Slough National Estuarine Research Reserve, Watsonville, CA, USA;

    Resources Conservation District of Monterey County, California, USA;

    Department of Environmental Toxicology, University of California at Davis, California, USA;

  • 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
  • 关键词

    agriculture; pesticides; treatment systems; toxicity;

    机译：农业;农药;处理系统;毒性;

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