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首页> 外文期刊>Environmental toxicology and chemistry >Reduction of Pesticide Toxicity Under Field‐Relevant Conditions? The Interaction of Titanium Dioxide Nanoparticles,Ultraviolet, and Natural Organic Matter
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Reduction of Pesticide Toxicity Under Field‐Relevant Conditions? The Interaction of Titanium Dioxide Nanoparticles,Ultraviolet, and Natural Organic Matter

机译：在现场相关条件下减少农药毒性？二氧化钛纳米粒子，紫外线和天然有机物的相互作用

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摘要

In surface waters, the illumination of photoactive engineered nanomaterials (ENMs) with ultraviolet (UV) light triggers the formation of reactive intermediates, consequently altering the ecotoxicological potential of co-occurring organic micropollutants including pesticides due to catalytic degradation. Simultaneously, omnipresent natural organic matter (NOM) adsorbs onto ENM surfaces, altering the ENM surface properties. Also, NOM absorbs light, reducing the photo(cata)lytic transformation of pesticides. Interactions between these environmental factors impact 1) directly the ecotoxicity of photoactive ENMs, and 2) indirectly the degradation of pesticides. We assessed the impact of field-relevant UV radiation (up to 2.6 W UVA/m(2)), NOM (4 mg TOC/L), and photoactive ENM (nTiO(2), 50 mu g/L) on the acute toxicity of 6 pesticides inDaphnia magna. We selected azoxystrobin, dimethoate, malathion, parathion, permethrin, and pirimicarb because of their varying photo- and hydrolytic stabilities. Increasing UVA alone partially reduced pesticide toxicity, seemingly due to enhanced degradation. Even at 50 mu g/L, nano-sized titanium dioxide (nTiO(2)) reduced but also increased pesticide toxicity (depending on the applied pesticide), which is attributable to 1) more efficient degradation and potentially 2) photocatalytically induced formation of toxic by-products. Natural organic matter 1) partially reduced pesticide toxicity, not evidently accompanied by enhanced pesticide degradation, but also 2) inhibited pesticide degradation, effectively increasing the pesticide toxicity. Predicting the ecotoxicological potential of pesticides based on their interaction with UV light or interaction with NOM was hardly possible, which was even more difficult in the presence of nTiO(2). (c) 2020 The Authors.Environmental Toxicology and Chemistrypublished by Wiley Periodicals LLC on behalf of SETAC.
机译：在表面水域中，具有紫外线（UV）光的光活性工程化纳米材料（ENM）的照明触发反应性中间体的形成，从而改变了由于催化降解导致包括农药的共同发生的有机微量拷贝的生态毒理学潜力。同时，无毒的天然有机物（NOM）吸附到enm表面上，改变enm表面性质。此外，NOM吸收光线，减少了杀虫剂的照片（CATA）裂解的杀虫剂。这些环境因素之间的相互作用影响1）直接光照毒素，2）间接杀虫剂的劣化。我们评估了现场相关的紫外线辐射的影响（高达2.6W UVA / M（2）），NOM（4mg TOC / L）和光活性enm（ntio（2），50 mu g / l）上的急性6种杀虫剂indaphnia magna的毒性。我们选择了Azoxystrobin，Dimethoate，Malathion，Polathion，Permethrin和Pirimicarb，因为它们不同的光照和水解稳定性。仅uva仅部分地减少了农药毒性，似乎是由于增强的降解。即使在50μg/ l，纳米大小二氧化钛（ntiO（2））也减少但也增加了农药毒性（取决于所施用的农药），归因于1）更有效的降解和可能性2）光催化诱导的形成毒性副产品。天然有机物质1）部分降低农药毒性，而不是显然伴随着增强的农药降解，而且还抑制了农药降解，有效增加了农药毒性。基于它们与UV光的相互作用或与NOM的相互作用预测农药的生态毒理学潜力几乎可以在NTIO（2）存在下甚至更困难。 （c）2020作者。由于Wiley期刊LLC代表Setac的环境和化学毒理学和化学毒理学。

著录项

  • 来源
    《Environmental toxicology and chemistry》 |2020年第11期|2237-2246|共10页
  • 作者

    Luederwald Simon; Meyer Frederik; Gerstle Verena; Friedrichs Lisa; Rolfing Katrin; Schreiner Verena C.; Bakanov Nikita; Schulz Ralf; Bundschuh Mirco;

  • 作者单位

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany;

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany;

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany;

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany;

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany;

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany;

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany;

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany|Univ Koblenz Landau Eusserthal Ecosyst Res Stn Eusserthal Germany;

    Univ Koblenz Landau Inst Environm Sci iES Landau Landau Germany|Swedish Univ Agr Sci Dept Aquat Sci & Assessment Uppsala Sweden;

  • 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

    Photolysis; Photocatalysis; Titanium dioxide; Pesticide; UV radiation; Natural organic matter;

    机译：光解;光催化;二氧化钛;杀虫剂;紫外线辐射;天然有机物;

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