草甘膦是一种广泛应用的氨基多膦络合剂的转化产物

IF 15.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Anna M. Röhnelt, Philipp R. Martin, Mathis Athmer, Sarah Bieger, Daniel Buchner, Uwe Karst, Carolin Huhn, Torsten C. Schmidt, Stefan B. Haderlein
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引用次数: 0

摘要

二乙烯三胺五亚膦酸酯(DTPMP)和相关的氨基多膦酸酯(APPs)被广泛用作家庭和工业应用的螯合剂。最近的研究表明,APP的排放与欧洲地表水中除草剂草甘膦含量的升高有关。然而,app在环境中的转化过程和产品在很大程度上是未知的。我们发现,在纯水和废水中,DTPMP与锰在接近中性的pH值下反应生成草甘膦。溶解的Mn2+和O2或悬浮的MnO2形成草甘膦,在DTPMP完全转化后草甘膦保持稳定。草甘膦产率随反应条件的变化而变化,最高可达0.42 mol%。天然水体和废水系统中普遍存在的锰强调了锰驱动的DTPMP转化作为水生系统中草甘膦的一个以前被忽视的来源的潜在重要性。这些发现挑战了目前除草剂应用作为草甘膦污染的唯一来源的范式,并有必要重新评估水资源保护策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Glyphosate is a transformation product of a widely used aminopolyphosphonate complexing agent

Glyphosate is a transformation product of a widely used aminopolyphosphonate complexing agent

Diethylenetriamine penta(methylenephosphonate) (DTPMP) and related aminopolyphosphonates (APPs) are widely used as chelating agents in household and industrial applications. Recent studies have linked APP emissions to elevated levels of the herbicide glyphosate in European surface waters. However, the transformation processes and products of APPs in the environment are largely unknown. We show that glyphosate is formed from DTPMP by reaction with manganese at near neutral pH in pure water and in wastewater. Dissolved Mn2+ and O2 or suspended MnO2 lead to the formation of glyphosate, which remains stable after complete DTPMP conversion. Glyphosate yields vary with the reaction conditions and reach up to 0.42 mol%. The ubiquitous presence of manganese in natural waters and wastewater systems underscores the potential importance of Mn-driven DTPMP transformation as a previously overlooked source of glyphosate in aquatic systems. These findings challenge the current paradigm of herbicide application as the sole source of glyphosate contamination and necessitate a reevaluation of water resource protection strategies.

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来源期刊
Nature Communications
Nature Communications Biological Science Disciplines-
CiteScore
24.90
自引率
2.40%
发文量
6928
审稿时长
3.7 months
期刊介绍: Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.
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