Pesticides’ degradation in the environment affects their persistence and their environmental impact. In this study, batch experiments are performed to investigate 1) the adsorption of a fungicide, metalaxyl, and its main acid metabolite (CGA 62828) onto the surface of two different soils collected in the metal‐contaminated bay of an industrial area and 2) the influence of these two molecules on the leaching of soluble bases, iron and zinc, from the studied soils. In ultrapure water, adsorption isotherms show that the amount of CGA 62828 adsorbed by the soil particles are higher than the amount of metalaxyl. Furthermore, higher amount of these two molecules are adsorbed at a slower rate by the well‐drained soil in comparison with the more polluted saline anthroposol. In contrary to metalaxyl, CGA 62828 favors the release of the bases K, Na, and Ca by the saline soil in contact with ultrapure water. CGA 62828 also tends to limit the Fe and Zn release which are favored in the presence of metalaxyl. The composition of the local tap water did not significantly influence the adsorbed quantities of metalaxyl and CGA 62828 despite its impact on the Fe and Zn leaching.

中文翻译：

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甲霜灵和CGA 62828的吸附对金属污染土壤淋溶行为的影响

农药在环境中的降解会影响其持久性及其对环境的影响。在这项研究中，进行了批量实验以研究1）杀菌剂，甲霜灵及其主要酸代谢物（CGA 62828）在工业区的金属污染海湾中收集的两种不同土壤的表面上的吸附和2）这两个分子对研究土壤中可溶性碱（铁和锌）的浸出的影响。在超纯水中，吸附等温线表明，土壤颗粒吸附的CGA 62828的量高于甲霜灵的量。此外，与污染较严重的盐水蒽酚相比，排水良好的土壤对这两种分子的吸附速度较慢。与甲霜灵相反，CGA 62828支持释放碱K，Na，钙则由盐渍土壤与超纯水接触。CGA 62828还倾向于限制Fe和Zn的释放，这在甲霜灵的存在下是有利的。尽管自来水的成分对Fe和Zn的浸出有影响，但其组成并没有显着影响甲霜灵和CGA 62828的吸附量。