土壤性质对纯和配方麦草畏在潴育土（法国多姆山省利马尼平原）上吸附的影响。
Effect of soil properties on pure and formulated mesotrione adsorption onto vertisol (Limagne plane, Puy-de-Dôme, France).
机构信息
Clermont Université, Université Blaise Pascal, ICCF, UMR-CNRS 6296, BP 80026, F-63171 Aubière Cedex, France; Institute Physical, Chemical and Biological Problems of Soil Science, Russian Academy of Sciences, Pushchino, Russia.
Lomonosov University, Faculty of Chemistry, Moscow, Russia.
出版信息
Chemosphere. 2014 Sep;111:177-83. doi: 10.1016/j.chemosphere.2014.03.061. Epub 2014 Apr 22.
The fate of ionisable pesticides in the environment is complex as it is importantly related to many soil properties: pH, mineralogy, organic matter content and other soil characteristics. The adsorption of a weak acid herbicide, mesotrione, was studied in detail on whole and peroxide-treated vertisol topsoil and also on its granulometric fractions (clay, silt, sand) to evaluate the role of mineralogy and different organic matter pools. The soil studied is alkaline silty loam with smectite as the main clay mineral. It contains 1.7% organic carbon, mostly stabilized as a complex with smectite. Humus is of fulvic type. Mesotrione adsorption occurs on both mineral and organic constituents. Adsorption is weak and mesotrione can be easily and totally desorbed. As shown with (13)C NMR experiments, adsorption best correlates with the alkyl and carboxylic carbon content, and occurs on both bound and free organic matter. No difference of mesotrione sorption was observed with the formulation Callisto®.
离子态农药在环境中的命运较为复杂，因为它与许多土壤特性密切相关：pH 值、矿物学、有机质含量和其他土壤特征。本文详细研究了弱酸性除草剂麦草畏在原状和过氧化物处理的变性土表土以及其粒度分级（粘土、粉砂、砂）上的吸附情况，以评估矿物学和不同有机质库的作用。研究的土壤为碱性粉质壤土，主要粘土矿物为蒙脱石。土壤含有 1.7%的有机碳，主要与蒙脱石形成复合物而稳定。腐殖质为富啡酸型。麦草畏的吸附既发生在矿物成分上，也发生在有机成分上。吸附较弱，麦草畏容易且完全解吸。如（13）C NMR 实验所示，吸附与烷基和羧酸碳含量相关性最好，且发生在结合态和游离态有机质上。使用 Callisto®制剂时，麦草畏的吸附没有差异。
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