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首页> 外文期刊>Journal of environmental science and health >Leaching of seven pesticides currently used in cotton crop in Mato Grosso State-Brazil
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Leaching of seven pesticides currently used in cotton crop in Mato Grosso State-Brazil

机译：巴西马托格罗索州目前棉花作物中使用的七种农药的浸出

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This study aimed to evaluate the leaching of pesticides and the applicability of the Attenuation Factor (AF) Model to predict their leaching. The leaching of carbofuran, carbendazim, diuron, metolachlor, α and β endosulfan and chlorpyrifos was studied in an Oxisol using a field experiment lysimeter located in Dom Aquino - Mato Grosso. The samples of percolated water were collected by rain event and analyzed. Chemical and physical soil attributes were determined before pesticide application to the plots. The results showed that carbofuran was the pesticide that presented a higher leaching rate in the studied soil, so was the one representing the highest contamination potential. From the total carbofuran applied in the soil surface, around 6 % leached below 50 cm. The other pesticides showed lower mobility in the studied soil. The calculated values to AF were 7.06E-12 (carbendazim), 5.08E-03 (carbofuran), 3.12E-17 (diuron), 6.66E-345 (α-endosulfan), 1.47E-162 (β-endosulfan), 1.50E-06 (metolachlor), 3.51E-155 (chlorpyrifos). AF Model was useful to classify the pesticides' potential for contamination; however, that model underestimated pesticide leaching.
机译：这项研究旨在评估农药的浸出以及衰减因子（AF）模型预测其浸出的适用性。使用位于Dom Aquino-Mato Grosso的现场溶渗仪，在Oxisol中研究了呋喃丹，多菌灵，杜隆，异丙甲草胺，α和β硫丹和毒死rif的浸出。通过降雨事件收集渗透水样品并进行分析。在将农药施用到样地之前确定化学和物理土壤属性。结果表明，在研究的土壤中，呋喃丹是一种具有较高浸出率的农药，因此具有最高污染潜能的农药也是如此。从土壤表面施用的总呋喃丹中，约有6％浸出至50 cm以下。其他农药在研究的土壤中显示出较低的迁移率。 AF的计算值是7.06E-12（多菌灵），5.08E-03（卡夫呋喃），3.12E-17（敌草隆），6.66E-345（α-硫丹），1.47E-162（β-硫丹）， 1.50E-06（异丙甲草胺），3.51E-155（毒死rif）。 AF模型有助于对农药的潜在污染进行分类。但是，该模型低估了农药的浸出。

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