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首页> 外文期刊>Journal of environmental science and health >Soil Column Experiments Used As A Means To Assess Transport, Sorption, And Biodegradation Of Pesticides In Groundwater
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Soil Column Experiments Used As A Means To Assess Transport, Sorption, And Biodegradation Of Pesticides In Groundwater

机译：土柱实验作为评估农药在地下水中的迁移，吸附和生物降解的手段

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摘要

Soil column experiments are used to investigate the fate of three pesticides of high, intermediate, and low solubility in groundwater: N-phosphonomethyl glycine (glyphosate); 0,0-diethyl-S-[(ethylthio)metnyl]phosphorodithioate (phorate); (2,4-dichlorophenoxy)acetic acid (2,4-D). Feed solutions are prepared by adding each pesticide (100 mg/L glyphosate, 50 μg/L phorate, 50 mg/L 2,4-D) along with conservative tracer, KBr, in synthetic groundwater. The concentration of the pesticides in effluents is detected by ion chromatography (glyphosate, 2,4-D) and GC-FID (phorate). The Br~- breakthrough curves are employed to estimate the dispersion coefficient and mean pore velocity in each column. Solute transport and reactive models accounting for equilibriumon-equilibrium sorption and biodegradation are coupled with inverse modeling numerical codes to estimate the kinetic parameters for all pesticides.
机译：土壤柱实验用于研究三种高，中，低水溶性农药在地下水中的命运：N-膦酰基甲基甘氨酸（草甘膦）； 0,0-二乙基-S-[（（乙硫基）亚甲基]]二硫代磷酸酯（磷酸酯）; （2，4-二氯苯氧基）乙酸（2，4-D）。通过在合成地下水中添加每种农药（100 mg / L草甘膦，50μg/ L磷酸盐，50 mg / L 2,4-D）以及保守示踪剂KBr来制备饲料溶液。废水中农药的浓度通过离子色谱法（草甘膦，2,4-D）和GC-FID（磷酸根）检测。利用Br〜-突破曲线估算每根色谱柱的分散系数和平均孔速。考虑到平衡/非平衡吸附和生物降解的溶质运移和反应模型与逆模型数字代码相结合，以估算所有农药的动力学参数。

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