Department of Chemistry, National University of Comahue, Neuquen, Argentina.
J Environ Sci Health B. 2011;46(8):662-70. doi: 10.1080/03601234.2012.592051.
An assessment of the off-site migration of pesticides from agricultural activity into the environment in the Neuquen River Valley was performed. The aim of this study was to evaluate the distribution of pesticides in several compartments of a small agricultural sub-catchment. Soil, surface water, shallow groundwater and drift deposition were analyzed for pesticide residues. Results showed the presence of some pesticide residues in soil, surface water and shallow groundwater compartments. The highest detection frequencies in water (surface and subsurface) were found for azinphos-methyl and chlorpyrifos (>70%). In terms of concentration, the highest levels were observed in shallow groundwater for azinphos methyl (22.5 μg/L) and carbaryl (45.7 μg/L). In the soil, even before the application period had started, accumulation of residues was present. These residues increased during the period studied. Spray drift during pesticide application was found to be a significant pathway for the migration of pesticide residues in surface water, while leaching and preferential flows were the main transport routes contributing to subsurface contamination.
对新奎那河河谷农业活动中农药的场外迁移对环境的影响进行了评估。本研究的目的是评估小农业子流域内几个隔室中农药的分布情况。对土壤、地表水、浅层地下水和飘移沉积进行了农药残留分析。结果表明，土壤、地表水和浅层地下水中存在一些农药残留。在水中（地表水和地下水）检测到的最高农药残留频率为毒死蜱和氯氰菊酯（>70%）。就浓度而言，在浅层地下水中，甲拌磷（22.5μg/L）和西玛津（45.7μg/L）的含量最高。在土壤中，甚至在施药期开始之前，就已经存在农药残留的积累。在研究期间，这些残留量增加了。在施药期间，喷雾漂移是农药残留向地表水迁移的一个重要途径，而淋溶和优先流是造成地下水污染的主要运移途径。
