Department of Environmental Health, Occupational Health and Toxicology, University of Nebraska Medical Center, Omaha, NE 68198, USA.
Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583-0726, USA.
Int J Environ Res Public Health. 2021 Dec 15;18(24):13241. doi: 10.3390/ijerph182413241.
Recent studies observed a correlation between estrogen-related cancers and groundwater atrazine in eastern Nebraska counties. However, the mechanisms of human exposure to atrazine are unclear because low groundwater atrazine concentration was observed in counties with high cancer incidence despite having the highest atrazine usage. We studied groundwater atrazine fate in high atrazine usage Nebraska counties. Data were collected from Quality Assessed Agrichemical Contaminant Nebraska Groundwater, Parameter-Elevation Regressions on Independent Slopes Model (PRISM), and water use databases. Descriptive statistics and cluster analysis were performed. Domestic wells (59%) were the predominant well type. Groundwater atrazine was affected by well depth. Clusters consisting of wells with low atrazine were characterized by excessive groundwater abstraction, reduced precipitation, high population, discharge areas, and metropolitan counties. Hence, low groundwater atrazine may be due to excessive groundwater abstraction accompanied by atrazine. Human exposure to atrazine in abstracted groundwater may be higher than the estimated amount in groundwater.
最近的研究观察到，在内布拉斯加州东部的县，雌激素相关癌症与地下水中的莠去津之间存在关联。然而，人类接触莠去津的机制尚不清楚，因为尽管使用量最高，但在癌症发病率较高的县，地下水莠去津浓度却较低。我们研究了高莠去津使用量的内布拉斯加州县的地下水莠去津归宿。数据来自质量评估农用化学污染物内布拉斯加州地下水、独立坡度参数回归模型 (PRISM) 和水利用数据库。进行了描述性统计和聚类分析。民用水井（59%）是主要的水井类型。地下水莠去津受到水井深度的影响。由低莠去津水井组成的聚类特征是地下水过度抽取、降水减少、人口多、排水区和大都市县。因此，地下水莠去津浓度低可能是由于过度抽取地下水伴随莠去津造成的。人类从抽取的地下水中接触莠去津的量可能高于地下水估计量。
