Research Chemist, Office of Research and Development, National Exposure Research Laboratory-Environmental Sciences Division, U.S. Environmental Protection Agency, Las Vegas, Nevada 89119, United States.
J Agric Food Chem. 2010 Nov 24;58(22):11568-73. doi: 10.1021/jf1028152. Epub 2010 Oct 21.
Studies have shown the detection of emerging contaminants (ECs), of which pharmaceuticals are a subset, in surface waters across the United States. The objective of this study was to develop methods, and apply them, to evaluate the potential for food chain transfer when EC-containing waters are used for crop irrigation. Greenhouse experiments were performed in which select food crops were irrigated with water spiked with three antibiotics. Field experiments, at two different sites, were conducted. Select crops were irrigated with wastewater effluent known to contain ECs, EC-free well water, and Colorado River water containing trace-level ECs. The results of the greenhouse studies show the potential for uptake of one or more of the antibiotics evaluated, albeit at very low levels. In those food crops watered with wastewater effluent, only an industrial flavoring agent, N,N'-dimethylphenethylamine (DMPEA), was consistently found. None of the evaluated contaminants were found in crops irrigated with Colorado River water.
研究表明，在美国各地的地表水中都检测到了新兴污染物（ECs），其中包括一部分药品。本研究的目的是开发方法，并将其应用于评估当含有 EC 的水用于作物灌溉时食物链转移的潜力。进行了温室实验，其中用三种抗生素污染的水灌溉了选择的食用作物。在两个不同的地点进行了田间实验，用含有 EC 的废水、不含 EC 的井水和含有痕量 EC 的科罗拉多河水灌溉了选择的作物。温室研究的结果表明，尽管水平很低，但评估的抗生素之一或多种可能被吸收。在那些用废水灌溉的农作物中，只发现了一种工业调味剂 N,N'-二甲基苯乙胺（DMPEA）。在用科罗拉多河水灌溉的农作物中，没有发现任何评估的污染物。
