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首页> 外文期刊>Environmental Science & Technology >Transport and Modeling of Estrogenic Hormones in a Dairy Farm Effluent through Undisturbed Soil Lysimeters
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Transport and Modeling of Estrogenic Hormones in a Dairy Farm Effluent through Undisturbed Soil Lysimeters

机译：通过原状土壤溶渗仪在奶牛场废水中运输和模拟雌激素

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摘要

The presence of endocrine-disrupting chemicals, including estrone (E1) and 17β-estradiol (E2), in surface waters has been associated with physiological dysfunction in a number of aquatic organisms. One source of surface and groundwater contamination with E1 and E2 is the land application of animal wastes. The processes involved in the transport of these hormones in the soil, when applied with animal wastes, are still unclear. Therefore, a field-transport experiment was carried out, where a dairy farm effluent spiked with E1 and E2 was applied on large (50 cm diameter and 70 cm depth) undisturbed soil lysimeters. The concentrations of E1 and E2 in the leachate were monitored over a 3-month period, during which irrigation was applied. The experimental data suggest that E1 and E2 were transported through preferential/macropore flow pathways. The data from the experiment also show that E1 and E2 are leached earlier than the inert tracer (bromidel. This observation can be explained either by the presence of antecedent concentrations in the soil or by an enhanced transport of E1 and E2through the soil. A state-space mixing-cell model was further developed in order to describe the transport of E1 and E2 by three transport processes in parallel. The inverse modeling of the leaching data did not support the hypothesis that antecedent concentrations of estrogens could be responsible for the observed breakthrough curves but confirmed that estrogens were transported mainly via preferential/ macropore flow and also via an enhanced transport The parameter values that characterized this enhanced transport strongly suggest that this enhanced transport is mediated by colloids. For the first time, the simultaneous transport of E1 and E2 was modeled under transient conditions, taking into account the advection-dispersion, preferential/macropore flow, and colloidal-enhanced transport processes as well as E1 and E2 dissipation in the soil. These findings have major implications in terms of management practices to decrease E1 and E2 transport and water contamination.
机译：在地表水中存在破坏内分泌的化学物质，包括雌酮（E1）和17β-雌二醇（E2），已与许多水生生物的生理功能障碍有关。 E1和E2污染地表和地下水的一个原因是动物粪便的土地应用。与动物粪便一起使用时，这些激素在土壤中的运输过程尚不清楚。因此，进行了田间运输实验，将掺有E1和E2的奶牛场废水应用于大面积（直径50厘米，深度70厘米）原状土壤溶渗仪。在三个月的时间内监测渗滤液中E1和E2的浓度，在此期间进行灌溉。实验数据表明E1和E2是通过优先/大孔流动路径运输的。实验数据还表明，E1和E2的浸出要比惰性示踪剂（溴化物）早。该观察结果可以通过土壤中前浓度的存在或通过土壤中E1和E2的增强运输来解释。为了进一步描述E1和E2通过三个传输过程的并行传输，进一步发展了空间混合细胞模型，浸出数据的逆向建模不支持以下假设：雌激素的前浓度可能是所观察到的突破的原因。曲线，但证实了雌激素主要通过优先/大孔流动以及通过增强的运输来进行运输表征这种增强的运输的参数值强烈表明，这种增强的运输是由胶体介导的。是在瞬态条件下建模的，其中考虑了对流弥散，preferential / mac孢子流动，胶体增强的运输过程以及E1和E2在土壤中的消散。这些发现对减少E1和E2运输以及水污染的管理实践具有重大意义。

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  • 来源
    《Environmental Science & Technology》 |2010年第7期|p.2341-2347|共7页
  • 作者

    LAURE D. STEINER; VINCENT J. BIDWELL; HONG J. DI; KEITH C. CAMERON; GRANT L. NORTHCOTT;

  • 作者单位

    Centre for Soil and Environmental Quality, P.O. Box 84, Lincoln University, Lincoln 7647, Christchurch, New Zealand;

    Lincoln Ventures Ltd., P.O. Box 133, Lincoln 7640, Christchurch, New Zealand;

    Centre for Soil and Environmental Quality, P.O. Box 84, Lincoln University, Lincoln 7647, Christchurch, New Zealand;

    Centre for Soil and Environmental Quality, P.O. Box 84, Lincoln University, Lincoln 7647, Christchurch, New Zealand;

    Plant and Food Research, Ruakura, Private Bag 3213, Hamilton, New Zealand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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