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首页> 外文期刊>Archives of Environmental Contamination and Toxicology >The Evaluation of Metal Retention by a Constructed Wetland Using the Pulmonate Gastropod Helisoma trivolvis (Say)
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The Evaluation of Metal Retention by a Constructed Wetland Using the Pulmonate Gastropod Helisoma trivolvis (Say)

机译：使用肺腹足动物Helisoma trivolvis对人工湿地中的金属保留进行评估（说）

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Constructed wetlands are built because they can act as sinks for many pollutants, thereby protecting the water quality of downstream ecosystems. The treatment performance is generally assessed using mass balance calculations. Along with the mass balance approach, we compared the metal content of populations of a common pond snail (Helisoma trivolvis Say) collected upstream and downstream of a 3-year-old constructed wetland. Snails were collected in early May, June, and August 1998. At the same time, water samples for particulate and dissolved metals were taken every 3 days for the duration of the experiment. Overall, the wetland retained most dissolved metals, including Fe, Mn, Cu, Zn, Ni, and Pb, but released dissolved As. However, the wetland released particulate Fe and Mn. With the exception of Zn, the metal concentrations of the downstream snails were on average higher than those measured in the upstream population. The higher metal content of downstream snails was likely related to the significant export of particulate metals by the wetland, despite the overall retention of dissolved metals. This study points to the need for biological as well as chemical monitoring to determine the treatment efficiency and toxicological risk associated with constructed wetlands.
机译：之所以建造人工湿地是因为它们可以充当许多污染物的汇，从而保护下游生态系统的水质。通常使用质量平衡计算来评估治疗效果。与质量平衡方法一起，我们比较了一个3岁人工湿地上游和下游收集的普通池塘蜗牛（Helisoma trivolvis Say）种群的金属含量。在1998年5月，6月和1998年8月上旬收集了蜗牛。同时，在实验过程中每3天采集一次颗粒和溶解金属的水样。总体而言，湿地保留了大多数溶解的金属，包括铁，锰，铜，锌，镍和铅，但释放了溶解的砷。但是，湿地释放出颗粒状的铁和锰。除锌外，下游蜗牛的金属浓度平均高于上游种群中的金属浓度。尽管溶解的金属总体保留下来，但下游蜗牛的金属含量较高可能与湿地大量出口颗粒金属有关。这项研究指出有必要进行生物学和化学监测以确定与人工湿地有关的处理效率和毒理学风险。

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    R. R. Goulet; E. N. Leclair; F. R. Pick;

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    Ottawa-Carleton Institute of Biology University of Ottawa 30 Marie-Curie Ottawa Ontario K1N 6N5 Canada;

    Ottawa-Carleton Institute of Biology University of Ottawa 30 Marie-Curie Ottawa Ontario K1N 6N5 Canada;

    Ottawa-Carleton Institute of Biology University of Ottawa 30 Marie-Curie Ottawa Ontario K1N 6N5 Canada;

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