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首页> 外文会议>International Conference on Wetlands amp; Remediation Salt Lake City, Utah, November 16-17, 1999 >Sediment contaminants of the salton sea
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Sediment contaminants of the salton sea

机译：萨尔顿海的沉积物污染物

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This study was the first comprehensive study to evaluate the distribution of sediment types and sediment contaminants throughout the Sea. This study included collection of sediment samples from 73 locations. This sampling effort encompassed the entire Sea plus its three main tributaries. The agricultural runoff which keeps the Sea alive is loaded with salts, pesticides, selenium, and other metals. Chemicals found at elevated concentrations and of potential ecological concern were cadmium, copper, molybdenum, nickel, zinc, and selenium. The most significant chemical of concern was selenium, which was limited to the upper 30 centimeters of sediment. Acetone, 2-butanone, and carbon disulfide were also widespread but appeared to be associated with natural biological processes within the sediments. One of the most significant findings of this study was the absence of elevated concentrations of organic chemicals commonly used in agriculture earlier this century, such as DDT. It appears that natural processes within the Sea may be responsible for removal of these contaminants from the water column and degradation of pesticides within sediments.
机译：这项研究是第一个评估整个海洋中沉积物类型和沉积物污染物分布的综合研究。这项研究包括从73个地点收集沉积物样品。采样工作涵盖了整个海洋及其三个主要支流。使海洋保持生命的农业径流中充满了盐，农药，硒和其他金属。浓度较高且可能引起生态关注的化学物质为镉，铜，钼，镍，锌和硒。最令人关注的化学物质是硒，硒被限制在沉积物的上部30厘米。丙酮，2-丁酮和二硫化碳也很普遍，但似乎与沉积物中的自然生物过程有关。这项研究最重要的发现之一是，本世纪初农业中常用的有机化学品（如滴滴涕）的浓度没有升高。看来，海洋内部的自然过程可能是造成这些污染物从水柱中去除以及农药在沉积物中降解的原因。

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