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首页> 外文期刊>Environmental toxicology and chemistry >COMPARATIVE ACUTE TOXICITY OF A SYNTHETIC MINE EFFLUENT TO CERIODAPHNIA DUBIA, LARVAL FATHEAD MINNOW AND THE FRESHWATER MUSSEL ANODONTA IMBECILIS
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COMPARATIVE ACUTE TOXICITY OF A SYNTHETIC MINE EFFLUENT TO CERIODAPHNIA DUBIA, LARVAL FATHEAD MINNOW AND THE FRESHWATER MUSSEL ANODONTA IMBECILIS

机译：合成矿山废水对鹿角藻，小白头MIN和淡淡淡淡的无鞭毛无脊椎动物的比较急性毒性

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To determine if water quality-based effluent limitations recommended for a proposed discharger would provide adequate protection of aquatic life, site-specific acute toxicity tests were performed. The proposed discharger studied was a mine to be located in northern Wisconsin. The mine's discharge would flow into the Flambeau River, a relatively pristine river that harbors endangered freshwater mussels. The toxicity effects of synthetic effluents, representing a mixture of five different metals under contrasting conditions of hardness, were tested on several different organisms. Results indicated that Ceriodaphnia dubia exhibited a much greater sensitivity to various mixtures of cadmium, hexavalent chromium, copper, nickel, and zinc than did either larval fathead minnows (Pimephalespromelas) or the freshwater mussel Anodonta imbecilis. Mixtures of metals at the permitted discharge levels of individual metals were also found to be consistently toxic to C. dubia. Because C. dubia was found to be much more sensitive than A. imbecilis, an effluent safe for C. dubia should also be safe for A. imbecilis and the physiologically similar endangered mussels found in the river. Based on such testing, aquatic life toxicity-testing conditions and criteria suggested for the National Pollution Discharge Elimination System (NPDES) permit should be protective of C. dubia and, hence, other aquatic life such as endangered mussels. Overall, effluent limitations for proposed dischargers need to be based on the combined effect of complex effluents. Aquatic toxicity testing using synthetic effluents that approximate the expected discharge characteristics provides a viable approach to determining the limits for proposed dischargers of multiple pollutants.
机译：为了确定建议的排放者所建议的基于水质的污水排放限制是否可以为水生生物提供足够的保护，我们进行了针对特定地点的急性毒性试验。拟议中的放电器是位于威斯康星州北部的一处矿山。矿山的排放物将流入Flambeau河，这是一条相对原始的河，其中蕴藏着濒临灭绝的淡水贻贝。在几种不同的生物体上测试了代表五种不同金属在不同硬度条件下的混合物的合成废水的毒性作用。结果表明，与幼虫黑头min鱼（Pimephalespromelas）或淡水贻贝Anodonta imbecilis相比，杜鹃花对镉，六价铬，铜，镍和锌的各种混合物表现出更高的敏感性。还发现在允许的单个金属排放水平下，金属混合物始终对杜仲梭菌有毒。由于发现杜比角藻比灵芝对链霉菌的敏感性要高得多，因此对杜氏梭菌的流出物安全的对链藻菌和在河中发现的生理相似的濒危贻贝也应是安全的。根据此类测试，为国家污染排放消除系统（NPDES）许可证建议的水生生物毒性测试条件和标准应保护杜氏梭菌，并因此保护其他水生生物，例如濒危贻贝。总体而言，对拟议排放者的污水排放限制应基于复杂污水的综合影响。使用接近预期排放特性的合成废水进行水生毒性测试，为确定拟议的多种污染物排放者的限值提供了一种可行的方法。

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