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首页> 外文期刊>Archives of Environmental Contamination and Toxicology >Field and laboratory assessment of a coal processing effluent in the Leading Creek Watershed, Meigs County, Ohio.
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Field and laboratory assessment of a coal processing effluent in the Leading Creek Watershed, Meigs County, Ohio.

机译：俄亥俄州迈格斯县Leading Creek流域的煤炭加工废水的现场和实验室评估。

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摘要

The U.S. Environmental Protection Agency has not recommended water quality criteria (WQC) to protect aquatic life from elevated sodium and sulfate concentrations, such as those associated with the coal-processing effluent of Meigs County Mine #31. This discharge, received by a tributary of the Leading Creek Watershed (SE Ohio), had a mean specific conductivity (SC) of 8,109 (7,750-8,750) microS/cm and total metal concentrations below acute WQC. The mean 48-h LC(50) for Ceriodaphnia dubia in the effluent was 6,713 +/- 99 microS/cm; mean 48-h survival was 44% for study sites downstream of the effluent. The best indicators of impairment used in this study were Ceriodaphnia fecundity, in situ Corbicula fluminea growth, EPT minus Hydropsychidae (richness and relative abundance), and relative Ephemeroptera abundance. Mayflies, reduced by more than 99% below the effluent, were absent from all but the furthest downstream study site. SC was strongly correlated with Corbicula growth (r = -0.9755, p = 0.0009) andEPT minus Hydropsychidae richness (r = -0.8756, p < 0.0001), suggesting the effluent was primarily responsible for biotic impairment. Our results indicated that SC levels, a measure of dissolved solids, in the Leading Creek Watershed that exceeded approximately 3,700 microS/cm impaired sensitive aquatic fauna.
机译：美国环境保护署未建议使用水质标准（WQC）来保护水生生物免受钠和硫酸盐浓度升高的影响，例如与Meigs County Mine＃31煤炭加工废水相关的标准。 Leading Creek流域（SE Ohio）的支流接收到的这种放电的平均电导率（SC）为8,109（7,750-8,750）microS / cm，总金属浓度低于急性WQC。废水中的杜鹃花的平均48小时LC（50）为6,713 +/- 99 microS / cm;在废水下游的研究地点，平均48小时生存率为44％。这项研究中使用的最佳损伤指标是紫花鱼卵繁殖力，原边Corbicula fluminea生长，EPT减去Hydropsychidae（丰富度和相对丰度）以及相对星历表丰度。除最远的下游研究地点外，所有其他地方都没有五月花，其排放量减少了99％以上。 SC与Corbicula的生长（r = -0.9755，p = 0.0009）和EPT减去水生精神科动物的丰富度（r = -0.8756，p <0.0001）密切相关，表明废水主要是造成生物损害的原因。我们的结果表明，领先溪流域中的SC水平（溶解固体的量度）超过约3,700 microS / cm损害了敏感的水生动物。

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