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Ecological assessment of coal mine and metal mine drainage in South Korea using Daphnia magna bioassay

机译:利用Daphnia magna生物分析法对韩国煤矿和金属矿山排水进行生态评价。

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摘要

In order to assess the ecological effect of acid mine drainage, metal mine (Dalsung) and coal mine (Samtan) drainage in South Korea were collected. The each mine drainage then investigated by whole effluent toxicity test (WET) and toxicity identification evaluation (TIE). WET results demonstrated that DS leachate and ST mine water is more toxic than other mine drainage due to the presence of cationic metals and acidic pH. TIE results revealed that the acidic pH and copper (Cu) could be the main toxicants in both mine drainage. The strong acidic pH (pH < 3.5) enhanced the metal toxicity by increase of metal activity and bioavailability. The toxicity of most mine drainage revealed that the positive correlation between metal concentration and toxicity unit (TU). The regression data between TU and sum of cumulative criterion unit (CCU) demonstrated the reasonable statistical significance (R = 0.89; p < 0.01), however the excessive iron concentration in mine drainage could be an inhibition factor to estimate the toxicity by the effect of amorphous iron precipitate.
机译:为了评估酸性矿山排水的生态效应,收集了韩国的金属矿山(Dalsung)和煤矿矿山(Samtan)。然后,通过整体废水毒性测试(WET)和毒性鉴定评估(TIE)对每个矿山排水进行调查。 WET结果表明,由于存在阳离子金属和酸性pH,DS渗滤液和ST矿井水比其他矿井排水更具毒性。 TIE结果表明,酸性pH和铜(Cu)可能是矿山排水中的主要毒物。强酸性pH(pH <3.5)通过增加金属活性和生物利用度来增强金属毒性。大多数矿井排水系统的毒性表明,金属浓度与毒性单位(TU)之间呈正相关。 TU与累积标准单元总和(CCU)之间的回归数据显示出合理的统计显着性(R = 0.89; p <0.01),但是矿井排水中过量的铁浓度可能是通过以下影响评估毒性的抑制因素:无定形铁沉淀。

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