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使用单个物种和整个社区流的中宇宙暴露来识别模仿资源开采废水剂量的主要离子效应

Christopher T Nietch¹, Nathan J Smucker¹, Leslie Gains-Germain²

¹USEPA Office of Research and Development, Center for Environmental Measurement and Modeling, 26W Martin Luther King Drive, Cincinnati, OH 45268, USA.

Water

|January 25, 2024

概括

来自资源开采的废水对河流生态系统的影响不同. 山顶采矿泄漏物比深井盐水更有毒,影响了无脊椎动物群落和生产. 低于300μS/cm的特定导电率显示了最小的生态变化.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
水生生态学水生生态学

背景情况:

来自内陆资源开采的废水,如天然气井和山顶采矿,具有高离子度和可变组成.
这种离子变异性使流生态系统的风险评估和管理变得复杂.
了解不同类型的废水对生态的影响对于有效的环境保护至关重要.

研究的目的:

为了比较两种不同的废水类型的生态风险:深井盐水 (DWB) 和山顶采矿 (MTM) 泄漏物.
为了确定暴露在这些废水中的溪流周边生物和无脊椎动物群体的剂量反应关系.
根据水的化学参数,如特定导电性,建立生态影响的门.

主要方法:

进行了为期43天的流中宇宙实验,使用两个废水配方 (DWB和MTM) 在100至2000毫克/升的总溶解固体 (TDS) 度下进行.
殖民藻类周围生物和盆地无脊椎动物被评估为分类,社区组合,初级和二级生产的变化.
响应灵敏度分布 (RSD) 和危害度 (HCs) 计算,并进行单个物种毒性测试.

主要成果:

山顶采矿 (MTM) 液显著减少了二次生产,甚至在低度下也改变了无脊椎动物组合.
深井盐水 (DWB) 在中间剂量时的影响最小,只有最高剂量会对某些生态产生负面影响.
两种废水类型都显示出对生态变化的潜力,但在300μS/cm的特定导电率以下,显著影响的可能性较小.

结论:

由于高毒性,山顶采矿泄漏物对流生态系统的生态风险比深井盐水更大.
300μS/cm的特定导电性基准似乎是保护河流生态免受这些类型的废水的相关门.
在中等宇宙中对剂量反应的评估为复杂的工业废水的生态风险提供了宝贵的见解.

关键词:

马塞卢斯页岩是一种页岩.藻类周边生物 (algal periphyton) 是一种藻类周边生物.离子强度的离子强度它们是中宇宙 (mesocosms).山顶采矿的山顶采矿活动周围的 (periphyton) 是一个周围的.盐度盐度盐度盐度盐度特定导电性的特定导电性.河流的无脊椎动物总溶解的固体总量水的质量水的质量.

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