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水力压裂的毒性和无机成分的空间和时间变化回流和产生的水

Connor B Stewart¹, Hannah M Lowes¹, W Tyler Mehler¹

¹Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada.

Journal of hazardous materials

|September 13, 2023

概括

水力压裂的回流和产生的水 (FPW) 在组成和毒性方面具有很大的变化. 盐度是FPW水生有毒性的主要驱动因素,使风险评估复杂化.

科学领域:

环境科学环境科学
地质化学地质化学
生态毒理学生态毒理学

背景情况:

水力压裂产生了大量的废水 (FPW),含有高盐度和污染物.
了解FPW的组成对于环境风险评估至关重要.

研究的目的:

分析FPW无机成分的空间和时间变化.
评估FPW对水生生物的毒性,并确定关键驱动因素.

主要方法:

在不同时间点收集了两种地质构成的十个井的FPW样本.
分析了无机成分,并对Daphnia magna进行了毒理学测试.
相关的FPW组成与观察到的毒性.

主要成果:

在FPW的组成在空间和时间上有显著的变化,在形成的内部和之间.
随着时间的推移,由盐度元素 (Cl,Na,Ca,Mg,K) 驱动的总溶解固体增加.
FPW对大方的毒性具有很高的变异性 (LC50: 1.16%13.7%),与盐度有很强的相关性.

结论:

FPW的成分高度异质,因此很难预测其对环境的影响.
盐度是FPW水生毒性的主要决定因素,尽管有机成分也会有所贡献.
这种变化凸显了与石油和天然气废水相关的风险管理和减轻的挑战.

关键词:

组成构成构成达夫尼亚大 (Daphnia magna) 是一个大的植物.回流和产生的水.无机有机无机时间空间的变化.

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