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在寒冷条件下,通过透的反应性屏障从合成地雷冲击水中去除多重污染物

Morgane Desmau¹, Elliott K Skierszkan², Gladys Oka³

¹Northern Mine Remediation Research Program, Yukon University Research Center, 500 University Drive, PO Box 2799, Whitehorse, YT, Y1A 5K4, Canada; Department of Chemistry and Biochemistry, Université de Moncton, Moncton, NB, E1A 3E9, Canada.

|June 15, 2025

概括

透反应屏障在处理寒冷气候的矿山水方面显示出前景. 零价值铁有效地去除了和,但酸盐的去除和的稳定性需要进一步研究.

科学领域:

环境工程环境工程
地质化学地质化学
环境微生物学环境微生物学

背景情况:

透反应屏障 (PRBs) 在温带气候下有效地对地下水进行修复.
低温的亚北极条件可以抑制关键的生物地球化学反应,质疑PRB的有效性.
矿山影响的水通常含有酸盐,和等多种污染物.

研究的目的:

评价不同零价值铁 (ZVI) 含量的基板级PRB在5°C处理合成矿山水时的性能.
调查乙酸盐修改对微生物活动和污染物去除的影响.
了解控制,酸盐和去除和潜在动员的地球化学机制.

主要方法:

用ZVI,石和木片模拟PRB的长板尺度柱体实验.
处理含有酸盐,和的合成矿泉水,在5°C下进行36周的处理.
在20至33周期间进行乙酸盐修改以刺激微生物活动.
使用X射线吸收光谱和PHREEQC建模进行特异化分析.

主要成果:

在所有带有ZVI的柱子中,的去除率超过95%,主要是通过吸附和共降.
在乙酸盐修改过程中,酸盐去除从有限改善到~50%,但脱是不完整的.
去除率最初>95%,但由于与Ca和CO3.3的复杂化,在乙酸盐修改过程中重新调动.

结论:

在寒冷的气候下,PRB技术显示了多污染物地下水修复的潜力.
同时去除具有相反地化学行为的污染物会带来挑战.
需要进一步的研究来优化PRB设计,以便在亚北极环境中持续清除污染物.

关键词:

亚是一种.亚酸盐是一种酸盐.被动治疗是一种被动的治疗.整治整治整治整治是一种.

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