使用电动力学技术与生物透性反应屏障相结合的Cu和Pb受污染的溶液修复研究
Lin Wang1, Wen-Chieh Cheng1, Zhong-Fei Xue1
1School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering (XAUAT), Xi'an, 710055, China.
Journal of environmental management
|October 22, 2023
概括
一个带有生物透反应屏障的新型电动反应堆有效地修复了中的铜和,显著减少了阴极附近的污染物积累,并实现了高的去除效率.
科学领域:
- 环境工程 环境工程
- 地质化学 地质化学
- 整治技术 整治技术
背景情况:
- 电动力学 (EK) 整治对土壤清洁有希望,但受到污染物聚焦和低效率的影响.
- 现有的方法需要改进,以解决从污染土壤中去除重金属的局限性.
- 生物透反应屏障 (bio-PRBs) 提供了一种可持续的方法来增强污染物封存.
研究的目的:
- 开发和评估一个与生物PRB集成的新型EK反应器,用于修复溶解中的铜 (Cu) 和 (Pb).
- 研究酶诱导碳酸盐沉 (EICP),pH调节和氨 (NH4+) 恢复对EK整治效率的影响.
- 为了减轻阴极聚焦现象,并改善整体重金属去除.
主要方法:
- 一个新的EK反应堆设计,在中间结合了生物PRB.
- 测试了三个实验配置:CG (EICP),TG-1 (EICP + pH调节) 和TG-2 (EICP + pH调节 + NH4+恢复).
- 对Cu和Pb去除效率的量化和对聚焦现象的评估.
主要成果:
- 所有配置都改善了Cu和Pb的去除,并减少了聚焦现象.
- TG-1增强了污染物向生物PRB的迁移,提高了去除效率.
- TG-2在聚焦方面表现出最显著的减少,Cu和Pb的去除效率分别为34%和36%,并实现了~100%的NH4+回收.
结论:
- 具有集成生物PRB的新型EK反应器有效地修复Cu和Pb受污染的.
- 结合EICP,pH调节和NH4+回收 (TG-2),可以优化污染物去除并最大限度地减少聚焦.
- 这项研究表明了有效重金属整治和污染土壤资源回收的有希望的方法.
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