零价铁可渗透反应屏障钝化和堵塞研究进展及案例分析

李志建; 魏丽; 倪恒

doi:10.13205/j.hjgc.202202031

零价铁可渗透反应屏障钝化和堵塞研究进展及案例分析

doi: 10.13205/j.hjgc.202202031

李志建^1,2, ,,
魏丽^1,2,
倪恒³

1. 北京高能时代环境技术股份有限公司, 北京 100095;
2. 北京高能时代环境修复有限公司, 北京 100095;
3. 国核电力规划设计研究院有限公司, 北京 100095

基金项目:

国家重点研发计划子课题“原位再生氧化耦合型垂直可渗透反应屏障技术研究”(2019YFC1806202-01)

详细信息

通讯作者:
李志建(1977-),女,博士,高级工程师,主要从事污染场地调查修复、固体废物处理与资源化研究。lzj6543@163.com

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出版历程
- 收稿日期: 2021-01-22
- 网络出版日期: 2022-04-02
- 刊出日期: 2022-04-02

RESEARCH ADVANCES AND CASE STUDY ON PASSIVATION AND CLOGGING IN PERMEABLE REACTIVE BARRIER（PRB）

LI Zhijian^{1,2
, ,},
WEI Li^1,2,
NI Heng³

1. Beijing GeoEnviron Engineering & Technology,Inc., Beijing 100095, China;
2. Beijing GeoEnviron Remediation Co., Ltd., Beijing 100095, China;
3. State Nuclear Electric Power Planning Design & Research Institute Co.,Ltd., Beijing 100095, China

摘要

摘要: 可渗透反应墙(PRB)技术是最具经济效益的原位地下水处理技术之一,但在运行过程中,矿物沉淀钝化和堵塞介质孔隙、气体产生及生物活动堵塞可能引起屏障材料性能的恶化,进而影响PRB运行寿命和效率。为了减轻或解决钝化和堵塞对PRB技术应用的限制,对可渗透反应屏障钝化和堵塞的研究进展及典型案例进行了归纳和研究,详细阐述了引起PRB介质钝化和堵塞的原因和机理,包括矿物沉淀、气体产生、pH的影响和生物膜作用等原因导致的PRB钝化和堵塞,其中矿物沉淀引起的堵塞类型分为钙基矿物沉淀、铁铝矿物沉淀、磷酸盐和硅酸盐类矿物沉淀堵塞。针对不同的钝化和堵塞,分析其影响因素和运行条件,为PRB结构改进设计、提高PRB运行效率和寿命,发展PRB成为长期有效的修复技术提供技术支撑。
- 可渗透反应屏障(PRB) /
- 钝化 /
- 堵塞 /
- 机理 /
- 措施
Abstract: Permeable reactive barrier(PRB) is currently one of the most economical and effective in-situ groundwater treatment technologies, however, the passivation and clogging of pore space due to mineral precipitation, gas generation and biological activity results into performance failure of barrier materials, which affects the lifetime and efficiency of PRB. In order to alleviate or resolve the limitation of passivation and clogging on application of PRB, the progresses and some cases on passivation and clogging of permeable reactive barrier(PRB) were researched and reviewed, and the various types, causes and mechanisms of PRB passivation and clogging were analyzed, including the passivation and clogging types resulted from mineral precipitation, gas generation, influence of pH and biological activities, etc. Especially, primary mineral precipitation types including, calcium-based mineral precipitation, Fe and Al mineral precipitation, and precipitation due to phosphate, silicate and silicon oxide were discussed. In order to improve operation efficiency and lifetime of PRB, the different types, influences factors and running conditions of passivation and clogging were analyzed, which could provide technical support to design PRB structure successfully, improve operation efficiency and service life of PRB, and develop PRB to be a long-term effective remediation technology.
- permeable reactive barrier(PRB) /
- passivation /
- clogging /
- mechanism /
- countermeasures

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