炭铁可渗透反应墙修复氯代烃及淤堵性能研究

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Abstract Column tests were used to study the permeability, clogging and remediation performance of PRB in treating chlorinated hydrocarbon-contaminated groundwater (at different time points within 24hours). The results show that the permeability of carbon iron composite increased with time in 24hours. The removal rate of these PRB columns was the highest at 74.23% after 4hs of operation. The removal rate of which decreases to 64.59% after 8hs’ operation. The removal rate of PRB reactive materials in remediating trichloro ethylene was affected by multiple factors. When the permeability of PRB is low, the water flow rate through which is low as well. Under this condition, hydroxide ions are formed in these PRB system. Hence, ions in the groundwater are precipitated stably and completely, which leads to the clogging of the PRB system. When the water flow is fast, although there are hydroxide ions generated all the time, flushing leads to a higher permeability of the PRB system.

Key words： permeable reactive barrier chlorinated hydrocarbon clogging permeability flushing

Received: 29 January 2023

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X523

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	CHEN Rui-xin
	JIANG Mei-yang
	WANG Fei

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CHEN Rui-xin,JIANG Mei-yang,WANG Fei. The remediation and clogging performance of chlorinated hydrocarbons treated by biochar-iron permeable reactive barrier[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(9): 4578-4584.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I9/4578

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