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Article

Laws and Mechanism of the Fe (III) Clogging of Porous Media in Managed Aquifer Recharge

by 1,2,3, 1,2,3,* and 1,2,3
1
Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Changchun 130021, China
2
Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China
3
College of New Energy and Environment, Jilin University, Changchun 130021, China
*
Author to whom correspondence should be addressed.
Academic Editor: Brigitte Helmreich
Water 2021, 13(3), 284; https://doi.org/10.3390/w13030284
Received: 1 December 2020 / Revised: 19 January 2021 / Accepted: 21 January 2021 / Published: 25 January 2021
(This article belongs to the Special Issue Rainwater Management in Urban Areas)
The use of stormwater for managed aquifer recharge (MAR) has become one of the most important ways to deal with water shortages and the corresponding environmental geological problems, especially in the north of China. The Fe (III) clogging of porous media is a common and significant problem that influences the effect of the infiltration rate. This paper focuses on the migration characteristics and clogging mechanisms of iron hydroxides in sand columns. The results indicate that the permeability of porous media significantly decreased at the inlet of the fine sand column and inside the coarse sand column. We demonstrated that, when the Fe (III) concentration was higher, a smaller infiltration medium size was produced more rapidly, and there was more significant clogging. More than 80% of the injected Fe (III) remained in the sand column, and more than 50% was retained within 1 cm of the column inlet. The mass retention increased with the decrease in the size of the infiltration medium particles and with the increase in the injected Fe (III) concentration. The main material that caused Fe (III) clogging was iron hydroxide colloids, which were in the form of a granular or flocculent membrane coating the quartz sand. The mechanisms of clogging and retention were blocking filtration and deep bed filtration, adsorption, and deposition, which were strongly affected by the coagulation of Fe (III) colloidal particles. View Full-Text
Keywords: managed aquifer recharge; urban stormwater; clogging managed aquifer recharge; urban stormwater; clogging
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MDPI and ACS Style

Zhang, H.; Ye, X.; Du, X. Laws and Mechanism of the Fe (III) Clogging of Porous Media in Managed Aquifer Recharge. Water 2021, 13, 284. https://doi.org/10.3390/w13030284

AMA Style

Zhang H, Ye X, Du X. Laws and Mechanism of the Fe (III) Clogging of Porous Media in Managed Aquifer Recharge. Water. 2021; 13(3):284. https://doi.org/10.3390/w13030284

Chicago/Turabian Style

Zhang, Hexuan, Xueyan Ye, and Xinqiang Du. 2021. "Laws and Mechanism of the Fe (III) Clogging of Porous Media in Managed Aquifer Recharge" Water 13, no. 3: 284. https://doi.org/10.3390/w13030284

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