MRGO-FMBO原位修复砷污染含水层

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Abstract To explore the feasibility of magnetic graphene oxide based Fe-Mn composite oxides (MRGO-FMBO) for remediation of As(III) polluted groundwater, simulation column experiments and two-dimensional sand box experiments were conducted to discuss the migration and distribution of MRGO-FMBO in aquifers. The effects of injection rate and concentration on the migration were explored and the development and evolution of reaction zone after the injection of MRGO-FMBO into the aquifer were studied. MRGO-FMBO presented good mobility in saturated porous media. Within the concentration range set in this study(1~8g/L), higher injection concentration led to better material mobility and less residue in simulated columns. A critical velocity value between 0.023~0.057cm/s existed that the change of injection velocity had a significant impact on the migration when it was under the critical value. However, the velocity was not the main factor affecting migration when the value was higher than the critical velocity. Besides, MRGO-FMBO could form a stable reaction zone after being injected into the underground aquifer with As remediation efficiency of 70.6% in 20days. During the whole development of the reaction zone, 7.79mg of As could be removed totally. Therefore, these results indicated that MRGO-FMBO had a good application prospect in in-situ remediation of arsenic-contaminated aquifers.

Key words： MRGO-FMBO As migration characteristics in-situ remediation

Received: 22 October 2020

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X523

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	LIU Wan-ting
	CHI Zi-fang
	HU Wen-hua

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LIU Wan-ting,CHI Zi-fang,HU Wen-hua. In-situ remediation of arsenic contaminated aquifer by MRGO-FMBO[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(6): 2698-2705.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I6/2698

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