乳化纳米铁浆液在含水层中的迁移特征研究

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Abstract The scope of this research is to investigate the transport characteristics and influencing factors of remedial agent-emulsified nanoscale-zero-valent-iron (EZVI). One-dimensional column experiments were conducted to obtain breakthrough curves and substrate distribution of EZVI, and results indicated that:the modification of NZVI by emulsified oil improved the transportability of NZVI, and the migration distance of EZVI was 2~3 times increased compared with that of NZVI. The excess of emulsified oil in EZVI suspension transported down-gradient with groundwater flow, forming two reaction zones with NZVI and emulsified oil, respectively. Larger size of the sand grain facilitated the transport of EZVI, and the migration distance in coarse sand was about 1.9 times longer than that in the fine sand. The injection velocity affected the transport by controlling single collector efficiency, and higher collection probability was achieved by higher injection velocity. The co-existing ions have little effect on the EZVI transport ability. When the injection velocity of EZVI was 3cm/min, and the slurry concentration was 2g/L, the transport showed best performance.

Key words： emulsified nanoscale-zero-valent iron transport behavior porous media in-situ remediation

Received: 13 October 2017

X703.5

Corresponding Authors: 董军,教授,dongjun@jlu.edu.cn E-mail: dongjun@jlu.edu.cn

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	DONG Jun
	LI Chang-suo
	WEN Chun-yu
	HAN Jian-jiang

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DONG Jun,LI Chang-suo,WEN Chun-yu等. Transport characteristics of emulsified nanoscale-zero-valent-iron in saturated porous media[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2175-2181.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2175

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