乳化纳米铁修复硝基苯污染含水层研究

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Abstract Simulated experiment was conducted to evaluate the availability of remediation of NB-contaminated aquifer with the emulsified nanoscale zero-valent iron (EZVI) and characteristics of geochemical indicators variations. The results showed that none NB was detected and high concentration of aniline (AN) produced in the downgradient zone of EZVI injected well after 40days. These suggested EZVI reaction zone could be formed and remove NB efficiently, and NB-contaminant plume was controlled effectively. EZVI injection could result in increase of pH, however, neutralization reaction of hydroxide ion and organic acid generated by emulsified oil hydrolyzing avoid drastic pH change. Strong reducing environment was form indicated by Eh declination, which was favorable for the degradation of NB. Increase of pH and decrease of Eh implied that EZVI could enhance NB-polluted aquifer remediation by a synergistic effect of iron reduction coupled with biotic processes. Generations of nitrite and sulfide indicated that nitrate reduction and sulfate reduction occurred in the reaction zone.

Key words： nitrobenzene (NB) emulsified nanoscale zero-valent iron (EZVI) aquifer geochemical indicators

Received: 15 May 2017

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	Articles by authors
	DONG Yang
	WEN Chun-yu
	YU Jin-qiu
	ZHANG Xia-long
	REN Li-ming
	DONG Jun

Cite this article:

DONG Yang,WEN Chun-yu,YU Jin-qiu等. Laboratory evaluation of degradation of nitrobenzene in aquifer using emulsified nanoscale zero-valent iron[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4541-4548.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I12/4541

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