TCE （TRICHLOROETHENE） REMEDIATION IN SATURATED POROUS MEDIA WITH MICRON ZERO-VALENT IRON

GU Linkai; WANG Mingyu; SUN Dongyue; WANG Yajing

doi:10.13205/j.hjgc.202208002

Volume 40 Issue 8

Nov. 2022

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GU Linkai, WANG Mingyu, SUN Dongyue, WANG Yajing. TCE （TRICHLOROETHENE） REMEDIATION IN SATURATED POROUS MEDIA WITH MICRON ZERO-VALENT IRON[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 14-21. doi: 10.13205/j.hjgc.202208002

Citation:

GU Linkai, WANG Mingyu, SUN Dongyue, WANG Yajing. TCE （TRICHLOROETHENE） REMEDIATION IN SATURATED POROUS MEDIA WITH MICRON ZERO-VALENT IRON[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 14-21. doi: 10.13205/j.hjgc.202208002

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TCE （TRICHLOROETHENE） REMEDIATION IN SATURATED POROUS MEDIA WITH MICRON ZERO-VALENT IRON

doi: 10.13205/j.hjgc.202208002

1. College of Mining, Liaoning Technical University, Fuxin 123000, China;
2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2021-02-03
Publish Date: 2022-11-08

Abstract

Abstract

Trichloroethene is a kind of soil and groundwater pollutant, which is difficult to remediate. Zero-valent iron (ZVI) has been paid much attention for many years, and whether micron zero-valent iron can be used as a practical and efficient soil and groundwater remediation material for site pollution remediation needs further study. A sand column contaminated by trichloroethene was constructed to investigate the effects of the number of micron zero valent iron (mZVI), the dosage of mZVI and the size of the medium on the removal efficiency of trichloroethene. The experimental results showed that the removal rate of mZVI was 99%, and the short-term removal effect of trichloroethene was significant. There was a positive correlation between the number of iron and removal efficiency, and 150 g of mZVI could be used to remove the pore water of the sand column under the initial concentration of TCE of nearly 10⁵ μg/L, at the same time, the reduction removal rate of fine sand (<0.075 cm) was higher than that of coarse sand (0.075~0.15 cm). The water environment change caused by the reduction and restoration of mZVI was mainly reflected in the average decrease of 170 mV of reduction potential from oxidation state to reduction state. The results showed that the mZVI has a broad application prospect in soil and groundwater pollution remediation, and it can be used as a reference in treatment of organic chlorinated hydrocarbon pollution such as trichloroethene in soil and groundwater.
- trichloroethylene contamination,
- groundwater,
- micron zero-valent iron,
- reductive dechlorination

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References(23)

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