电化学-水动力循环耦合井内生物反应器去除地下水中苯胺

李爽; 文章; 朱棋; 刘慧; 杨舒婷

doi:10.3799/dqkx.2022.375

Volume 47 Issue 11

Nov. 2022

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Li Shuang, Wen Zhang, Zhu Qi, Liu Hui, Yang Shuting, 2022. Removal of Aniline from Groundwater by an Electrochemical-Hydrodynamic Cyclic Coupling In-Well Bioreactor. Earth Science, 47(11): 4176-4183. doi: 10.3799/dqkx.2022.375

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Li Shuang, Wen Zhang, Zhu Qi, Liu Hui, Yang Shuting, 2022. Removal of Aniline from Groundwater by an Electrochemical-Hydrodynamic Cyclic Coupling In-Well Bioreactor. Earth Science, 47(11): 4176-4183. doi: 10.3799/dqkx.2022.375

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Removal of Aniline from Groundwater by an Electrochemical-Hydrodynamic Cyclic Coupling In-Well Bioreactor

doi: 10.3799/dqkx.2022.375

School of Environmental Studies, China University of Geosciences, Wuhan 430078, China

Received Date: 2022-07-14
Available Online: 2022-12-07
Publish Date: 2022-11-25

Abstract

Abstract

To ensure the efficient and safe in-situ remediation process of aniline contamination in aquifer without secondary pollution, a method for the remediation of aniline in groundwater by an in-well bioreactor under electrochemical and hydrodynamic cycle is proposed. Driven by the hydrodynamic circulation system, the volatilization of aniline in the hydrodynamic circulation system was evaluated and oxygen was provided by electrochemical means. The bioreactor in the well provided the repair carrier. The remediation experiment of aniline degradation by the bioreactor in the well was carried out in the aquifer system simulated by the sand tank. The growth curve and aniline restoration in aquifer were simulated. After 289 hours of repair, the average concentration of aniline in the system was reduced from 298 mg/L to 132 mg/L, and the removal rate was 56.5%. During operation, the removal rate of aniline was 1.10 mg/(L·h) in 48 h, 0.85 mg/(L·h) in 48-72 h, and 0.65 mg/(L·h) in 72 h to 289 h. Oxidative degradation was gradually weakened. The process conforms to the Michaelis-Menten equation, and the reaction rate is -6.71×10^-7/(15+t)². This system is based on the improvement of groundwater dynamic circulation technology, and is expected to be applied to organic groundwater remediation.
- aniline contamination,
- electrochemical-hydrodynamic cycle circulation,
- in-well bioreactor,
- dynamical model,
- hydrogeology

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References(31)

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Removal of Aniline from Groundwater by an Electrochemical-Hydrodynamic Cyclic Coupling In-Well Bioreactor

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