<italic style="font-style: italic">In Situ</italic> Remediation of Nitrobenzene-Contaminated Groundwater Using Emulsified Zero-Valent Iron Reduction Coupled with Microbial Oxidation

XU Baiqing; ZHAO Yue; CHEN Mingxiang; SHAN Guangbo; LI Aimin; ZHANG Lei

doi:10.7652/xjtuxb202512006

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In Situ Remediation of Nitrobenzene-Contaminated Groundwater Using Emulsified Zero-Valent Iron Reduction Coupled with Microbial Oxidation

Special Topic Pollution Control and Resource Utilization in the“Dual Carbon”Context | 更新时间：2025-12-08

- In Situ Remediation of Nitrobenzene-Contaminated Groundwater Using Emulsified Zero-Valent Iron Reduction Coupled with Microbial Oxidation
- Journal of Xi'an Jiaotong University Vol. 59, Issue 12, Pages: 69-79(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202512006
  CLC： X523
- Received：29 April 2025，
  
  Published：10 December 2025
- 稿件说明：
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XU Baiqing, ZHAO Yue, CHEN Mingxiang, et al. In Situ Remediation of Nitrobenzene-Contaminated Groundwater Using Emulsified Zero-Valent Iron Reduction Coupled with Microbial Oxidation[J]. Journal of Xi'an Jiaotong University, 2025, 59(12): 69-79. DOI: 10.7652/xjtuxb202512006.
DOI：

XU Baiqing, ZHAO Yue, CHEN Mingxiang, et al. In Situ Remediation of Nitrobenzene-Contaminated Groundwater Using Emulsified Zero-Valent Iron Reduction Coupled with Microbial Oxidation[J]. Journal of Xi'an Jiaotong University, 2025, 59(12): 69-79. DOI: 10.7652/xjtuxb202512006. DOI：

摘要

为破解在产企业场地污染“边生产、边修复”难题，针对乳化零价铁还原耦合微生物氧化技术在硝基苯污染地下水中的应用开展了实验研究。构建了室内砂箱反应系统，系统考察了乳化零价铁还原硝基苯效率的影响因素，评价了苯胺的生物降解规律及关键功能菌群；在污染场地开展了化学还原-生物氧化反应带中试，考察了水质参数动态变化及污染去除效果。砂箱实验表明：酸性条件（pH=4）显著提升还原效率，5 h硝基苯去除率达99.82%；小粒径乳化零价铁更具活性，经济最优铁与硝基苯质量比为1.2～1.6；苯胺降解菌群呈现质量浓度依赖性，质量浓度低于200 mg/L时降解率可达95%以上，达到1200 mg/L时降解率受抑制降至52.13%～62.21%，假单胞菌门和浮霉菌门为优势功能菌。现场中试结果表明，乳化零价铁还原-微生物氧化串联修复技术可有效去除地下水中的硝基苯和苯胺，上游化学反应带30d内硝基苯去除率达95.69%，下游生物反应带对累积苯胺的降解率为89.06%。研究可为在产企业污染地下水原位绿色修复提供数据参考。

Abstract

To address the challenge of “implementing remediation while production continues”at operating industrial sites

an experiment was conducted on the application of emulsified zero-valent iron reduction coupled with microbial oxidation in treating nitrobenzene-contaminated groundwater. A laboratory-scale sandbox reaction system was first constructed to systematically investigate factors affecting the efficiency of nitrobenzene reduction by emulsified zero-valent iron and evaluate the biodegradation patterns of aniline and key functional microbial consortia.Then a pilot-scale in-situ chemical reduction-biological oxidation reaction zone was set up at a contaminated sit

e to examine dynamic variations in water quality parameters and contaminant removal efficacy.According to the sandbox experiment

the reduction efficiency was significantly enhanced in acidic conditions（pH=4）

and 99.82% nitrobenzene was removed within 5 h；smaller emulsified zero-valent iron particles exhibited higher reactivity

with an economically optimal iron/nitrobenzene mass ratio of 1.2—1.6；the aniline-degrading microbial consortium displayed mass concentration-dependent activity：The degradation rate exceeded 95% at mass concentrations below 200 mg/L but declined to 52.13%—62.21% at 1200 mg/L due to inhibition；

P seudomonadota

and

P lanctomycetota

were identified as dominant functional genera.Pilot-scale results confirmed the effectiveness of the emulsified zero-valent iron reduction-microbial oxidation sequential technology in removal of nitrobenzene and aniline

as evidenced by the 95.69% nitrobenzene removal within 30 d in the upstream chemical reduction zone and the 89.06% degradation of accumulated aniline in the downstream biological oxidation zone.This study is intended to provide critical data support for in-situ green remediation of contaminated groundwater at operating industrial facilities.

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Related Author

XU Baiqing

ZHAO Yue

CHEN Mingxiang

SHAN Guangbo

Li Aimin

ZHANG Lei

ZHAO Yawen

QI Man

Related Institution

School of Environment, Dalian University of Technology

中石化（大连）石油化工研究院有限公司

西安交通大学能源与动力工程学院，710049，西安School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

中国石油化工股份有限公司胜利油田分公司石油工程技术研究院，257000，山东东营Research Institute of Petroleum Engineering, Shengli Oilfield Branch, China Petroleum &Chemical Corporation, Dongying, Shandong 257000, China

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In Situ Remediation of Nitrobenzene-Contaminated Groundwater Using Emulsified Zero-Valent Iron Reduction Coupled with Microbial Oxidation

DOI：10.7652/xjtuxb202512006

摘要

Abstract

关键词

Keywords

references