双向脉冲电场强化柠檬酸淋洗修复Pb污染土壤的研究

李桥; 金吉媛; 郎建; 杨乃瑞; 丁思铖; TICHAPONDWA Shepherd; 丁文川

doi:10.1051/wujns/2026315500

您当前的位置：

首页 >

文章列表页 >

双向脉冲电场强化柠檬酸淋洗修复Pb污染土壤的研究

Environmental Science | 更新时间：2026-10-29

- 双向脉冲电场强化柠檬酸淋洗修复Pb污染土壤的研究
- Bidirectional Pulsed Electric Field Enhancing Citric Acid Washing for Pb-Contaminated Soil Remediation
- 武汉大学学报自然科学英文版 2026年31卷第5期页码：500-506
- 作者机构：
  
  1.中国电建集团成都勘测设计研究院有限公司，四川成都 610072
  2.美国杜克大学化学系，北卡罗来纳达勒姆 27708
  3.南非比勒陀利亚大学化学工程系，豪登比勒陀利亚 0002
  4.重庆大学三峡库区生态环境教育部重点实验室，重庆 400045
- 作者简介：
  
  LI Qiao, male, Senior engineer, research direction: environmental pollution control engineering. E-mail: 418178795@qq.com
  E-mail: dingwenchuan@cqu.edu.cn
- 基金信息：
  
  the Grant from the Science and Technique Key Programs of Power China Ltd(P45220);the Fundamental Research Funds for the Central Universities(2024CDJYDYL014)
- DOI：10.1051/wujns/2026315500
  中图分类号： X52
- 收稿：2025-10-14，
  
  纸质出版：2026-10-24
- 稿件说明：
移动端阅览
李桥,金吉媛,郎建等.双向脉冲电场强化柠檬酸淋洗修复Pb污染土壤的研究[J].武汉大学学报自然科学英文版,2026,31(05):500-506.

LI Qiao, JIN Jiyuan, LANG Jian, et al. Bidirectional Pulsed Electric Field Enhancing Citric Acid Washing for Pb-Contaminated Soil Remediation[J]. Wuhan Univ J of Nat Sci, 2026, 31(5): 500-506.
李桥,金吉媛,郎建等.双向脉冲电场强化柠檬酸淋洗修复Pb污染土壤的研究[J].武汉大学学报自然科学英文版,2026,31(05):500-506. DOI： 10.1051/wujns/2026315500.

LI Qiao, JIN Jiyuan, LANG Jian, et al. Bidirectional Pulsed Electric Field Enhancing Citric Acid Washing for Pb-Contaminated Soil Remediation[J]. Wuhan Univ J of Nat Sci, 2026, 31(5): 500-506. DOI： 10.1051/wujns/2026315500.

摘要

降低淋洗剂消耗的同时显著提升重金属去除效率一直是重金属淋洗技术面临的关键挑战。为此，本研究采用双向脉冲电场辅助柠檬酸淋洗，对某废弃铅冶炼厂的铅污染土壤开展实验室规模的修复实验，评估了不同电场参数下Pb的淋洗效果并探讨其强化机理。结果表明，相较于单一柠檬酸淋洗，双向脉冲电场不同程度地提高了柠檬酸对Pb的去除效果。在脉冲频率0.08 Hz、电压24 V、占空比75%的条件下，通电处理6 h后Pb的去除率可提升至72.7%，较单一柠檬酸淋洗去除率提高22.4%，且柠檬酸消耗量减少50%。机制分析表明，双向脉冲电场通过影响土壤pH、提高土壤温度和增强离子电迁移，产生电渗和电冲击效应，促使Pb向酸可提取态转化，提高Pb的活性和与柠檬酸活性基团的反应几率，从而显著强化淋洗过程。研究结果表明，该技术能有效克服传统直流电场中电极极化与聚焦效应等问题，为发展快速、高效且更具工程可行性的土壤重金属修复方法提供技术支撑。

Abstract

Reducing leaching-agent consumption while simultaneously enhancing heavy-metal removal efficiency remains a major challenge for soil-washing technologies. In this study

a treatment assisted by a bidirectional pulsed electric field (BPEF) was integrated with citric acid washing to efficiently remediate Pb-contaminated soil from an abandoned lead smelter site. The washing performance under different electrical parameters was systematically evaluated

and the mechanism underlying electro-enhanced removal was preliminarily investigated. The results demonstrated that the BPEF significantly improved Pb removal compared with citric acid washing alone. The Pb removal rate reached 72.7% after 6 h of treatment under the conditions of a pulse frequency of 0.08 Hz

a voltage of 24 V

and a duty cycle of 75%

representing a 22.4% increase over citric acid treatment alone

while reducing citric acid consumption by 50%. Mechanistic analyses indicated that BPEF altered soil pH

increased soil temperature

and enhanced ion electromigration

thereby inducing electro-osmotic and electroshock effects. These coupled processes facilitate the transformation of Pb into a more acid-extractable fraction

increase its activity

and strengthen its interaction with the functional groups of citric acid

ultimately promoting the washing efficiency. Overall

this technique effectively overcomes the limitations associated with conventional direct-current electro-assisted washing

such as electrode polarization and focusing effects

thus providing a promising approach for developing rapid

efficient

and more engineering-feasible technologies for heavy-metal-contaminated soil remediation.

关键词

Keywords

references

Hou D Y , Jia X Y , Wang L W , et al . Global soil pollution by toxic metals threatens agriculture and human health [J ] . Science , 2025 , 388 ( 6744 ): 316 - 321 .

Liu T T , Wang Z . Contamination and health risk assessment of heavy metals in soil surrounding an electroplating factory in Jiaxing, China [J ] . Scientific Reports , 2024 , 14 : 4097 .

Dong Q Y , Wen H T , Wang P , et al . Health risk assessment of heavy metals in soils and crops in a mining area (Au-Ag-Cu-trona-oil et al.) of the Nanyang Basin, Henan Province, China[J ] . China Geology , 2023 , 6 ( 4 ): 567 - 579 .

Luo W M , Mu G T , Wu X L , et al . The hotspots and trends of patented technologies for heavy metal-contaminated soil remediation: A systematic review [J ] . Agriculture , 2024 , 14 ( 5 ): 715 .

Tan X J , Xiang J J , Yin Y , et al . Research progress of combined strengthening leaching remediation technology for heavy metal contaminated soil [J ] . Environmental Sanitation Engineering , 2022 , 30 ( 4 ): 74 - 82 (Ch) .

Zhang H , Xu Y X , Kanyerere T , et al . Washing reagents for remediating heavy-metal-contaminated soil: A review [J ] . Frontiers in Earth Science , 2022 , 10 : 901570 .

Zheng X J , Li Q , Wang Z L , et al . Remediation of heavy metals contaminated soil by enhanced electrokinetic technology: A review [J ] . Arabian Journal of Chemistry , 2024 , 17 ( 6 ): 105773 .

Zhang X J , Zong Q , Ye J H , et al . Research progress on enhanced electrokinetic remediation of heavy metal contaminated soil [J ] . Journal of Donghua University (Natural Science Edition) , 2021 , 47 ( 6 ): 91 - 99 (Ch) .

Hussain A A , Moeez M , Akram A , et al . Restoration of alkaline soils contaminated by inorganic elements under pulsed electrokinetics [J ] . Environmental Research , 2025 , 282 : 121969 .

Abou-Shady A , El-Araby H . A comprehensive analysis of the advantages and disadvantages of pulsed electric fields during soil electrokinetic remediation [J ] . International Journal of Environmental Science and Technology , 2025 , 22 ( 5 ): 3895 - 3925 .

Mao X Y , Han F X , Shao X H , et al . Remediation of lead-, arsenic-, and cesium-contaminated soil using consecutive washing enhanced with electro-kinetic field [J ] . Journal of Soils and Sediments , 2016 , 16 ( 10 ): 2344 - 2353 .

Yang X , Mao X Y , Shao X H , et al . Enhanced techniques of soil washing for the remediation of heavy metal-contaminated soils [J ] . Agricultural Research , 2018 , 7 ( 2 ): 99 - 104 .

Xu D P , Li X B , Sun L . Washing kinetics and mechanism of removing Pb and Cd from the contaminated soil with the organic acids [J ] . Journal of Safety and Environment , 2015 , 15 ( 3 ): 261 - 266 (Ch) .

Li T T , Guo S H , Wang J N , et al . Effect of periodic switching electrode polarity on electro-bioremediation of oil contaminated soil [J ] . Environmental Engineering , 2016 , 34 ( 1 ): 159 - 163 , 154(Ch).

Ministry of Ecology and Environment of the People’s Republic of China . Soil Environmental Quality Risk Control Standard for Soil Contamination of Development Land (Trial)( GB 36600–2018 ) [S ] . Beijing : China Environmental Science Press , 2018 (Ch).

Ng Y S , Sen Gupta B , Hashim M A . Effects of operating parameters on the performance of washing-electrokinetic two stage process as soil remediation method for lead removal [J ] . Separation and Purification Technology , 2015 , 156 : 403 - 413 .

Cameselle C , Gouveia S , Cabo A . Enhanced electrokinetic remediation for the removal of heavy metals from contaminated soils [J ] . Applied Sciences , 2021 , 11 ( 4 ): 1799 .

Zhang Y J , Chu G H , Dong P , et al . Enhanced electrokinetic remediation of lead- and cadmium-contaminated paddy soil by composite electrolyte of sodium chloride and citric acid [J ] . Journal of Soils and Sediments , 2018 , 18 ( 5 ): 1915 - 1924 .

Liu Z T . Electrokinetic Remediation of Lead Contaminated Kaolin and Study on Mechanism of Reversed Direction of Electroosmotic Flow [D ] . Wuhan : Wuhan University , 2019 : 25(Ch).

Wang Y D . Study on the Remediation from Copper and Lead Polluted Soil by Electrokinetic Combining with Washing [D ] . Beijing : China University of Geosciences , 2016 : 52(Ch).

Li S C , Pan W B , Tong L Z , et al . Remediation of Sb-contaminated soil by low molecular weight organic acids washing: Efficiencies and mechanisms [J ] . Sustainability , 2023 , 15 ( 5 ): 4147 .

Abou-Shady A , El-Araby H . Reverse polarity-based soil electrokinetic remediation: A comprehensive review of the published data during the past 31 years (1993-2023) [J ] . ChemEngineering , 2024 , 8 ( 4 ): 82 .

Zhao X L , Feng S H , Bharti B , et al . Enhanced remediation of Pb(II)-contaminated fine-grained soil using citric acid ex situ leaching coupled with electrochemical treatment [J ] . Scientific Reports , 2025 , 15 : 26436 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

交叉扩散驱动的具有避难所和Crowley-Martin功能反应的捕食-食饵模型的正解

C2上偏微分-差分方程整函数解的研究

具有较大边数的图集的彩虹k-因子

外三角长度范畴中Gorenstein子范畴的稳定性

具非线性梯度源和奇异势的快扩散方程解的熄灭