土壤2025，Vol.57Issue(2)：247-257,11.DOI:10.13758/j.cnki.tr.2025.02.001
腐植酸强化微生物去除土壤重金属和多环芳烃研究进展
Research Progress on Humic Acid-enhanced Microbial Remediation of Soil Contaminated with Heavy Metals and Polycyclic Aromatic Hydrocarbons
摘要
Abstract
Globally,the issue of soil contamination from heavy metals,polycyclic aromatic hydrocarbons(PAHs),and their composite contaminants is notably conspicuous.Microbial remediation technology,renowned for its low cost,environmental friendliness,and minimal secondary pollution,stands out as a promising soil remediation approach.However,its effectiveness is often hampered by factors,such as nutrient conditions and the characteristics of pollutants.Humic acid,endowed with numerous active functional groups and a distinctive chemical structure,significantly boosts the microbial reduction of heavy metals and the biodegradation of PAHs.It facilitates these processes through adsorption and chelation,effectively reinforcing microbial reduction of heavy metals and the biodegradation of PAHs and acting as a surfactant to enhance PAH solubility.Moreover,it acts as electron shuttles,facilitates microbial respiration and provides energy sources for microorganisms,thereby enhancing the bioreduction of heavy metals and the biodegradation of PAHs in soil.However,attention is needed as humic acid may also interact with pollutants to create persistent compounds,contribute to soil acidification,or diminish the rate of electron transfer,potentially obstructing microbial remediation effects.This article aims to succinctly review and analyze recent research progress in humic acid-enhanced microbial remediation of heavy metals and PAH-contaminated soils.It seeks to elucidate the mechanisms underpinning humic acid's enhancement role and to conduct a comprehensive evaluation of the merits and limitations of humic acid-enhanced microbial remediation technology.Future researches should focus on developing robust assessment systems for humic acid-enhanced microbial remediation of heavy metals and PAH-contaminated soils.The impact of humic acid on microbial metabolic expression and the production of functional proteins should also be explored using advanced techniques such as metagenomics.These comprehensive approaches will deepen our understanding of how humic acid influences microbial remediation in contaminated soils.关键词
腐植酸/重金属/多环芳烃/复合污染/土壤/微生物修复Key words
Humic acid/Heavy metals/Polycyclic aromatic hydrocarbons/Co-contaminated/Soils/Microbial remediation分类
资源环境引用本文复制引用
刘晓英,刘世宾,刘志华,黄文斌..腐植酸强化微生物去除土壤重金属和多环芳烃研究进展[J].土壤,2025,57(2):247-257,11.基金项目
国家重点研发计划项目(2020YFC1808300),地质灾害防治与地质环境保护国家重点实验室自主课题(SKLGP2021Z020)和四川省自然科学基金面上项目(2023NSFSC0135)资助. （2020YFC1808300）
