地球与行星物理论评（中英文）2026，Vol.57Issue(2)：164-176,13.DOI:10.19975/j.dqyxx.2025-011
ZVI-AC复合材料对硝酸盐污染修复效果的激发极化法监测实验
The monitoring experiment of ZVI-AC material on nitrate pollution remediation effect by induced polarization method
摘要
Abstract
Nitrate pollution has received high attention due to its characteristics such as universality and the high carcinogenicity rate of its reduction products.The permeable reactive barrier(PRB),as an efficient and low-energy-consuming remediation technology,has great application prospects in the remediation of nitrate pollution.Among the commonly used wall remediation materials,zero-valent iron(ZVI)and activated carbon(AC)materials have great potential for the remediation of nitrate.However,currently,there is a lack of research on the long-term operational stability of the PRB technology,and the monitoring methods are limited.The induced polarization method,due to its greater sensitivity to the changes in the microscopic scale properties of porous media,is more helpful in characterizing the characteristics of the PRB filling medium.Therefore,it is urgent to explore the PRB operation performance monitoring technology based on the induced polarization method.This study focuses on the reaction mechanism of ZVI-AC for remediating nitrate pollution,as well as the feasibility of using the SIP techno-logy to monitor the remediation process of nitrate pollutants by ZVI-AC materials.The spectral induced polariza-tion method(SIP)in the frequency domain is used to monitor the process of remediating nitrate pollution by the composite material of zero-valent iron and activated carbon,and the remediation effect is comprehensively ana-lyzed in combination with means such as hydrochemistry,scanning electron microscopy(SEM),and X-ray photo-electron spectroscopy(XPS).The results show that:(1)ZVI-AC can give full play to the synergistic effect of the composite material.By adsorbing the oxidation products of ZVI with AC,the adhesion of these products on the sur-face of iron particles is reduced,thereby extending the service life of ZVI.(2)The polarizability can continuously decrease within the range of 0.6 to 0.7 along with the decrease in the nitrate removal rate,while the normalized re-laxation time is positively correlated with the remaining nitrate removal rate and the volume of iron particles,show-ing a strong indicative effect.The experimental results provide an important theoretical basis for the induced pola-rization method to serve as a technical means for providing low-impact and long-term monitoring for PRB in engi-neering practice.关键词
硝酸盐污染/渗透式反应墙/零价铁/活性炭/激发极化Key words
nitrate pollution/PRB/zero-valent iron/activated carbon/induced polarization分类
天文与地球科学引用本文复制引用
晁琛,张家铭,马新民,郭丽莉,刘士亮,李书鹏,毛德强..ZVI-AC复合材料对硝酸盐污染修复效果的激发极化法监测实验[J].地球与行星物理论评（中英文）,2026,57(2):164-176,13.基金项目
国家重点研发计划(2023YFE0113900)Supported by the National Key Research and Development Program of China(Grant No.2023YFE0113900) （2023YFE0113900）
