腐植酸包覆纳米零价铁去除水中环丙沙星性能及影响因素  

Removal performance of Ciprofloxacin using Humic Acid Coated Nano Zero-Valent Iron in aquatic Environment and its Influencing Factors

作　　者：井江心 刘洋之 黄鹏 马军伟[2] JING Jiangxin;LIU Yangzhi;HUANG Peng;MA Junwei(School of Environmental and Resource Sciences,Zhejiang A&F University,Hangzhou 31130,China;State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Institute of Environment,Resource,Soil and Fertilizers,Zhejiang Academy of Agricultural Sciences,Hangzhou 31002,China;School of Public Health&Management,Wenzhou Medical University,Wenzhou 325035,China)

机构地区：[1]浙江农林大学环境与资源学院,浙江杭州311300 [2]浙江省农业科学院,环境资源与土壤肥料研究所,农产品质量安全危害因子与风险防控国家重点实验室,浙江杭州310021 [3]温州医科大学公共卫生与管理学院,浙江温州325035

出　　处：《水处理技术》2025年第2期44-49,54,共7页Technology of Water Treatment

基　　金：国家自然科学基金项目(42307024);浙江省自然科学基金(LQ23D030004);浙江省科技创新领军人才项目(2021R52045)。

摘　　要：通过液相还原法制备了腐植酸包覆纳米零价铁(nZVI-HA)材料,并以典型抗生素-环丙沙星(CIP)为目标污染物,探究了nZVI-HA对水中CIP的去除性能及影响因素(pH、初始浓度和Cu^(2+))。结果表明,nZVI-HA(粒径为78.4±28.2 nm)表面粗糙并附着有细小颗粒,其中铁主要以Fe^(0)的形态存在。nZVI-HA可有效去除水中CIP,并实现CIP的还原脱氟。动力学过程显示nZVI-HA对CIP的去除存在快速和慢速两个阶段。在pH=5.0时nZVI-HA对CIP的去除性能和脱氟效率优于pH=7.0和pH=9.0的条件。同时,增加反应初始CIP浓度,有利于提高nZVI-HA对CIP的单位去除量。结合氟离子生产率和总有机碳去除率,推测nZVI-HA对水中CIP的去除包括降解和吸附过程。最后,水中Cu^(2+)可在nZVI-HA表面吸附-还原为Cu^(0),组成Cu-Fe双金属原电池,加速CIP的去除与脱氟。A humic acid-modified nZVI(nZVI-HA)material was prepared by liquid-phase reduction method.Ciprofloxacin(CIP),as a typic antibiotic in water,was investigated as a target pollutant.The effects of different pH,initial CIP concentration and Cu^(2+)on the removal of CIP by nZVI-HA were studied.The results showed that nZVI-HA(particle size 78.4±28.2 nm)has a rough surface with fine particles attached,in which iron is mainly present in the form of Fe^(0).nZVI-HA could effectively remove CIP from water and achieve reductive defluorination of CIP.Kinetic process indicated that the removal of CIP using nZVI-HA could be divided a fast and a slow section.The CIP removal performance and defluorination efficiency by nZVI-HA at pH=5.0 were better than the conditions of pH=7.0 and pH=9.0.Meanwhile,increasing the initial CIP concentration of the reaction was beneficial to increase the unit removal of CIP by nZVI-HA.Combined with the fluoride ion production rate and total organic carbon(TOC)removal rate,we hypothesised that the removal of CIP from water by nZVI-HA included both degradation and adsorption processes.Finally,we found that Cu^(2+)in aqueous solution could be adsorbed and reduced to Cu^(0) on the surface of nZVI-HA forming Cu-Fe bimetallic battery,which consequently accelerated the degradation.

关 键 词：纳米零价铁 腐植酸 改性 环丙沙星 去除 

分 类 号：TQ424[化学工程]