可见光-过一硫酸盐-磁性离子交换树脂协同工艺去除水中腐植酸的效能与机理  

Efficacy and Mechanism of Combined Process of Visible Light-Peroxymonsulfate-Magnetic Ion Exchange Resin for Humic Acid Removal in Water

作　　者：杨生巧 孙东晓 丁磊[2] 何海涛 叶港归 董志强 YANG Shengqiao;SUN Dongxiao;DING Lei;HE Haitao;YE Ganggui;DONG Zhiqiang(Municipal Environmental Protection Engineering Co.,Ltd.of CREC Shanghai Group,Shanghai201906,China;School of Civil Engineering and Architecture,Anhui University of Technology,Ma̓anshan243032,China;College of Environmental Science and Engineering,Tongji University,Shanghai200092,China;China Railway Engineering Group Co.,Ltd.,Beijing100039,China)

机构地区：[1]中铁上海工程局集团市政环保工程有限公司,上海201906 [2]安徽工业大学建筑工程学院,安徽马鞍山243032 [3]同济大学环境科学与工程学院,上海200092 [4]中国铁路工程集团有限公司,北京100039

出　　处：《净水技术》2023年第10期95-104,共10页Water Purification Technology

基　　金：国家自然科学基金项目(51308001);生物膜法水质净化及利用技术教育部工程研究中心开放基金资助项目(BWPU2021KF01);中国铁路工程集团有限公司重点研发(2021-重点-05)。

摘　　要：文中研究了可见光(VI)-过一硫酸盐(PMS)-磁性离子交换(MIEX)树脂体系协同处理水中腐植酸(HA)的效能、活性氧化物质(ROS)种类及活化机理、HA的去除机理以及影响HA去除的因素。结果表明,该体系对水中HA有较好的去除效果,反应90 min后,HA的去除率达到52.9%,显示了三者的协同促进作用。树脂母体中的铁氧化物协同VI,可有效活化PMS,产生硫酸根自由基和羟基自由基等活性物质。HA的去除主要是ROS氧化HA强化MIEX树脂的吸附作用,而非自由基的矿化降解。MIEX树脂投加量以及PMS浓度的增加可促进HA的去除,而温度在298 K以上时,影响不明显。该体系在有效去除水中HA的同时,可有效去除反应过程中的副产物SO_(4)^(2-),显示了良好的应用前景。The removal efficiency and mechanism of humic acid,activation mechanism of persulfate and active oxidation substances,and the factors affecting humic acid removal were investigated from water by the visible light-peroxymonsulfate-magnetic ion exchange resin system.The results showed that the system had a good removal on humic acid in water,and the removal reached 52.9%after 90 min,showed the synergistic promotion effect of the three factors.The iron oxides in the resin matrix with visible light could effectively activate persulfate to produce active substances such as sulfate radicals and hydroxyl radicals.The removal mechanism of humic acid was mainly attributed to the enhanced adsorption of magnetic ion exchange resin by the oxidation of reactive oxidation substances rather than the mineralization degradation of humic acid by radicals.Increasing the resin and peroxymonsulfate concentration promoted the removal of humic acid,while the effect of temperature was not obvious at above 298 K.The sulfate,a by-product of the reaction process,could be well removed as well as humic acid in the process of visible light-persulfate-magnetic ion exchange resin.Therefore,the system showed a potential application for drinking water treatment.

关 键 词：可见光(VI) 过一硫酸盐(PMS) 磁性离子交换(MIEX)树脂 腐植酸(HA) 高级氧化工艺 

分 类 号：X703[环境科学与工程—环境工程]