给水管网颗粒物对消毒副产物的芬顿催化去除机制  

Removal of DBPs by particles from drinking water distribution system through in-situ Fenton reaction

作　　者：李鹏鲁 庄媛 张克峰[3] 石宝友[1,2] LI Penglu;ZHUANG Yuan;ZHANG Kefeng;SHI Baoyou(Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Municipal and Environmental Engineering,Shandong Jianzhu University,Ji’nan 250101,China)

机构地区：[1]中国科学院生态环境研究中心,中国科学院饮用水科学与技术重点实验室,北京100085 [2]中国科学院大学,北京100049 [3]山东建筑大学市政与环境工程学院,山东济南250101

出　　处：《环境工程学报》2024年第12期3467-3474,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51678558)。

摘　　要：给水管网中以铁颗粒物为代表的颗粒物通常被视为致浊致色的污染物,本研究以铁颗粒物作为催化剂“以废治废”进行“黄水”处理净化,探究其对水中消毒副产物的降解净化效能。结果表明,管网颗粒物非均相催化对三卤甲烷和卤乙腈去除率分别为51.8%和47.6%,对卤乙酸去除效果不明显。基于上述三种消毒副产物的细胞毒性降低了81.07%、遗传毒性降低了30.46%。管垢占比最多的两种晶体分别是磁赤铁矿和针铁矿,分别为25%和23%,是发挥催化作用的关键组分。管垢颗粒物的破碎会向水中释放腐殖酸有机物,阻碍颗粒物团聚,有助于提升催化活性位点。由此可见,管网颗粒物芬顿能够有效降解DBPs、降低毒性风险,为给水管网“黄水”颗粒物芬顿反应削弱水质毒性风险提供了新思路。Iron particles in drinking water distribution systems are usually regarded as pollutants that causes turbidity and color problem.This study used iron particles as a catalyst to"treat waste with waste"for in-situ removal of disinfection by-products(DBPs)in"yellow water".The results showed that the removal rates of trihalomethane and haloacetonitrile by in situ catalysis of iron particles were 51.8%and 47.6%,respectively,while the removal effect of haloacetic acid was not significant.Based on the three DBPs mentioned above,the cytotoxicity was reduced by 81.07%and the genetic toxicity was reduced by 30.46%.The two main types of crystals in the iron particles were magnetite and goethite,which are 25%and 23%,respectively,and they were key catalytic sites.The iron particles would release humic acid organic compounds into the water,hindering particle aggregation and helping to enhance catalytic activity sites.Hence,the results revealed that in-situ Fenton reaction of iron particles in the drinking water distribution systems can effectively degrade DBPs and reduce toxicity risks,providing a new approach for the in-situ Fenton reaction to weaken the toxicity risk of"yellow water".

关 键 词：给水管网 管垢 黄水 消毒副产物 

分 类 号：X506[环境科学与工程—环境工程]