中试紫外高级氧化耦合生物活性炭工艺去除典型嗅味物质  

Pilot test of removing typical odors by the coupled UV advanced oxidation and biological activated carbon processes

作　　者：陈钰杭 李鑫玮 甘振东 韩京龙 关银燕 梁吉艳[1] 郑群 郝智能 王爱杰 CHEN Yuhang;LI Xinwei;GAN Zhendong;HAN Jinglong;GUAN Yinyan;LIANG Jiyan;ZHENG Qun;HAO Zhineng;WANG Aijie(School of Environmental and Chemical Engineering,Shenyang University of Technology,Shenyang,110870,China;State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco Environmental Sciences,Beijing,100085,China;Beijing Enterprises Water Group(China)Investment Co.,Ltd.,Beijing,100102,China;School of Civil and Environmental Engineering,Harbin Institute of technology(Shenzhen),Shenzhen,518055,China;Beijing JENSEND Environmental Technology Co.,Ltd.,Beijing,101199,China)

机构地区：[1]沈阳工业大学环境与化学工程学院,沈阳110870 [2]中国科学院生态环境研究中心,环境化学与生态毒理学国家重点实验室,北京100085 [3]北控水务(中国)投资有限公司,北京100102 [4]哈尔滨工业大学(深圳)土木与环境工程学院,深圳518055 [5]北京景盛达环保科技有限公司,北京101199

出　　处：《环境化学》2023年第12期4366-4374,共9页Environmental Chemistry

基　　金：国家自然科学基金(22176199);山东省重点研发计划(2020CXGC011202)资助.

摘　　要：利用增设的紫外高级氧化中试装置,研究了紫外/过氧化氢(UV/H_(2)O_(2))和紫外/过氧化氢/臭氧(UV/H_(2)O_(2)/O_(3))与生物活性炭(BAC)耦合工艺对低温下大流量饮用水中较高含量土臭素(GSM)和2-甲基异莰醇(2-MIB)的去除效果.重点考察了H2O2投加量、O3投加量、紫外线剂量及BAC对嗅味物质去除的影响,并分析了UV/H2O2过程中GSM和2-MIB的降解产物情况.结果显示,相比UV/H_(2)O_(2)-BAC耦合工艺,UV/H_(2)O_(2)/O_(3)-BAC耦合工艺对GSM(28.5—34.1 ng·L^(−1))和2-MIB(83.2—94.1 ng·L^(−1))具有更显著的去除效果,去除率分别可达90.1%和86.0%.提高H_(2)O_(2)投加量、O_(3)投加量和紫外线剂量促进了紫外高级氧化工艺段对GSM和2-MIB的去除,但H2O2投加量不可过高.通过对降解产物进行分析,提出了UV/H2O2降解GSM和2-MIB的过程,其降解主要由羟基自由基引起,主要反应包括脱甲基、脱水、加成、环开裂等方式.本研究可为发展绿色高效的嗅味物质去除技术提供技术指导和支撑.Using a pilot-scale UV advanced oxidation plant,this study aimed to investigate the efficacy of UV/H_(2)O_(2)and UV/H_(2)O_(2)/O_(3)coupled with biological activated carbon(BAC)processes in removing high levels of geosmin(GSM)and 2-methylisoborneol(2-MIB)from drinking water.The effects of H_(2)O_(2)dosage,O3 dosage,UV dose,and BAC on odour removal were investigated in detail,along with the degradation products of GSM and 2-MIB during the UV/H_(2)O_(2)process.Results showed that the UV/H_(2)O_(2)/O_(3)-BAC coupling process exhibited higher removal rates on GSM(28.5—34.1 ng·L^(−1))and 2-MIB(83.2—94.1 ng·L^(−1)),with removal rates up to 90.1%and 86.0%,respectively,compared to the UV/H_(2)O_(2)-BAC coupling process.Increasing the H_(2)O_(2),O3,and UV doses promoted the removal of GSM and 2-MIB in the UV advanced oxidation process unit;however,the H_(2)O_(2)dosage should not be excessively high.Based on the degradation products,a proposed degradation process and mechanism of GSM and 2-MIB by UV/H_(2)O_(2)suggested that hydroxyl radicals,including demethylation,dehydration,addition,and ring-opening,caused immediate reactions.This study provides fundamental data and technical support for developing green and efficient odour removal technologies.

关 键 词：土臭素 2-甲基异莰醇 紫外/过氧化氢 紫外/过氧化氢/臭氧 生物活性炭 

分 类 号：TQ424.1[化学工程] TU991.2[建筑科学—市政工程]