摘要
考察了连续流体系中,滤后水经负载型二氧化铈(CeO2)催化臭氧氧化后的三卤甲烷生成势(THMsFP)情况.发现催化氧化后滤后水的THMsFP大幅降低,比单独臭氧氧化后的降低了57.0%.这主要和CeO2催化氧化所表现出来较高的TOC去除率及较高的卤代活性位破坏能力有关.考察了不同反应条件下(Br-质量浓度、接触氧化时间及臭氧投量),连续流催化氧化滤后水后THMsFP的变化规律.结果表明,在不同反应条件下,负载型CeO2催化氧化都能表现出明显控制THMsFP的优势.且低臭氧投量(0.7mg·L-1)下,CeO2催化氧化就能表现出明显控制THMsFP的优势,比单独臭氧氧化后的降低了64.9%.
This work investigated the trihalomathenes formation potential（THMsFP） of filtered surface water after catalytic ozonation in the presence of cerium oxide supported on alumina（CeO2/Al2O3/O3） in a continuous flow reactor.CeO2/Al2O3/O3oxidation caused a reduction of THMsFP of the filtered water by 57.0% compared with ozonation alone.It is related to the higher TOC removal and more halogen reactive sites destruction during catalytic ozonation with supported CeO2.The bromide concentration,contact time and ozone concentration were further studied during CeO2 /Al2O3 /O3oxidation.The catalytic ozonation showed a significant advantage over ozonation in controlling THMsFP of the water at conditions applied in this experiment.In fact,low ozone dosage of 0.7 mg·L^-1 in the catalytic ozonation can bring about a reduction of THMsFP of the filtered water by 64.9% compared with ozonation alone.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2010年第8期1323-1327,共5页
Journal of Harbin Institute of Technology
基金
天津市应用基础及前沿技术研究计划项目(10JCYBJC03500)
水体污染控制与治理科技重大专项项目(2009ZX07424-006)
南开大学青年教师及海外留学归国人员资助项目(65010371)
关键词
催化臭氧氧化
二氧化铈
负载
三卤甲烷生成势
连续流
catalytic ozonation
cerium oxide
supported
trihalomathenes formation potential
continuous flow
