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紫外光和活性炭对有机物臭氧化的协同催化作用
引用本文:陈 瑛,郭二民,黄国忠,张建祺,宋存义.紫外光和活性炭对有机物臭氧化的协同催化作用[J].环境科学研究,2007,20(1):90-94.
作者姓名:陈 瑛  郭二民  黄国忠  张建祺  宋存义
作者单位:1. 北京科技大学,土木与环境工程学院,北京,100083
2. 国家环境保护总局,环境工程评估中心,北京,100012
3. 美国马里兰州立大学,巴尔的摩郡分校土木环境工程系,美国,巴尔的摩,MD,21250
摘    要:以城市二级出水中微量有机污染物为处理的目标物质,通过静态试验分别考察了不同催化条件下臭氧对水中有机污染物的降解效果.结果表明:协同催化反应器对水体在254 nm处紫外吸光度(E254)的去除率达87.40%,对CODCr的去除率可达59.79%,对臭氧的利用率可达到91.4%,因此,254 nm紫外光和活性炭对水中微量有机污染物的臭氧化过程具有协同催化作用,并大大提高了系统对臭氧的利用率;受OH-影响,碱性条件下O3/UV/C工艺对CODcr和E254的去除效果好于中性和酸性条件;不同自由基捕捉剂对臭氧化过程的影响证明,在紫外光和活性炭的协同催化作用下,臭氧分解出以羟基自由基为主的多种氧化性自由基,因此水中有机污染物的氧化降解是多种自由基反应的结果.

关 键 词:臭氧  紫外辐射  活性炭  协同催化作用  紫外光  活性炭  有机物  臭氧化  同催化作用  Process  Ozonation  Organic  Compound  Active  Carbon  Catalysis  催化反应器  氧化降解  氧化性自由基  羟基自由基  臭氧分解  捕捉剂  酸性条件  去除效果  工艺  碱性条件
文章编号:1001-6929(2007)01-0090-05
修稿时间:2006-05-08

The Investigation of Synergetic Catalysis of UV and Active Carbon in Organic Compound Ozonation Process
CHEN Ying,GUO Er-min,HUANG Guo-zhong,CHANG Cheinchi and SONG Cun-yi.The Investigation of Synergetic Catalysis of UV and Active Carbon in Organic Compound Ozonation Process[J].Research of Environmental Sciences,2007,20(1):90-94.
Authors:CHEN Ying  GUO Er-min  HUANG Guo-zhong  CHANG Cheinchi and SONG Cun-yi
Institution:1. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China; 2. Appraisal Center for Environment and Engineering, State Environmental Protection Administration, Beijing 100012, China; 3. Civil and Environmental Engineering Department, University of Maryland Baltimore College, Baltimore MD 21250, U.S.A
Abstract:Micro-concentration recalcitrant organic contaminants in water were selected as target substance.The water from final clarifier was selected as original water containing micro-concentration recalcitrant organic contaminants.The results of captive test showed that,in the O_3/UV/C reactor,the removal efficiency of ultraviolet absorbency at 254 nm(E_(254)) and COD_(Cr) can be up to(87.40%) and(59.79%,) respectively.The effect of ozone using can be up to(91.4%.) Therefore,the 254 nm ultraviolet and active carbon have synergetic catalysis to ozonation processes and can improve the effect of ozone using remarkably.Affected by OH~-,the COD_(Cr) and E_(254) degradation effects of O_3/UV/C technique in alkaline condition were better than in neutral and acidic conditions.The influence of different radical scavengers to ozonation process was investigated;the results show that ozone decomposes several kinds of free radicals while hydroxide radical is the most.Therefore,the ozonation degradation of organic contaminants in the water from final clarifier is due to these kinds of radical reactions.
Keywords:ozone  UV radiation  active carbon  synergetic catalysis
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