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    陈硕

    • 教授     博士生导师   硕士生导师
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:环境学院
    • 学科:环境工程. 环境科学
    • 办公地点:大连理工大学环境学院B717
    • 联系方式:0411-84706263
    • 电子邮箱:shuochen@dlut.edu.cn

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    Photoinductive activity of humic acid fractions with the presence of Fe(III): The role of aromaticity and oxygen groups involved in fractions

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    论文类型:期刊论文

    发表时间:2008-06-01

    发表刊物:CHEMOSPHERE

    收录刊物:SCIE、EI、PubMed

    卷号:72

    期号:6

    页面范围:925-931

    ISSN号:0045-6535

    关键字:humic acids fraction; size exclusion chromatography; iron; atrazine; photodegradation

    摘要:Relationship between the photoinductive activity and the properties of humic acids (HA) fractions were investigated with and without Fe(III). Three fractions were separated based on the molecular weight (M-w) and were obtained following the order of N-w: F-A > F-B > F-C. Compared to F-A and F-B, photodegradation of atrazine under simulated sunlight was much faster in solution containing F-C, whose structure was dominated inated by greater aromaticity, more oxygen groups and fluorophores. The interaction of HA fractions and Fe(III) was studied using fluorescence spectrometry and F-C had the largest quenching constant. The capacity of electron transfer, estimated from the amount of photoformed Fe(II), was also highest for F-C. Thus, the Fe(III)-F-C complex was efficient in phototransformation of atrazine in nearly neutral aqueous solutions. These results suggest that the aromaticity and oxygen groups content of HA exert great influence on the binding ability of metals and on the fate of pollutants in natural waters. (C) 2008 Elsevier Ltd. All rights reserved.