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篇目详细内容 |
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【篇名】 |
Complexation of iron by salicylic acid and its effect on atrazine photodegradation in aqueous solution |
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【刊名】 |
Frontiers of Environmental Science and Engineering in China |
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【刊名缩写】 |
Front.Environ.Sci.Engin.China |
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【ISSN】 |
1673-7415 |
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【EISSN】 |
1673-7520 |
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【DOI】 |
10.1007/s11783-010-0018-3 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2010 |
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【卷期】 |
4
卷2期 |
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【页码】 |
157-163
页,共
7
页 |
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【作者】 |
Xiaoxia OU;
Chong WANG;
Fengjie ZHANG;
Xie QUAN;
Yan MA;
He LIU;
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【关键词】 |
salicylic acid; iron; atrazine; photodegradation |
【摘要】 |
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The photodegradation of atrazine and the photochemical formation of Fe(II) and H2O2 in aqueous solutions containing salicylic acid and Fe(III) were studied under simulated sunlight irradiation. Atrazine photolysis followed first-order reaction kinetics, and the rate constant (k) corresponding to the solution of Fe(III)-salicylic acid complex (Fe(III)-SA) was only 0.0153 h−1, roughly one eighth of the k observed in the Fe(III) alone solution (0.115 h−1). Compared with Fe(III) solution, the presence of€ salicylic€ acid€ significantly€ enhanced€ the€ formation€ of Fe(II) but greatly decreased H2O2 generation, and their subsequent product, hydroxyl radical (·OH), was much less, accounting for the low rate of atrazine photodegradation in Fe(III)-SA solution. The interaction of Fe(III) with salicylic acid was analyzed using Fourier-transform infrared (FTIR) spectroscopy and UV-visible absorption, indicating that Fe(III)-salicylic acid complex could be formed by ligand exchange between the hydrogen ions in salicylic acid and Fe(III) ions. |
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