| Photo-induced transformations of Hg(Ⅱ) species in the presence of Nitzschia hantzschiana,ferric ion,and humic acid |
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| 作者姓名： | Lin Deng Nansheng Deng Liwei Mou Fangtong Zhu |
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| 作者单位： | Lin Deng,Liwei Mou,Fangtong Zhu(Department of Municipal Engineering,Southeast University, Nanjing 210096, China);Nansheng Deng(School of Resources and Environmental Science, Wuhan University, Wuhan 430072, China) |
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| 基金项目： | supported by the National Natural Science Foundation of China (No.20477031);;the National Natural Science Foundation of China (NSFC);;the Russian Foundation for Basic Research (RFBR)Cooperation Project (2004-2005) |
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| 摘 要： | Effects of algae Nitzschia hantzschiana, Fe(Ⅲ) ions, humic acid, and pH on the photochemical reduction of Hg(Ⅱ) using the irradiation of metal halide lamps (λ 365 nm, 250 W) were investigated. The photoreduction rate of Hg(Ⅱ) was found to increase with increasing concentrations of algae, Fe(Ⅲ) ions, and humic acid. Alteration of pH value affected the photoreduction of Hg(Ⅱ) in aqueous solution with or without algae. The photoreduction rate of Hg(II) decreased with increasing initial Hg(Ⅱ) concentration in aqueous solution in the presence of algae. The photochemical kinetics of initial Hg(Ⅱ) and algae concentrations on the photoreduction of Hg(Ⅱ) were studied at pH 7.0. The study on the total Hg mass balance in terms of photochemical process revealed that more than 42% of Hg(Ⅱ) from the algal suspension was reduced to volatile metallic Hg under the conditions investigated.
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| 关 键 词： | photoreduction Nitzschia hantzschiana Hg（Ⅱ） Fe（Ⅲ） humic acid |
| 收稿时间： | 19 March 2009 |
| 修稿时间： | 22 May 2009 |
Photo-induced transformations of Hg(II) species in the presence of Nitzschia
hantzschiana, ferric ion, and humic acid |
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| Lin Deng,Nansheng Deng,Liwei Mou,Fangtong Zhu.Photo-induced transformations of Hg(II) species in the presence of Nitzschia
hantzschiana, ferric ion, and humic acid[J].Journal of Environmental Sciences,2010,22(1):76-83. |
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| Authors: | Lin Deng Nansheng Deng Liwei Mou and Fangtong Zhu |
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| Institution: | 1. Department of Municipal Engineering,Southeast University, Nanjing 210096, China
2. School of Resources and Environmental Science, Wuhan University, Wuhan 430072, China |
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| Abstract: | Effects of algae Nitzschia hantzschiana, Fe(III) ions, humic acid, and pH on the photochemical reduction of Hg(II) using the
irradiation of metal halide lamps ( > 365 nm, 250 W) were investigated. The photoreduction rate of Hg(II) was found to increase
with increasing concentrations of algae, Fe(III) ions, and humic acid. Alteration of pH value a ected the photoreduction of Hg(II) in
aqueous solution with or without algae. The photoreduction rate of Hg(II) decreased with increasing initial Hg(II) concentration in
aqueous solution in the presence of algae. The photochemical kinetics of initial Hg(II) and algae concentrations on the photoreduction
of Hg(II) were studied at pH 7.0. The study on the total Hg mass balance in terms of photochemical process revealed that more than
42% of Hg(II) from the algal suspension was reduced to volatile metallic Hg under the conditions investigated. |
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| Keywords: | photoreduction Nitzschia hantzschiana Hg(II) Fe(III) humic acid |
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