Rapid catalytic oxidation of arsenite to arsenate in an iron(III)/sulfite system under visible light
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- 作者：Jing Xua ; b ; Wei Dinga ; Feng Wua ; fengwu@whu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Gilles Mailhotc ; Danna Zhoud ; Khalil Hannab ; khalil.hanna@ensc-rennes.fr" class="auth_mail" title="E-mail the corresponding author
- 关键词：Arsenic ; Iron(III)/sulfite ; Solar light ; Photooxidation ; Oxysulfur radicals
- 刊名：Applied Catalysis B: Environmental
- 出版年：2016
- 出版时间：5 June 2016
- 年：2016
- 卷：186
- 期：Complete
- 页码：56-61
- 全文大小：817 K
文摘
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Visible light is efficient to induce As(III) oxidation in Fe(III)/sulfite system.
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High oxidation and removal rates of As(III) is achieved at pH 6.
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Mechanism of As(III) oxidation involved both hydroxyl and oxysulfur radicals.
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As(III) can sorb to Fe-particles and then be oxidized through LMCT process.
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Sequential addition of sulfite is beneficial to improve the As(III) oxidation.