Decolorization of Orange II in Aqueous Solution by an Fe(II)/sulfite System: Replacement of Persulfate
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- 作者：Long Chen ; Xinzi Peng ; Jihao Liu ; Jinjun Li ; Feng Wu
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2012
- 出版时间：October 24, 2012
- 年：2012
- 卷：51
- 期：42
- 页码：13632-13638
- 全文大小：283K
- 年卷期：v.51,no.42(October 24, 2012)
- ISSN：1520-5045
文摘
A novel process for decolorizing dyes with sulfate radicals (SO4鈥⑩€?/sup>) using an Fe(II)/sulfite system is reported in this manuscript. The objective of this study was to investigate the conditions under which Fe(II) activates Na2SO3 to produce SO4鈥⑩€?/sup> and decolorize organic dyes. Orange II, Rhodamine B, Indigo Carmine, and Reactive Brilliant Blue X-BR could be efficiently decolorized using this novel system, which was compared with the Fe(II)/persulfate and Fenton (Fe(II)/H2O2) systems. The Fe(II)/sulfite system surpassed the other two in the decolorization of these dyes, and detailed mechanisms of the Fe(II)/sulfite system were researched. Primary radical identification through quenching experiments using tert-butyl alcohol and ethanol confirmed the existence of SO4鈥⑩€?/sup>, HO鈥?/sup>, and SO5鈥⑩€?/sup>. A kinetic model was established for the halide ion effect, and kI鈥?/sup>,SO4鈥⑩€?/sup> (3.2 脳 1011 mol鈥? L s鈥?) and RSO4鈥⑩€?/sup>f (10鈥?鈥?0鈥? mol L鈥? s鈥?) were indirectly derived. In conclusion, the Fe(II)/sulfite system is a good candidate for use in detoxifying water contaminants.
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