Sulfate radicals from Fe³⁺/persulfate system for Rhodamine B degradation

Yongsheng LuSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, P.R. China, Tel. +86 21 66137748; Fax: +86 21 66137761, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]

Xingxing YangSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, P.R. China, Tel. +86 21 66137748; Fax: +86 21 66137761, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]

Lu XuSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, P.R. China, Tel. +86 21 66137748; Fax: +86 21 66137761, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]

Zhan WangSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, P.R. China, Tel. +86 21 66137748; Fax: +86 21 66137761, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]

Yunfeng XuSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, P.R. China, Tel. +86 21 66137748; Fax: +86 21 66137761, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]

Guangren QianSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai, 200444, P.R. China, Tel. +86 21 66137748; Fax: +86 21 66137761, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]

Abstract

The Fe³⁺/persulfate system for Rhodamine B (RhB) oxidative degradation has been investigated. The catalytic mechanism in the Fe³⁺/persulfate system was proposed as follows: Fe³⁺ was restored to Fe²⁺ by the generated intermediate products during the degradation process. The influence parameters were examined in batch experiments, including Fe³⁺ and persulfate concentration and initial pH. The results indicated that the Fe³⁺/persulfate system exhibited good performance for RhB degradation and followed first-order kinetics. 95.91% of the RhB was removed within 30 min under the following conditions: [Fe³⁺]₀ = 1 mM, [persulfate]₀ = 1 mM and pH 3.0. The RhB degradation efficiencies increased as the Fe³⁺ and persulfate concentrations increased. In addition, the RhB degradation was inhibited in the presence of inorganic anions, which was primarily due to a complex reaction between Fe³⁺ and various anions except for .

Keywords:

Acknowledgments

The authors appreciate technical support from the Instrumental Analysis & Research Center of Shanghai University. This study was financially supported by the National Nature Science Foundation of China (Nos. 41472312/D0218, 21107067/B070303) and the Innovative Research Team in University (No. IRT13078).

Notes

Presented at the 8th International Conference on Challenges in Environmental Science & Engineering (CESE-2015) 28 September–2 October 2015, Sydney, Australia

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Sulfate radicals from Fe³⁺/persulfate system for Rhodamine B degradation

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Sulfate radicals from Fe3+/persulfate system for Rhodamine B degradation

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Sulfate radicals from Fe³⁺/persulfate system for Rhodamine B degradation