标題: Calcium Sulfite Solids Activated by Iron for Enhancing As(III) Oxidation in Water

作者: Cai, MJ (Cai, Minjuan); Quan, S (Quan, Sen); Li, JJ (Li, Jinjun); Wu, F (Wu, Feng); Mailhot, G (Mailhot, Gilles)

來源出版物: MOLECULES  卷: 26  期: 4  文獻号: 1154  DOI: 10.3390/molecules26041154  出版年: FEB 2021  

摘要: Desulfurized gypsum (DG) as a soil modifier imparts it with bulk solid sulfite. The Fe(III)-sulfite process in the liquid phase has shown great potential for the rapid removal of As(III), but the performance and mechanism of this process using DG as a sulfite source in aqueous solution remains unclear. In this work, employing solid CaSO3 as a source of SO32-, we have studied the effects of different conditions (e.g., pH, Fe dosage, sulfite dosage) on As(III) oxidation in the Fe(III)-CaSO3 system. The results show that 72.1% of As(III) was removed from solution by centrifugal treatment for 60 min at near-neutral pH. Quenching experiments have indicated that oxidation efficiencies of As(III) are due at 67.5% to HO center dot, 17.5% to SO5 center dot- and 15% to SO4 center dot-. This finding may have promising implications in developing a new cost-effective technology for the treatment of arsenic-containing water using DG.

入藏号: WOS:000624173900001

PubMed ID: 33670050

語言: English

文獻類型: Article

作者關鍵詞: desulfurized gypsum; Fe(III); CaSO3; As(III); resource utilization

地址: [Cai, Minjuan; Quan, Sen; Li, Jinjun; Wu, Feng] Wuhan Univ, Hubei Key Lab Biomass Resource Chem & Environm Bi, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

[Quan, Sen] Hubei Acad Environm Sci, Wuhan 430072, Peoples R China.

[Mailhot, Gilles] Univ Clermont Auvergne, CNRS, SIGMA Clermont, Inst Chim Clermont Ferrand, F-63000 Clermont Ferrand, France.

通訊作者地址: Quan, S (通訊作者)，Wuhan Univ, Hubei Key Lab Biomass Resource Chem & Environm Bi, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

Quan, S (通訊作者)，Hubei Acad Environm Sci, Wuhan 430072, Peoples R China.

電子郵件地址: caiminjuan@whu.edu.cn; quansen@whu.edu.cn; lijinjun@whu.edu.cn; fengwu@whu.edu.cn; gilles.mailhot@uca.fr

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