Fe(Ⅲ)-induced UV simultaneous photocatalytic oxidation of organophosphate esters and reduction of Cr(Ⅵ)

doi:10.11835/j.issn.2096-6717.2021.071

Home > Archive>Volume 43, Issue 6, 2021 >172-179. DOI:10.11835/j.issn.2096-6717.2021.071

Fe(Ⅲ)-induced UV simultaneous photocatalytic oxidation of organophosphate esters and reduction of Cr(Ⅵ)
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                        10.11835/j.issn.2096-6717.2021.071
                    
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                        LI QiuyueLI Qiuyue
School of Environment and Energy, South China University of Technology, Guangzhou 510006
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CHEN XinranCHEN Xinran
School of Environment and Energy, South China University of Technology, Guangzhou 510006
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HUANG KaiboHUANG Kaibo
School of Environment and Energy, South China University of Technology, Guangzhou 510006
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LIANG JiahaoLIANG Jiahao
School of Environment and Energy, South China University of Technology, Guangzhou 510006
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TAO XueqinTAO Xueqin
College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225
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DANG ZhiDANG Zhi
School of Environment and Energy, South China University of Technology, Guangzhou 510006;The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006
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LU GuiningLU Guining
School of Environment and Energy, South China University of Technology, Guangzhou 510006;The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006
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Abstract:

Organophosphorus phosphate(OPEs)and hexavalent chromium (Cr(Ⅵ)) are common combined pollutants in electronic waste dismantling area.Simultaneous photooxidation of tris (2-chloroethyl) phosphate (TCEP) and photoreduction of Cr(Ⅵ) by ferric iron (Fe(Ⅲ)) in aqueous solution were studied under 300 W mercury lamp (λ=365 nm). The effects of the initial concentrations of Fe(Ⅲ), Cr(Ⅵ), and TCEP were investigated.The regeneration of Fe(Ⅲ)/Fe(Ⅱ) redox cycle in UV/Fe (Ⅲ) was studied. The applicability of UV/Fe(Ⅲ) to degradation of other OPEs was proved. The results showed that photocatalytic degradation of TCEP and reduction of Cr(Ⅵ) occurred simultaneously in UV/Fe(Ⅲ) system. The increased Fe(Ⅲ) initial concentration was beneficial to the photocatalytic reduction of Cr(Ⅵ) and the oxidation of TCEP.The reduction of Cr(Ⅵ) increased with the increasing TCEP initial concentration.However, the Cr(Ⅵ) concentrations had no significant effect on TCEP degradation.In UV/Fe(Ⅲ) system, TCEP can be degraded completely and Cr(Ⅵ) can be reduced in five cycles. Similar photocatalysis effects were observed for other OPEs. As a homogeneous photocatalytic method, UV/Fe(Ⅲ) can solve the combined pollution containing OPEs and Cr(Ⅵ) at the same time.

Key words:ferric iron;ultraviolet light;combined pollution;organophosphorus phosphate;hexavalent chromium

Reference

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李秋月,陈欣冉,黄开波,梁佳豪,陶雪琴,党志,卢桂宁.三价铁介导紫外光催化氧化有机磷酸酯同步还原六价铬[J].土木与环境工程学报（中英文）,2021,43(6):172~179

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Received:March 18,2021
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