2008
DOI: 10.1021/es800180f
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Photochemical Oxidation of Arsenic(III) to Arsenic(V) using Peroxydisulfate Ions as an Oxidizing Agent

Abstract: The photochemical oxidation of arsenic, As(III), to the less toxic As(V) using peroxydisulfate ions (S2O8(2-)) as the oxidizing agent under UV light irradiation was investigated. The photochemical oxidation of As(III) to As(V) assisted using peroxydisulfate ions (KPS) proved to be a simple and efficient method, and the rate of oxidation for As(III) was exceptionally high in accordance with the concentration of KPS. In this study, the UV light intensity was of primary importance for the dissociation of the KPS … Show more

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Cited by 76 publications
(39 citation statements)
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“…Especially, TiO 2 has attracted much interest because As(III) can be oxidized to As(V) in UV-illuminated TiO 2 suspension [13]. Since As(V) adsorbs more strongly on most adsorbents than As(III), the pre-oxidation of As(III) to As(V) is normally required to enhance As(III) removal [15,16]. Therefore, the nanocrystalline TiO 2 is not only an effective adsorbent for arsenic, but also an efficient photocatalyst for As(III) [13].…”
Section: Introductionmentioning
confidence: 99%
“…Especially, TiO 2 has attracted much interest because As(III) can be oxidized to As(V) in UV-illuminated TiO 2 suspension [13]. Since As(V) adsorbs more strongly on most adsorbents than As(III), the pre-oxidation of As(III) to As(V) is normally required to enhance As(III) removal [15,16]. Therefore, the nanocrystalline TiO 2 is not only an effective adsorbent for arsenic, but also an efficient photocatalyst for As(III) [13].…”
Section: Introductionmentioning
confidence: 99%
“…Most of the treatment technologies are effective in arsenate removal but it is not fully successful in the removal of arsenite . Therefore, it is necessary to oxidize arsenite to arsenate for its effective removal …”
Section: Introductionmentioning
confidence: 99%
“…In peroxosulfate‐based AOP systems, sulfate radicals (SO 4 ) can be formed through activation of PMS by UV, heat, and catalysts . For example, peroxosulfate‐based chemicals activated by UV and Fe 2+ rapidly oxidized As(III) . As a result of lower energy consumption and its recycling ability, activation of PMS by manganese oxides has attracted a lot of attention compared to UV light, thermal radiation, and transition metal ion catalysts such as Fe 2+ , Co(II), Cu(II), Mn(II), Ni(II), and Ce(III) .…”
Section: Introductionmentioning
confidence: 99%