Oxidation Degradation of Rhodamine B in Aqueous by UV/S2O8 2− Treatment System
The UV photolysis of persulfate (S2O8 2−) is a novel advanced oxidation technologies (AOTs), which leads to the formation of strong oxidizing radicals, sulfate radicals (SO4 •−). The effect of oxidant S2O8 2− concentration, initial dye concentration, initial pH of solution, and various inorganic ani...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2012/754691 |
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| author | Xiaoyang Chen Zhiyong Xue Yanlai Yao Weiping Wang Fengxiang Zhu Chunlai Hong |
| author_facet | Xiaoyang Chen Zhiyong Xue Yanlai Yao Weiping Wang Fengxiang Zhu Chunlai Hong |
| author_sort | Xiaoyang Chen |
| collection | DOAJ |
| description | The UV photolysis of persulfate (S2O8 2−) is a novel advanced oxidation technologies (AOTs), which leads to the formation of strong oxidizing radicals, sulfate radicals (SO4 •−). The effect of oxidant S2O8 2− concentration, initial dye concentration, initial pH of solution, and various inorganic anions (Cl−, H2PO4 −, and HCO3 −) were investigated using Rhodamine B (RhB), a kind of xanthene dye, as a model pollutant. With the increase of oxidant S2O8 2−, more SO4 •− produced to attack RhB molecules and result in the increase of RhB degradation. While the improvement was not sustained above a critical value, beyond which degradation rate does not increase. Initial pH of solution had great effect on the RhB degradation rate during UV/S2O8 2− system. SO4 •− is rather stable in acidic solutions, while increasing system pH results in the transformation of SO4 •− to •OH. The effects of three inorganic anions (Cl−, H2PO4 −, and HCO3 −) all had some negative effect on the degradation of RhB. Based on the RhB solution changes of the UV-vis absorption intensity during the UV/S2O8 2− treatment, decolorization of RhB accompanied the destruction of aromatic ring structures of RhB molecules. |
| format | Article |
| id | doaj-art-99d8cb87827b4b52b274f4dd86e48471 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-99d8cb87827b4b52b274f4dd86e484712025-02-03T01:30:14ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/754691754691Oxidation Degradation of Rhodamine B in Aqueous by UV/S2O8 2− Treatment SystemXiaoyang Chen0Zhiyong Xue1Yanlai Yao2Weiping Wang3Fengxiang Zhu4Chunlai Hong5Institute of Environmental Resource and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, ChinaInstitute of Environmental Resource and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, ChinaInstitute of Environmental Resource and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, ChinaInstitute of Environmental Resource and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, ChinaInstitute of Environmental Resource and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, ChinaInstitute of Environmental Resource and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, ChinaThe UV photolysis of persulfate (S2O8 2−) is a novel advanced oxidation technologies (AOTs), which leads to the formation of strong oxidizing radicals, sulfate radicals (SO4 •−). The effect of oxidant S2O8 2− concentration, initial dye concentration, initial pH of solution, and various inorganic anions (Cl−, H2PO4 −, and HCO3 −) were investigated using Rhodamine B (RhB), a kind of xanthene dye, as a model pollutant. With the increase of oxidant S2O8 2−, more SO4 •− produced to attack RhB molecules and result in the increase of RhB degradation. While the improvement was not sustained above a critical value, beyond which degradation rate does not increase. Initial pH of solution had great effect on the RhB degradation rate during UV/S2O8 2− system. SO4 •− is rather stable in acidic solutions, while increasing system pH results in the transformation of SO4 •− to •OH. The effects of three inorganic anions (Cl−, H2PO4 −, and HCO3 −) all had some negative effect on the degradation of RhB. Based on the RhB solution changes of the UV-vis absorption intensity during the UV/S2O8 2− treatment, decolorization of RhB accompanied the destruction of aromatic ring structures of RhB molecules.http://dx.doi.org/10.1155/2012/754691 |
| spellingShingle | Xiaoyang Chen Zhiyong Xue Yanlai Yao Weiping Wang Fengxiang Zhu Chunlai Hong Oxidation Degradation of Rhodamine B in Aqueous by UV/S2O8 2− Treatment System International Journal of Photoenergy |
| title | Oxidation Degradation of Rhodamine B in Aqueous by UV/S2O8 2− Treatment System |
| title_full | Oxidation Degradation of Rhodamine B in Aqueous by UV/S2O8 2− Treatment System |
| title_fullStr | Oxidation Degradation of Rhodamine B in Aqueous by UV/S2O8 2− Treatment System |
| title_full_unstemmed | Oxidation Degradation of Rhodamine B in Aqueous by UV/S2O8 2− Treatment System |
| title_short | Oxidation Degradation of Rhodamine B in Aqueous by UV/S2O8 2− Treatment System |
| title_sort | oxidation degradation of rhodamine b in aqueous by uv s2o8 2 treatment system |
| url | http://dx.doi.org/10.1155/2012/754691 |
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