Iron(III) photoinduced degradation: Catalytic method for 4,4′-diaminostilbene-2,2′-disulfonic acid removal from water
The Fe(III)-photoinduced degradation of 4,4′-diaminostilbene-2,2′-disulfonic acid (DSD), used as a model compound of fluorescent whitening agents, was investigated in aqueous solution. The mixing of DSD and iron(III) solutions immediately led to DSD degradation into two oxidation products 5-amino-2-...
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| Format: | Article |
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Wiley
2003-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X03000102 |
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| author | Pascal Wong-Wah-Chung Gilles Mailhot Michèle Bolte |
| author_facet | Pascal Wong-Wah-Chung Gilles Mailhot Michèle Bolte |
| author_sort | Pascal Wong-Wah-Chung |
| collection | DOAJ |
| description | The Fe(III)-photoinduced degradation of 4,4′-diaminostilbene-2,2′-disulfonic acid (DSD), used as a model compound of fluorescent whitening agents, was investigated in aqueous solution. The mixing
of DSD and iron(III) solutions immediately led to DSD degradation into two oxidation products 5-amino-2-
formyl-benzene sulfonic acid (1) and DSD epoxide (2) together with the formation of Fe(II). The behaviour
of the latter solution was investigated under monochromatic excitation at 365 nm. The irradiation of the
solution resulted in a photoredox process that yielded Fe(II) and HO• radicals; [Fe(H2O)5(OH)]2+ being the most photoactive species. The disappearances of the oxidation products were shown to only involve the
attack of HO• radicals; the quantum yields of disappearances are wavelength dependent as the formation
of the hydroxyl radicals is. For prolonged irradiation, the total mineralisation of the oxidation products
was achieved with the formation of sulphate and ammonium ions. The half-lives of products 1 and 2 when
submitted to such a process under solar irradiation were estimated to be respectively 12 and 11 min in the
mixture with 100% of monomeric species [Fe(H2O)5(OH)]2+. Under these conditions, the total mineralisation is reached within 2 days of exposure. |
| format | Article |
| id | doaj-art-488bfbde9baa4bff98437c1ee3d74d3c |
| institution | Kabale University |
| issn | 1110-662X |
| language | English |
| publishDate | 2003-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-488bfbde9baa4bff98437c1ee3d74d3c2025-02-03T06:07:54ZengWileyInternational Journal of Photoenergy1110-662X2003-01-0151374210.1155/S1110662X03000102Iron(III) photoinduced degradation: Catalytic method for 4,4′-diaminostilbene-2,2′-disulfonic acid removal from waterPascal Wong-Wah-Chung0Gilles Mailhot1Michèle Bolte2Laboratoire de Photochimie Moléculaire et Macromoléculaire, 24 avenue des Landais, Université Blaise Pascal, CNRS, UMR 6505, Aubière Cedex F-63177, FranceLaboratoire de Photochimie Moléculaire et Macromoléculaire, 24 avenue des Landais, Université Blaise Pascal, CNRS, UMR 6505, Aubière Cedex F-63177, FranceLaboratoire de Photochimie Moléculaire et Macromoléculaire, 24 avenue des Landais, Université Blaise Pascal, CNRS, UMR 6505, Aubière Cedex F-63177, FranceThe Fe(III)-photoinduced degradation of 4,4′-diaminostilbene-2,2′-disulfonic acid (DSD), used as a model compound of fluorescent whitening agents, was investigated in aqueous solution. The mixing of DSD and iron(III) solutions immediately led to DSD degradation into two oxidation products 5-amino-2- formyl-benzene sulfonic acid (1) and DSD epoxide (2) together with the formation of Fe(II). The behaviour of the latter solution was investigated under monochromatic excitation at 365 nm. The irradiation of the solution resulted in a photoredox process that yielded Fe(II) and HO• radicals; [Fe(H2O)5(OH)]2+ being the most photoactive species. The disappearances of the oxidation products were shown to only involve the attack of HO• radicals; the quantum yields of disappearances are wavelength dependent as the formation of the hydroxyl radicals is. For prolonged irradiation, the total mineralisation of the oxidation products was achieved with the formation of sulphate and ammonium ions. The half-lives of products 1 and 2 when submitted to such a process under solar irradiation were estimated to be respectively 12 and 11 min in the mixture with 100% of monomeric species [Fe(H2O)5(OH)]2+. Under these conditions, the total mineralisation is reached within 2 days of exposure.http://dx.doi.org/10.1155/S1110662X03000102 |
| spellingShingle | Pascal Wong-Wah-Chung Gilles Mailhot Michèle Bolte Iron(III) photoinduced degradation: Catalytic method for 4,4′-diaminostilbene-2,2′-disulfonic acid removal from water International Journal of Photoenergy |
| title | Iron(III) photoinduced degradation: Catalytic method for 4,4′-diaminostilbene-2,2′-disulfonic acid removal from water |
| title_full | Iron(III) photoinduced degradation: Catalytic method for 4,4′-diaminostilbene-2,2′-disulfonic acid removal from water |
| title_fullStr | Iron(III) photoinduced degradation: Catalytic method for 4,4′-diaminostilbene-2,2′-disulfonic acid removal from water |
| title_full_unstemmed | Iron(III) photoinduced degradation: Catalytic method for 4,4′-diaminostilbene-2,2′-disulfonic acid removal from water |
| title_short | Iron(III) photoinduced degradation: Catalytic method for 4,4′-diaminostilbene-2,2′-disulfonic acid removal from water |
| title_sort | iron iii photoinduced degradation catalytic method for 4 4 diaminostilbene 2 2 disulfonic acid removal from water |
| url | http://dx.doi.org/10.1155/S1110662X03000102 |
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