caa a22 4500 463162307 CHVBK 20180406164751.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10311-007-0096-z doi (NATIONALLICENCE)springer-10.1007/s10311-007-0096-z Photocatalytic degradation of chlorophenols using Ru(bpy) 3 2+ /S2O 8 2− [Elektronische Daten] [M. Silva, H. Burrows, S. Formosinho, L. Alves, A. Godinho, M. Antunes, D. Ferreira] Advanced oxidation processes, such as photocatalysed oxidation, provide an important route for degradation of wastes. In this study, the lowest excited state (3MLCT) of Ru(bpy) 3 2+ is used to break down chlorophenol pollutant molecules to harmless products. This has the advantage of using visible light and a short-lived catalytically active species. Photolysis of deaerated aqueous solutions of a variety of mono- and poly-substituted chlorophenols has been followed in the presence of Ru(bpy) 3 2+ /S2O 8 2− with near visible light (λ>350nm) by UV/visible absorption spectroscopy, luminescence, potentiometry, NMR and HPLC techniques. Upon irradiation, a decrease is observed in the chlorophenol concentration, accompanied by the formation of Cl−, H+ and SO 4 2− ions as the main inorganic products. Benzoquinone, phenol, dihydroxybenzenes and chlorinated compounds were the dominant organic products. As the ruthenium(II) complex is regenerated in the reaction, the scheme corresponds to an overall catalytic process. The kinetics of the rapid chlorophenol photodechlorination has been studied, and are described quite well by pseudo-first order behaviour. Further studies on this were made by following Cl− release with respect to the initial Ru(bpy) 3 2+ and S2O 8 2− concentrations. A comparison is presented of the photodechlorination reactivity of the mono and polychlorophenols studied at acidic and alkaline pH. Springer-Verlag, 2007 Photolysis nationallicence Ru(bpy) 3 2+ nationallicence Photodegradation/photodechlorination nationallicence Chlorophenols nationallicence Kinetics nationallicence Silva M. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut Burrows H. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut Formosinho S. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut Alves L. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut Godinho A. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut Antunes M. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut Ferreira D. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut Environmental Chemistry Letters Springer-Verlag 5/3(2007-08-01), 143-149 1610-3653 5:3<143 2007 5 10311 https://doi.org/10.1007/s10311-007-0096-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10311-007-0096-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Silva M. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut NATIONALLICENCE 700 1- Burrows H. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut NATIONALLICENCE 700 1- Formosinho S. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut NATIONALLICENCE 700 1- Alves L. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut NATIONALLICENCE 700 1- Godinho A. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut NATIONALLICENCE 700 1- Antunes M. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut NATIONALLICENCE 700 1- Ferreira D. Chemistry Department, FCTUC, University of Coimbra, 3004-535, Coimbra, Portugal aut NATIONALLICENCE 773 0- Environmental Chemistry Letters Springer-Verlag 5/3(2007-08-01), 143-149 1610-3653 5:3<143 2007 5 10311 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer