title: Role of ferric and ferrous ions in the enhancement of the heterogeneous solar photocatalytic degradation of combined mixture of chlorophenols.
abstract: The solar photocatalytic degradation of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) was investigated individually and combined in the presence of Fe2+ and Fe3+ ions. The results revealed that both Fe2+ and Fe3+ ions enhanced the heterogeneous photocatalytic degradation. Fe3+ ions rapidly converted to Fe2+ ions as soon as the irradiation started. The intermediates formed during the degradation of 4-CP/2,4-DCP were also monitored and identified. Three main intermediates were observed, hydroquinone, phenol, and 4-chlorocatechol with traces of benzoquinone. The results support a new trend of research by utilising other cheap iron ion sources in the photocatalytic degradation.
authors.affiliation: Department of Chemical Engineering, Curtin University, GPO Box U1987 Perth, WA 6845, Australia E-mail: h.znad@curtin.edu.au.
authors.forename: Abdulbasit M
authors.initials: AM
authors.lastname: Abeish
authors.affiliation: Department of Chemical Engineering, Curtin University, GPO Box U1987 Perth, WA 6845, Australia E-mail: h.znad@curtin.edu.au.
authors.forename: H Ming
authors.initials: HM
authors.lastname: Ang
authors.affiliation: Department of Chemical Engineering, Curtin University, GPO Box U1987 Perth, WA 6845, Australia E-mail: h.znad@curtin.edu.au.
authors.forename: Hussein
authors.initials: H
authors.lastname: Znad
mesh_terms: D002396:Catechols; D002712:Chlorides / Q000737:chemistry*; D002733:Chlorophenols / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D006873:Hydroquinones; D007477:Ions; D007501:Iron / Q000737:chemistry; D010782:Photolysis; D013472:Sunlight; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D002396:Catechols; D002712:Chlorides; D002733:Chlorophenols; D005290:Ferric Compounds; D005296:Ferrous Compounds; D006873:Hydroquinones; D007477:Ions; D014874:Water Pollutants, Chemical; C020748:ferrous sulfate; C029107:4-chlorophenol; D007501:Iron; C038861:4-chlorocatechol; C004762:2,4-dichlorophenol; C024555:ferric chloride; C031927:hydroquinone