title: Photoproduction of hydroxyl radicals in aqueous solution with algae under high-pressure mercury lamp.
abstract: Photoproduction of hydroxyl radicals (*OH) could be induced in aqueous solution with algae (Nitzschia hantzschiana, etc.) and (or not) Fe3+ under high-pressure mercury lamp with an exposure time of 4 h. *OH was determined by HPLC using benzene as a probe. The photoproduction of *OH increased with increasing algae concentration. Fe3+ could enhance the photoproduction of *OH in aqueous solution with algae. The results showed that the photoproduction of *OH in algal solution with Fe3+ was greater than that in algal solution without Fe3+. The light intensity and pH affected the photoproduction of *OH in aqueous solution with algae with/without Fe3+. The photoproduction of *OH in aqueous solution with algae and Fe3+ under 250 W was greater than that under 125 W HPML. The photoproduction of *OH in algal solution (pH ranged from 4.0 to 7.0) with (or not) Fe3+ at pH 4 was the greatest.
authors.affiliation: Department of Environmental Science, Wuhan University, Wuhan 430072, People's Republic of China.
authors.forename: Xianli
authors.initials: X
authors.lastname: Liu
authors.forename: Feng
authors.initials: F
authors.lastname: Wu
authors.forename: Nansheng
authors.initials: N
authors.lastname: Deng
mesh_terms: D001554:Benzene / Q000032:analysis; D001673:Biodegradation, Environmental; D002851:Chromatography, High Pressure Liquid; D017377:Diatoms; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D010777:Photochemistry
chemical_list: D016877:Oxidants; D017665:Hydroxyl Radical; D001554:Benzene