title: Oxidative decomposition of p-nitroaniline in water by solar photo-Fenton advanced oxidation process.
abstract: The degradation of p-nitroaniline (PNA) in water by solar photo-Fenton advanced oxidation process was investigated in this study. The effects of different reaction parameters including pH value of solutions, dosages of hydrogen peroxide and ferrous ion, initial PNA concentration and temperature on the degradation of PNA have been studied. The optimum conditions for the degradation of PNA in water were considered to be: the pH value at 3.0, 10 mmol L(-1) H(2)O(2), 0.05 mmol L(-1) Fe(2+), 0.072-0.217 mmol L(-1) PNA and temperature at 20 degrees C. Under the optimum conditions, the degradation efficiencies of PNA were more than 98% within 30 min reaction. The degradation characteristic of PNA showed that the conjugated pi systems of the aromatic ring in PNA molecules were effectively destructed. The experimental results indicated solar photo-Fenton process has more advantages compared with classical Fenton process, such as higher oxidation power, wider working pH range, lower ferrous ion usage, etc. Furthermore, the present study showed the potential use of solar photo-Fenton process for PNA containing wastewater treatment.
authors: College of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan, PR China. sunsp_hj@yahoo.com.cn
authors: Jian-Hui
authors: JH
authors: Sun
authors: Sheng-Peng
authors: SP
authors: Sun
authors: Mao-Hong
authors: MH
authors: Fan
authors: Hui-Qin
authors: HQ
authors: Guo
authors: Yi-Fan
authors: YF
authors: Lee
authors: Rui-Xia
authors: RX
authors: Sun
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry* / Q000528:radiation effects*; D005296:Ferrous Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D013472:Sunlight; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects*; D018508:Water Purification / Q000379:methods
chemical_list: D000814:Aniline Compounds; D005296:Ferrous Compounds; D016877:Oxidants; D014874:Water Pollutants, Chemical; C019498:4-nitroaniline; C020748:ferrous sulfate; D006861:Hydrogen Peroxide