title: Degradation of Reactive Yellow X-RG by O3/Fenton system: response surface approach, reaction mechanism, and degradation pathway.
abstract: O3/Fenton for the treatment of effluent containing Reactive Yellow X-RG is investigated. The response surface methodology is applied to study the main and interactive effects of the parameters. With the initial dye concentration being controlled at 300 mg L-1, the optimized conditions for wastewater treatment are 3.68, 29.19 and 18.49 mg min-1for initial pH, mole ratio of [H2O2]/[Fe2+] and ozone dosage, respectively. The regression quadratic model well describing the degradation efﬁciency of O3/Fenton process is developed and validated by the analysis of variances, respectively. In addition, a possible pathway for Reactive Yellow X-RG degradation is proposed by detecting the temporal evolution of intermediates in the solution, with the use of some techniques including ultraviolet spectrophotometric method (UV-Vis), Fourier transform infrared spectroscopy (FT-IR) and gas chromatography-mass spectrometry (GC/MS). Meanwhile, every reaction step is given to explain the degradation mechanisms.
authors.affiliation: School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China E-mail: shenyj@ntu.edu.cn.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Shen
authors.affiliation: School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China E-mail: shenyj@ntu.edu.cn.
authors.forename: Qihui
authors.initials: Q
authors.lastname: Xu
authors.affiliation: School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China E-mail: shenyj@ntu.edu.cn; School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liang
authors.affiliation: School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China E-mail: shenyj@ntu.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014227:Triazines / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D006861:Hydrogen Peroxide; D007501:Iron; D010126:Ozone; D014227:Triazines; D062065:Wastewater; D014874:Water Pollutants, Chemical; C038296:reactive yellow 4