Degradation of bisphenol A by the UV/H2O2 process: a kinetic study

被引:7
作者
de Araujo, Leandro Goulart [1 ]
Oscar Conte, Leandro [2 ,3 ]
Violeta Schenone, Agustina [2 ,3 ]
Alfano, Orlando Mario [2 ,3 ]
Teixeira, Antonio Carlos Silva Costa [1 ]
机构
[1] Univ Sao Paulo, Dept Chem Engn, Res Grp Adv Oxidat Proc AdOx, Av Prof Luciano Gualberto,Travessa 3,380, BR-05508900 Sao Paulo, SP, Brazil
[2] Univ Nacl Litoral, Ind Quim INTEC, Inst Desarrollo Tecnol, Predio CONICET Dr AE Cassano RN 168, RA-3000 Santa Fe, Argentina
[3] Consejo Nacl Invest Cient & Tecn, Predio CONICET Dr AE Cassano RN 168, RA-3000 Santa Fe, Argentina
关键词
Advanced oxidation process; UV; H2O2; Bisphenol A; Kinetic modeling; Optimization; ADVANCED OXIDATION PROCESSES; FENTON OXIDATION; WASTE-WATER; UV; DECOMPOSITION; OZONATION; FATE; PHOTOLYSIS; ESTROGENS; CHEMICALS;
D O I
10.1007/s11356-019-07361-7
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A theoretical and experimental study of bisphenol A (BPA) degradation by the UV/H2O2 process in water is presented. The effects of the H2O2 concentration and the specific rate of photon emission (E-P,E-0) on BPA degradation were investigated. A kinetic model derived from a reaction sequence was employed to predict BPA and hydrogen peroxide concentrations over time using an annular photochemical reactor in batch recirculation mode. The local volumetric rate of photon absorption (LVRPA) inside the photoreactor was computed using a Line Source with Parallel Plane emission model (LSPP). From the proposed kinetic model and the experimental data, the second order rate constants of the reactions between hydroxyl radicals and the main reacting species (H2O2 and BPA) were estimated applying a nonlinear regression method. A good agreement between the kinetic model and experimental data, for a wide range of operating conditions, was obtained. For BPA, H2O2, and TOC concentrations, the calculated root means square errors (RMSE) were 2.3 x 10(- 2), 9.8 x 10(- 1), and 9.0 x 10(- 2) mmol L- 1, respectively. The simplified kinetic model presented in this work can be directly applied to scaling-up and reactor design, since the estimated kinetic constants are independent of the reactor size, shape, and configuration. Further experiments were made by employing low BPA initial concentration (100 mu g L- 1) in water and real wastewater. A lower degradation rate of BPA was observed in the real wastewater, although the UV/H2O2 process has also been able to completely degrade the target pollutant in less than 1 h.
引用
收藏
页码:7299 / 7308
页数:10
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