Abstract：The phenol oxidation by sulfate free radical (SO4·-) formed in the activation of persulfate by citric acid chelated ferrous ion (CA-Fe(II)) was investigated in this study. The influence of different factors, such as CA/Fe(II) molar ratio, Fe(II) concentration, initial S2O82- molar amount and phenol concentration on the kinetics of phenol oxidation by chelated Fe(II) activated persulfate was described in detail. Results indicated that the removal efficiency of phenol was significantly increased with increasing persulfate dosage, but decreased with increasing initial phenol concentration. A CA/Fe (II) molar ratio of 1/5contributed to phenol removal on maintaining sufficient quantities of available Fe (II) in solution. The highest phenol removal (98%) can be obtained within a 15min with the PS/CA/Fe (II)/phenol molar ratio of 100/10/50/1 and the highest oxidation rate (0.430min-1) was gained. The phenol oxidation by chelated ferrous ion activated persulfate followed the pseudo-first-order kinetics reaction. With the CA/Fe(II)/phenol molar ratio of 10/50/1, the phenol oxidation rate constant exhibited a linear trend as a function of initial persulfate concentration, R2 = 0.953.
刘佳露, 卢伟, 张凤君, 苏小四, 朱永娟, 李仁声, 吕聪. 活化过硫酸盐氧化地下水中苯酚的动力学研究[J]. 中国环境科学, 2015, 35(9): 2677-2681.
LIU Jia-Lu, LU Wei, ZHANG Feng-Jun, SU Xiao-Si, ZHU Yong-Juan, LI Ren-Sheng, 吕Cong . Kinetics study of activated persulfate oxidation of phenol in ground water. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2677-2681.
