Degradation of ethylbenzene by Fe(II) activated sodium percarbonate process in aqueous solution
CUI Hang1, FU Xiao-ri1, GU Xiao-gang1,2, LU Shu-guang1, QIU Zhao-fu1, SUI Qian1
1. State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Shanghai 200237, China;
2. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Ethylbenzene (EB) degradationperformance in Fe (II) activated sodium percarbonate (SPC) system was investigated in this study. The effects of various factors, such as the initial SPC and Fe (II) concentrations, anions (Cl-, HCO3-, SO42-, and NO3-) concentration, natural organic matters (NOM), and initial solution pH were evaluated. The results showed that EB (1mmol/L) could be degraded completely in 20min with both SPC and Fe (II) dosages of 12mmol/L. Both Cl- and HCO3- anions and NOM had significant inhibitive effect on EB degradation, while the influence of SO42- and NO3- was negligible at the tested ionic strength ranges. The EB removal was still significant at the initial solution pH of 9 even though the degradation of EB decreased with the increasing of initial solution pH (from 3.0 to 11.0), suggesting that Fe(II) activated SPC process was an effective technique for EB degradation at a wider pH range. In addition, the results of free radical probe tests and free radical scavenger tests indicated that ×OH was the predominant species responsible for EB degradation even though both ×OH and O2·- were generated in the SPC-Fe(II) system.
崔航, 傅晓日, 顾小钢, 吕树光, 邱兆富, 隋倩. 二价铁催化过碳酸钠处理水中乙苯[J]. 中国环境科学, 2016, 36(5): 1449-1455.
CUI Hang, FU Xiao-ri, GU Xiao-gang, LU Shu-guang, QIU Zhao-fu, SUI Qian. Degradation of ethylbenzene by Fe(II) activated sodium percarbonate process in aqueous solution. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(5): 1449-1455.
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