Degradation of bisphenol A through transition metals activating persulfate process

作者：Gao, Feng; Li, Yijiu^*; Xiang, Bo^*

来源：Ecotoxicology and Environmental Safety, 2018, 158: 239-247.

DOI：10.1016/j.ecoenv.2018.03.035

• Advanced oxidation
• Sulfate radical
• Transition metal
• Bisphenol A
• Intermediate product

In this study, the process of transition metals (Fe2+, Fe-0, Ni2O3) activating persulfate was attempted to degrade aqueous bisphonel A (BPA). Compared with thermal activation mode, significant degradation can be achieved at normal atmospheric temperature in transition metal activation mode. BPA removal in the transition metal-PS system can be divided into rapid phase (0-5 min) and slow phase (5-60 min). In rapid phase, 87.71% and 90.60% removal efficiencies were obtained in the Fe2+-PS and Ni2O3-PS systems, and the contaminant was almost completely oxidized after 60 min. There are many similarities between the Fe2+-PS and Fe-0-PS systems, in particular the optimal removal efficiencies were achieved at n(0)(Fe2+):n(0)(PS) = 1:2 and n(0)(Fe-0):n(0)(PS) = 1:2 rather than with maximum metal dosage. The Ni2O3 dosage had positive correlation with BPA removal rate while the degradation efficiency of the Fe2+-PS system could be promoted by keeping no(sodium citrate):n(0)(Fe2+) below 1:1. Intermediate products of the Fee(2+)-PS system were analyzed by LC-MS and were predominantly phenol, p-hydroxyacetophenone, benzoquinone and propanedioic acid, therefore a possible oxidation degradation pathway was speculated.

• 出版日期2018-8-30
• 单位同济大学