Shanghai Key Lab of Chemical Assessment and Sustainability, Department of Chemistry, Tongji University, Shanghai 200092, People's Republic of China.
Shanghai Key Lab of Chemical Assessment and Sustainability, Department of Chemistry, Tongji University, Shanghai 200092, People's Republic of China.
Ecotoxicol Environ Saf. 2018 Aug 30;158:239-247. doi: 10.1016/j.ecoenv.2018.03.035. Epub 2018 Apr 27.
In this study, the process of transition metals (Fe, Fe, NiO) 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 Fe-PS and NiO-PS systems, and the contaminant was almost completely oxidized after 60 min. There are many similarities between the Fe-PS and Fe-PS systems, in particular the optimal removal efficiencies were achieved at n(Fe):n(PS) = 1:2 and n(Fe):n(PS) = 1:2 rather than with maximum metal dosage. The NiO dosage had positive correlation with BPA removal rate while the degradation efficiency of the Fe-PS system could be promoted by keeping n(sodium citrate):n(Fe) below 1:1. Intermediate products of the Fe-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.
在这项研究中，尝试了过渡金属（Fe、Fe、NiO）活化过硫酸盐来降解水中的双酚 A（BPA）。与热活化模式相比，在过渡金属活化模式下，在正常大气温度下即可实现显著的降解。过渡金属-过硫酸盐体系中 BPA 的去除可分为快速相（0-5 min）和慢速相（5-60 min）。在快速相中，Fe-PS 和 NiO-PS 体系中分别获得了 87.71%和 90.60%的去除效率，并且在 60 min 后污染物几乎完全被氧化。Fe-PS 和 Fe-PS 体系之间有许多相似之处，特别是在 n(Fe):n(PS) = 1:2 和 n(Fe):n(PS) = 1:2 时达到了最佳去除效率，而不是在最大金属用量时达到最佳去除效率。NiO 用量与 BPA 去除率呈正相关，而通过保持 n(柠檬酸钠):n(Fe)低于 1:1 可以促进 Fe-PS 体系的降解效率。通过 LC-MS 分析了 Fe-PS 体系的中间产物，主要为苯酚、对羟基苯乙酮、苯醌和丙二酸，因此推测了一种可能的氧化降解途径。
