Oxidative degradation of Bisphenol A by carbocatalytic activation of persulfate and peroxymonosulfate with reduced graphene oxide
Oxidative degradation of Bisphenol A by carbocatalytic activation of persulfate and peroxymonosulfate with reduced graphene oxide
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DOI：
10.1016/j.jhazmat.2018.07.098
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发表时间：
2018-10-15
影响因子：
13.6
通讯作者：
Ozcelik, Duygu Yesiltepe
中科院分区：
文献类型：
--
作者：
Olmez-Hanci, Tugba;Arslan-Alaton, Idil;Ozcelik, Duygu Yesiltepe
在本研究中，研究了用还原氧化石墨烯（rGO）对过硫酸盐（PS）和过一硫酸盐进行新型无金属活化，以降解不同水基质（即蒸馏水（DW）和城市污水处理厂废水（TWW））中最重要的内分泌干扰化合物之一的双酚A（BPA）。对自制的 rGO 进行了表征，并检查了氧化剂（PS 和 PMS）和催化剂（rGO）浓度对 DW 和 TWW 样品中 BPA 降解率的影响。 PS/rGO 处理系统在 10 分钟和 30 分钟后，DW 和 TWW 中的 BPA 分别发生完全降解，而在相同的处理时间内，PMS/rGO 的 BPA 去除率为 94% (DW) 和 83% (TWW)（BPA = 2 mg/L；rGO = 0.02 g/L；PS = 0.25 mM；PMS = 0.5 mM）。自由基猝灭实验表明，SO4中心点(-)在rGO活化PS和PMS以去除BPA过程中占主导地位，然而，HO中心点对催化氧化过程的贡献较小，但程度较低。可重复使用性测试结果表明，催化剂在第二次循环后就严重失活，这凸显了需要进一步研究以提高 rGO 的稳定性。这项研究代表了一种环境友好且高效的 BPA 氧化处理方法，并深入了解了 rGO 激活的 PS 或 PMS 过程。
In the present study, novel metal-free activation of persulfate (PS) and peroxymonosulfate with reduced graphene oxide (rGO) was investigated to degrade Bisphenol A (BPA), one of the most important endocrine disrupting compounds, from different aqueous matrices, namely distilled water (DW) and municipal wastewater treatment plant effluent (TWW). The home-made rGO was characterize and the effect of oxidant (PS and PMS) and catalyst (rGO) concentrations on BPA degradation rates in DW and TWW samples was examined. Complete BPA degradation occurred in DW and TWW with the PS/rGO treatment system after 10 min and 30 min, respectively, whereas 94% (DW) and 83% (TWW) BPA removals were obtained with PMS/rGO for the same treatment period (BPA = 2 mg/L; rGO = 0.02 g/L; PS = 0.25 mM; PMS = 0.5 mM). The radical quenching experiments demonstrated that the SO4 center dot(-) predominated in the activation of PS and PMS with rGO for BPA removal, however, HO center dot contributed to the catalytic oxidation process but to a lower extend. The reusability test results, where the catalyst was deactivated seriously just after second cycle, highlighted the need for further studies to enhance the stability of rGO. This study represented an environmentally benign and efficient oxidative treatment of BPA along with insights into the rGO activated PS or PMS processes.