掺铜介孔碳活化过硫酸氢盐高效降解双酚A

发布时间：2018-04-20 00:41

  本文选题：过硫酸氢盐 + 硫酸根自由基　； 参考：《中国环境科学》2017年11期

【摘要】：采用蒸发诱导自组装的方法制备了掺铜有序介孔碳复合催化剂(Cu-OMC),开展了Cu-OMC活化过硫酸氢钾(PMS)氧化降解双酚A研究.研究结果显示,Cu-OMC可高效活化PMS进而有效降解双酚A,在催化剂投加量0.1g/L、PMS浓度0.5mmol/L的反应条件下,60min内对20mg/L的双酚A去除率可达91%.在pH=3~11范围内,双酚A均可有效降解,阴离子(Cl-、SO_4~(2-)、HCO_3~-和PO_4~(3-))的存在对双酚A降解影响较小.利用自由基猝灭实验和电子顺磁共振(EPR)对反应过程中产生的活性氧自由基(ROS)进行了分析,结果表明除了硫酸根自由基(SO4·-)和羟基自由基(·OH),单线态氧(~1O_2)在双酚A的降解过程中起着重要作用.
[Abstract]:Copper-doped ordered mesoporous carbon composite catalyst (Cu-OMC) was prepared by evaporation-induced self-assembly method. The oxidative degradation of bisphenol A (BPA) by Cu-OMC activated potassium persulfate (KH _ 2SO _ 4) was studied. The results show that Cu-OMC can efficiently activate PMS and effectively degrade bisphenol A. the removal rate of 20mg/L can reach 91g / L 20mg/L within 60 minutes under the condition of catalyst dosage of 0.1 g / L PMS concentration 0.5mmol/L. In the range of pH=3~11, bisphenol A can be degraded effectively, and the existence of anionic Cl-O so 4 and PO4 C 3 C have little effect on the degradation of bisphenol A. The reactive oxygen species (Ros) produced during the reaction were analyzed by free radical quenching and electron paramagnetic resonance (EPR). The results show that, in addition to sulfate radical so _ 4 ~ (-) and hydroxyl radical (O _ H _ (2)), one-line O _ (1) O _ (2) plays an important role in the degradation of bisphenol A (BPA).
【作者单位】： 河北工业大学土木与交通学院;中国科学院生态环境研究中心环境水质学国家重点实验室;
【基金】：国家自然科学基金资助项目(21377148,51222802)
【分类号】：TQ426;X703
，

本文编号：1775497