地学前缘 ›› 2019, Vol. 26 ›› Issue (3): 255-262.DOI: 10.13745/j.esf.sf.2019.5.30

• 非主题来稿选登 • 上一篇    下一篇

La0.5 Sr0.5 Co0.8 Mn0.2 O3-δ 钙钛矿对过一硫酸盐降解水中四溴双酚A影响实验研究

毛韦达，胡翔   

  1. 北京化工大学 化学工程学院, 北京 100029
  • 收稿日期:2019-03-01 修回日期:2019-04-08 出版日期:2019-05-25 发布日期:2019-05-25
  • 通讯作者: 胡翔(1966—)，男，博士，教授，博士生导师，长期从事环境材料与环境工程研究。
  • 作者简介:毛韦达(1993—)，男，硕士研究生，环境工程专业，研究方向为环境催化材料。
  • 基金资助:
    国家自然科学基金项目(51178022，51278022)

Experimental studies of the effect of perovskite La0.5 Sr0.5 Co0.8 Mn0.2 O3-δ on tetrabromobisphenol A degradation in water by peroxy-monosulfate

MAO Weida,HU Xiang   

  1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2019-03-01 Revised:2019-04-08 Online:2019-05-25 Published:2019-05-25
  • Supported by:
     

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摘要： 研究了La0.5 Sr0.5 Co0.8 Mn0.2 O3-δ钙钛矿活化过氧单硫酸盐对四溴双酚A(TBBPA)的降解作用，重点探讨不同的煅烧温度制备镧锶钴锰钙钛矿(LSCM82)的催化性能对过一硫酸盐降解TBBPA的影响，以及溶液的不同初始pH条件对优选材料体系降解效率的影响。结果发现，变价离子的氧化还原对Co3+/Co2+和(Mn4++Mn3+)/Mn2+是催化剂活性的主要贡献者。煅烧温度为950 ℃且具有适量间隙氧及比表面积的LSCM82-950催化反应速率较高。在中性pH环境条件下应用LSCM82-950活化过一硫酸盐降解水中TBBPA污染物，既可以使催化剂钴浸出很少，又能达到最大程度的TBBPA降解效果。

 

关键词: 钙钛矿, 过一硫酸盐, 四溴双酚 A, 降解, 高级氧化技术

Abstract: We carried out experimental studies of tetrabromobisphenol A (TBBPA) degradation by perovskite La0.5Sr0.5Co0.8Mn0.2O3-δ(LSCM82) and peroxy-monosulfate. We investigated in detail the effect of catalytic activity of perovskite prepared at different calcination temperatures on TBBPA degradation, and the effect of initial pH on the degradation efficiency of preferred catalytic system. The results show that the redox pairs of variable-valence metal ions Co3+/Co2+ and (Mn4++Mn3+)/Mn2+ were the major contributors to catalyst activation. At 950 ℃ calcination temperature, the catalytic reaction rate was higher for the catalyst aggregate LSCM82-950 that has proper oxygen vacancies and specific surface area. We found that degradation of TBBPA in water by LSCM82-950 activated monosulfate at neutral pH not only reduced cobalt leaching from catalyst, but also achieved maximum degradation.

Key words: perovskite, peroxy-monosulfate, TBBPA, degradation, advanced oxidation processes

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