中山大学学报自然科学版 ›› 2011, Vol. 50 ›› Issue (5): 71-74.

• 研究论文 • 上一篇    下一篇

缺位磷钨杂多阴离子PW11O7-39电催化降解邻苯二甲酸二甲酯

华英杰1,茅 丹1,王崇太1,张 为1,王婷婷1,毛彦超2   

  1. (1. 海南师范大学化学与化工学院,海南 海口 571158;2. 中山大学化学与化学工程学院,广东 广州 510275)
  • 收稿日期:2011-02-07 修回日期:1900-01-01 出版日期:2011-09-25 发布日期:2011-09-25
  • 通讯作者: 王崇太

Electrocatalytic Degradation of Dimethyl Phthalate with Lacunary Heteropolyanion PW11O7-39

HUA Yingjie1,MAO Dan1,WANG Chongtai1,ZHANG Wei1, WANG Tingting1, MAO Yanchao2

  

  1. (1. School of Chemistry and Chemical Engineering, Hainan Normal University,Haikou 571158,China;2. School of Chemistry and Chemical Engineering, Sun Yatsen University,Guangzhou 510275,China)
  • Received:2011-02-07 Revised:1900-01-01 Online:2011-09-25 Published:2011-09-25

摘要:

以Keggin型缺位磷钨杂多阴离子PW11O7-39(PW11)为电催化剂,邻苯二甲酸二甲酯(DMP)为模型污染物,详细研究了PW11对DMP降解的电催化作用。实验结果表明,在pH=2.5,E=-0.6 V和60 mL·min-1O2流速下,0.05 mmol·L-1DMP反应120 min的降解率达96%,总有机碳(TOC)去除约34%。DMP的电催化降解服从准一级反应动力学模型,准一级表观速率常数(k obs)与DMP的初始浓度有关, 当DMP的初始浓度为0.05, 0.2 和0.3 mmol·L-1时,kobs分别为2.9×10-2, 7.5×10-3和4.9×10-3min-1。

关键词: 缺位杂多阴离子, 电催化降解, 邻苯二甲酸二甲酯, 矿化

Abstract: The electrocatalytic degradation of disruptors dimethyl phthalate (DMP), using lacunary heteropolyanion PW11O7-39 as an indirect electrocatalyst, was investigated in this work. The results indicated that 96% of DMP degradation was obtained in less than 120 min in Na2SO4-NaHSO4 solution (pH 2.5) containing 0.05 mmol·L-1 DMP at the potential of -0.6 V and the O.2 flow rate of 60 mL min-1. A total organic carbon (TOC) removal reached 34% at 120 min. The DMP degradation reaction follows the pseudofirst order kinetic regime and the observed rate constants (k obs) related to the initial DMP concentration were determined to be 2.9×10-2, 7.5×10-3and 4.9×10-3 min-1 at the initial DMP concentration of 0.05, 0.2 and 0.3 mmol·L-1, respectively.

Key words: lacunary heteropolyanion, electrocatalytic degradation, dimethyl phthalate, mineralization

中图分类号: