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›› 2008, Vol. 8 ›› Issue (4): 751-755.

• 过程与工艺 • 上一篇    下一篇

Fe-ZSM-5分子筛催化剂催化降解高浓度含酚废水

吕树祥 魏佳 胡炀 郭丽梅 邓宇 武文洁   

  1. 天津科技大学材料科学与化学工程学院 天津科技大学材料科学与化学工程学院 天津科技大学材料科学与化学工程学院 天津科技大学材料科学与化学工程学院 天津科技大学材料科学与化学工程学院 天津科技大学材料科学与化学工程学院
  • 收稿日期:2008-03-17 修回日期:2008-05-04 出版日期:2008-08-20 发布日期:2008-08-20
  • 通讯作者: 吕树祥

Catalytic Oxidation of Phenol in Waste Water with High Concentration by Fe-ZSM-5 Zeolite Catalyst

Lu Shu-xiang WEI Jia HU Yang GUO Li-mei DENG Yu WU Wen-lie   

  1. School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology
  • Received:2008-03-17 Revised:2008-05-04 Online:2008-08-20 Published:2008-08-20
  • Contact: Lu Shu-xiang

摘要: 以不同Si/Al比的H-ZSM-5分子筛制备了Fe-ZSM-5分子筛催化剂,研究了废水pH值、反应温度、催化剂用量、H2O2用量、反应时间、搅拌转速和Si/Al比对Fe-ZSM-5催化H2O2氧化降解高浓度含酚废水的影响,确定了较佳的工艺条件,苯酚的降解率可达99%以上,CODcr去除率达88%. Si/Al比高的催化剂活性较高,催化剂酸强度对反应影响显著,酸强度越高越有利于苯酚降解. Fe-ZSM-5分子筛催化剂经过多次重复使用,催化活性基本没有降低,使用寿命长. Fe-ZSM-5分子筛催化剂与Fenton试剂比较发现,Fe-ZSM-5非均相体系废水中的Fe离子浓度低于1′10-6 g/L,无二次污染,克服了Fenton试剂体系中存在大量Fe离子的缺陷.

关键词: Fe-ZSM-5分子筛, 非均相催化剂, 催化氧化, 苯酚, 过氧化氢

Abstract: The Fe-ZSM-5 zeolite catalyst was prepared by Fe(NO3)3 and H-ZSM-5 zeolite with various Si/Al ratios. The effects of aqueous solution pH, reaction temperature, amounts of catalyst and H2O2 used, reaction time, stirring speed and Si/Al ratio on the degradation rate of phenol in waste water with high concentration were investigated, respectively. The results show that the degradation rate of phenol is 99% and removal rate of COD 88% under the optimal conditions. The performance of catalyst is affected obviously by the Si/Al ratio of the catalyst. The catalytic activity of Fe-ZSM-5 zeolite is not decreased after being used repeatedly. Compared with Fenton system, the concentration of iron ion in the treated solution is below 1′10-6 g/L by Fe-ZSM-5 catalyst, and the possibility of induced pollution caused by the metal ions in the solution is avoided.

Key words: Fe-ZSM-5 zeolite, heterogeneous catalyst, catalytic oxidation, phenol, hydrogen peroxide

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