工业水处理 ›› 2021, Vol. 41 ›› Issue (9): 135-139. doi: 10.19965/j.cnki.iwt.2020-1237

• 试验研究 • 上一篇    下一篇

沸石的改性工艺及其吸附除磷特性研究

徐丽(),徐子祥   

  1. 沈阳建筑大学, 辽宁沈阳 110168
  • 收稿日期:2021-07-19 出版日期:2021-09-20 发布日期:2021-09-28
  • 作者简介:徐丽(1974-), 博士, 副教授。电话: 13998385373, E-mail: xuli7404@163.com
  • 基金资助:
    国家水专项子任务(2018ZX07601001-3)

Modification process of zeolite and its phosphorus adsorption characteristics

Li Xu(),Zixiang Xu   

  1. Shenyang Jianzhu University, Shenyang 110168, China
  • Received:2021-07-19 Online:2021-09-20 Published:2021-09-28

摘要:

研究了组合改性沸石的最佳制备方法,以及不同改性方式和pH对改性沸石除磷效果的影响。通过吸附动力学与吸附等温线探究其吸附机理并使用扫描电镜对改性前后的沸石进行表征。结果表明,最佳的改性方案为2.0 mol/L NaOH溶液和2.0 mol/L聚合氯化铝(PAC)溶液组合改性。当废水pH=7时该改性沸石除磷效果最佳,此时除磷率为98.74%,其吸附符合准二级动力学方程和Langmuir模型。扫描电镜表征结果表明,碱改性和铝改性均可改变沸石的孔隙结构,增加吸附点位。

关键词: 沸石, 吸附除磷, 改性, 组合改性

Abstract:

The optimal preparation method of combined modified zeolite was studied, and the effect of different modification methods and pH on the phosphorus removal effect were investigated. Adsorption mechanism through adsorption kinetics and adsorption isotherms was explored and the structure of zeolite before and after modification were investigated with scanning electron microscopy. The results showed that the optimal modification plan was the combined modification of 2.0 mol/L sodium hydroxide solution and 2.0 mol/L polyaluminum chloride solution. When the wastewater pH=7, the phosphorus removal effect was the best, and the phosphorus removal rate was 98.74%. Modified zeolite adsorption met quasi-second-order kinetics and Langmuir model. Scanning electron microscopy showed that both alkali modification and aluminum modification could change the pore structure of zeolite and increase adsorption sites.

Key words: zeolite, phosphorus removal by adsorption, modification, combined modification

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