ZSM-5沸石的合成、再生及其对废水中有机物的吸附研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (12): 4552-4558.

ZSM-5沸石的合成、再生及其对废水中有机物的吸附研究

杨露婷, 刘勇

天津大学环境与科学工程学院,天津 300350

收稿日期:2023-06-26 修订日期:2023-07-31 出版日期:2023-12-15 发布日期:2023-12-12
通信作者: 刘勇,博士,副教授。E-mail:lytju@tju.edu.cn
作者简介:杨露婷(1999—),男,硕士研究生。主要从事废水资源化的研究。E-mail:15630102106@163.com

Synthesis and Regeneration of ZSM-5 Zeolite and Its Adsorption on Organic Matter in Wastewater

YANG Luting, LIU Yong

School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China

Received:2023-06-26 Revised:2023-07-31 Online:2023-12-15 Published:2023-12-12

摘要/Abstract

摘要： 针对高盐废水中的有机物去除问题,本文采用水热法合成了不同硅铝摩尔比(Si/Al)的ZSM-5沸石,并进行XRD、SEM、XRF和BET分析,考察了不同Si/Al沸石对高盐废水有机物的去除效果,研究了沸石的煅烧再生温度,评价了沸石在高盐废水有机物吸附过程中的重复利用性能。结果表明,随着原料Si/Al的增加,ZSM-5沸石粒径逐步减小,比表面积逐步增加,沸石对废水中有机物的吸附效率逐步增大。当原料Si/Al为500时,合成的ZSM-5沸石对废水中有机物的吸附效果较佳,在15次再生重复利用过程中,废水总有机碳(TOC)的去除率均大于92.5%。ZSM-5沸石的最佳煅烧再生温度为650 ℃。

关键词: ZSM-5沸石, 高盐废水, 总有机碳, 吸附, 再生

Abstract: For the removal of organic matter in high salinity wastewater, ZSM-5 zeolites with different silicon aluminum molar ratios(Si/Al) were synthesized by hydrothermal method, and were analyzed using XRD, SEM, XRF and BET. The removal effects of zeolites with different silicon aluminum ratios on organic matters in high salinity wastewater were investigated. The temperature of the regeneration of zeolites through calcination were studied also, and the reuse performance of zeolites in the adsorption process of organic matter in high salinity wastewater was evaluated. The results show that with the increase of silicon aluminum ratio of raw material, the particle size of ZSM-5 zeolite gradually decreases, the specific surface area gradually increases, and the adsorption efficiency of zeolite for organic matter in wastewater gradually increases. When silicon aluminum ratio of raw material Si/Al is 500, the synthesized ZSM-5 zeolite has a better adsorption effect on organic matter in wastewater. During 15 times of regeneration and reuse, the removal rate of total organic carbon (TOC) in wastewater is greater than 92.5%. The optimal calcination regeneration temperature of ZSM-5 zeolite is 650 ℃.

Key words: ZSM-5 zeolite, high salinity wastewater, total organic carbon, adsorption, regeneration

中图分类号:

X703.1

杨露婷, 刘勇. ZSM-5沸石的合成、再生及其对废水中有机物的吸附研究[J]. 硅酸盐通报, 2023, 42(12): 4552-4558.

YANG Luting, LIU Yong. Synthesis and Regeneration of ZSM-5 Zeolite and Its Adsorption on Organic Matter in Wastewater[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4552-4558.

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