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

Abstract

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

CLC Number:

X703.1

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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