Two-step Hydrothermal Synthesis of Stellerite Zeolite to High Quality Zeolite X and Its Efficient Adsorption Performance Study for Cd2+ and Ni2+
PEI Yinchang1, MO Shengpeng1, XIE Qinglin1,2,*, CHEN Nanchun3,4,*
1 College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, Guangxi, China 2 Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, Guangxi, China 3 College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China 4 Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources in Guangxi, Guilin University of Technology, Guilin 541004, Guangxi, China
Abstract: In this study, high quality zeolite X was conversed from stellerite zeolite by a two-step hydrothermal method. The influence of n(H2O/SiO2), n(Na2O/SiO2), n(Al2O3/SiO2), aging time, crystallization temperature and crystallization time of the stellerite zeolite conversion into zeolite X were investigated, and the adsorption performance for Cd2+ and Ni2+ of zeolite X was investigated. The results showed that the optimal conversion conditions of zeolite X were as follows:n(H2O/SiO2)=55, n(Na2O/SiO2)=1.1, n(Al2O3/SiO2)=0.33, aging time 48 h, crystallization temperature 82 ℃ and crystallization time 4 h. After dissolution, the stellerite zeolite depolymerized into the oligomeric Si species and remained in the system to participate in the growth of zeolite X, prompting the relative crystallinity and n(Si/Al) value of the synthesized zeolite X were 100% and 1.14, respectively. It was beneficial to shorten the crystallization time and reduce the crystallization temperature. And the adsorption capacity of Cd2+ and Ni2+ for zeolite X were 173.553 mg/g and 75.897 mg/g, respectively. Therefore, this study would provide theoretical basis and technical support for the rapid conversion of natural minerals into high quality zeolite X design and preparation.
裴胤昌, 莫胜鹏, 解庆林, 陈南春. 红辉沸石两步水热制备高品质X型分子筛及其高效吸附Cd2+、Ni2+性能研究[J]. 材料导报, 2023, 37(24): 22050310-9.
PEI Yinchang, MO Shengpeng, XIE Qinglin, CHEN Nanchun. Two-step Hydrothermal Synthesis of Stellerite Zeolite to High Quality Zeolite X and Its Efficient Adsorption Performance Study for Cd2+ and Ni2+. Materials Reports, 2023, 37(24): 22050310-9.
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2023, Vol. 37 
