SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 51 ›› Issue (11): 61-74.DOI: 10.1016/j.cjche.2022.06.008

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Stellerite-seeded facile synthesis of zeolite X with excellent aqueous Cd2+ and Ni2+ adsorption performance

Yinchang Pei1, Shengpeng Mo1, Qinglin Xie1,2, Nanchun Chen3, Zhongxin Yang3, Lili Huang1, Lili Ma1   

  1. 1. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;
    2. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China;
    3. College of Material Science and Engineering, Guilin University of Technology, Guilin 541006, China
  • Received:2022-03-04 Revised:2022-06-06 Online:2023-01-18 Published:2022-11-18
  • Contact: Qinglin Xie,E-mail:xqinglin@hotmail.com;Nanchun Chen,E-mail:cnc@glut.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51564008, 41662005) and Natural Science Foundation of Guangxi Province (2019GXNSFBA245083).

Stellerite-seeded facile synthesis of zeolite X with excellent aqueous Cd2+ and Ni2+ adsorption performance

Yinchang Pei1, Shengpeng Mo1, Qinglin Xie1,2, Nanchun Chen3, Zhongxin Yang3, Lili Huang1, Lili Ma1   

  1. 1. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;
    2. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China;
    3. College of Material Science and Engineering, Guilin University of Technology, Guilin 541006, China
  • 通讯作者: Qinglin Xie,E-mail:xqinglin@hotmail.com;Nanchun Chen,E-mail:cnc@glut.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (51564008, 41662005) and Natural Science Foundation of Guangxi Province (2019GXNSFBA245083).

Abstract: Zeolite X was synthesized by a two-step hydrothermal method using natural stellerite zeolite as the silicon seed, and its adsorption performance for Cd2+ and Ni2+ ions was experimentally and comprehensively investigated. The effects of pH, zeolite X dosage, contact time, and temperature on adsorption performance for Cd2+ and Ni2+ ions over were studied. The adsorption process was endothermic and spontaneous, and followed the pseudo-second-order kinetic and the Langmuir isotherm models. The maximum adsorption capacitiesfor Cd2+ and Ni2+ ions at 298 K were 173.553 and 75.897 mg·g-1, respectively. Ion exchange and precipitation were the principal mechanisms for the removal of Cd2+ ions from aqueous solutions by zeolite X, followed by electrostatic adsorption. Ion exchange was the principal mechanisms for the removal of Ni2+ ions from aqueous solutions by zeolite X, followed by electrostatic adsorption and precipitation. The zeolite X converted from stellerite zeolite has a low n(Si/Al), abundant hydroxyl groups, and high crystallinity and purity, imparting a good adsorption performance for Cd2+ and Ni2+ ions. This study suggests that zeolite X converted from stellerite zeolite could be a useful environmentally-friendly and effective tool for the removal of Cd2+ and Ni2+ ions from aqueous solutions.

Key words: Zeolite X, Stellerite zeolite, Adsorption mechanism, Cd2+ adsorption, Ni2+ adsorption, Ion exchange

摘要: Zeolite X was synthesized by a two-step hydrothermal method using natural stellerite zeolite as the silicon seed, and its adsorption performance for Cd2+ and Ni2+ ions was experimentally and comprehensively investigated. The effects of pH, zeolite X dosage, contact time, and temperature on adsorption performance for Cd2+ and Ni2+ ions over were studied. The adsorption process was endothermic and spontaneous, and followed the pseudo-second-order kinetic and the Langmuir isotherm models. The maximum adsorption capacitiesfor Cd2+ and Ni2+ ions at 298 K were 173.553 and 75.897 mg·g-1, respectively. Ion exchange and precipitation were the principal mechanisms for the removal of Cd2+ ions from aqueous solutions by zeolite X, followed by electrostatic adsorption. Ion exchange was the principal mechanisms for the removal of Ni2+ ions from aqueous solutions by zeolite X, followed by electrostatic adsorption and precipitation. The zeolite X converted from stellerite zeolite has a low n(Si/Al), abundant hydroxyl groups, and high crystallinity and purity, imparting a good adsorption performance for Cd2+ and Ni2+ ions. This study suggests that zeolite X converted from stellerite zeolite could be a useful environmentally-friendly and effective tool for the removal of Cd2+ and Ni2+ ions from aqueous solutions.

关键词: Zeolite X, Stellerite zeolite, Adsorption mechanism, Cd2+ adsorption, Ni2+ adsorption, Ion exchange