SCI和EI收录∣中国化工学会会刊

›› 2016, Vol. 24 ›› Issue (10): 1353-1359.DOI: 10.1016/j.cjche.2016.05.028

• Separation Science and Engineering • 上一篇    下一篇

Nickel(II) removal from water using silica-based hybrid adsorbents: Fabrication and adsorption kinetics

Min Xu, Junsheng Liu, Keyan Hu, Congyong Xu, Yaoyao Fang   

  1. Key Laboratory of Membrane Materials and Processes, Department of Chemical and Materials Engineering, Hefei University, 99 Jinxiu Avenue, Hefei 230601, China
  • 收稿日期:2015-12-13 修回日期:2016-04-05 出版日期:2016-10-28 发布日期:2016-11-19
  • 通讯作者: Junsheng Li,E-mail address:jsliu@hfuu.edu.cn.
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21376059), and the Key Discipline of Hefei University (2014xk01).

Nickel(II) removal from water using silica-based hybrid adsorbents: Fabrication and adsorption kinetics

Min Xu, Junsheng Liu, Keyan Hu, Congyong Xu, Yaoyao Fang   

  1. Key Laboratory of Membrane Materials and Processes, Department of Chemical and Materials Engineering, Hefei University, 99 Jinxiu Avenue, Hefei 230601, China
  • Received:2015-12-13 Revised:2016-04-05 Online:2016-10-28 Published:2016-11-19
  • Supported by:
    Supported by the National Natural Science Foundation of China (21376059), and the Key Discipline of Hefei University (2014xk01).

摘要: A series of novel silica-based hybrid adsorbents were prepared by the crosslinking reaction of N-[3-(trimethoxysilyl)propyl] ethylene diamine (TMSPEDA)with epichlorohydrin (ECH) via a sol-gel process. Fourier transforminfrared (FTIR) spectra confirmed that the reaction occurred. TGA curves showed that the thermal stability of these hybrid adsorbents reached as high as 180℃. As a typical example, the adsorption performance of nickel(II) ions onto an adsorbent (the volume ratio of TMSPEDA and ECH was 4:1) was explored. It was found that the adsorption of nickel(II) ions onto this adsorbent followed the Lagergren pseudo-second-order kinetic model. The investigation of the adsorption mechanism demonstrated that nickel(II) adsorption was chiefly controlled by diffusion-chemisorption, suggesting that more diffusion processes were involved in the adsorption of nickel(II) ions onto this type of adsorbents. Desorption experiment indicates that these hybrid adsorbents can be regenerated. These findings reveal that this type of silica-based hybrid adsorbent is promising in the separation and recovery of nickel(II) ions from Ni-containing wastewater or contaminated water.

关键词: Hybrid adsorbent, Nickel(II), Kinetics, Adsorption, Adsorbent

Abstract: A series of novel silica-based hybrid adsorbents were prepared by the crosslinking reaction of N-[3-(trimethoxysilyl)propyl] ethylene diamine (TMSPEDA)with epichlorohydrin (ECH) via a sol-gel process. Fourier transforminfrared (FTIR) spectra confirmed that the reaction occurred. TGA curves showed that the thermal stability of these hybrid adsorbents reached as high as 180℃. As a typical example, the adsorption performance of nickel(II) ions onto an adsorbent (the volume ratio of TMSPEDA and ECH was 4:1) was explored. It was found that the adsorption of nickel(II) ions onto this adsorbent followed the Lagergren pseudo-second-order kinetic model. The investigation of the adsorption mechanism demonstrated that nickel(II) adsorption was chiefly controlled by diffusion-chemisorption, suggesting that more diffusion processes were involved in the adsorption of nickel(II) ions onto this type of adsorbents. Desorption experiment indicates that these hybrid adsorbents can be regenerated. These findings reveal that this type of silica-based hybrid adsorbent is promising in the separation and recovery of nickel(II) ions from Ni-containing wastewater or contaminated water.

Key words: Hybrid adsorbent, Nickel(II), Kinetics, Adsorption, Adsorbent