Journal of Industrial and Engineering Chemistry

  • Volume 49
  • /
  • Pages.133-144
  • /
  • 2017
  • /
  • 1226-086X(pISSN)
  • /
  • 1876-794X(eISSN)
The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Polyethylenimine-modified mesoporous silica adsorbent for simultaneous removal of Cd(II) and Ni(II) from aqueous solution

  • Thakur, Amit K. (Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST), Myongji University) ;
  • Nisola, Grace M. (Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST), Myongji University) ;
  • Limjuco, Lawrence A. (Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST), Myongji University) ;
  • Parohinog, Khino J. (Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST), Myongji University) ;
  • Torrejos, Rey Eliseo C. (Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST), Myongji University) ;
  • Shahi, Vinod K. (Electro-Membrane Processes Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR)) ;
  • Chung, Wook-Jin (Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST), Myongji University)
  • Received : 2016.08.12
  • Accepted : 2017.01.15
  • Published : 2017.05.25
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Abstract

Nano-spherical amine-rich polyethylenimine (PEI) grafted on mesoporous silica (MCM-41) (PEI/MCM-41) was developed for Cd(II) and Ni(II) removal fromwater. Characterization of PEI/MCM-41 using various techniques confirms its successful fabrication. Adsorption results reveal that pH and adsorbent dosage must be controlled for maximum removal. The adsorption rate was pseudo-second-order, and fitted well with Langmuir and Freundlich isotherms at equilibrium. The adsorption was thermodynamically spontaneous, endothermic and favourable. Adsorption capacities of $156.0mg\;g^{-1}$ Cd(II) and $139.7mg\;g^{-1}$ Ni(II) were on par with other high performing reported adsorbents. The PEI/MCM-41 was successfully reused demonstrating its potential for heavy metal decontamination application.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF), Ministry of Education

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