Adsorption of Ni2+, Cd2+, PO43- and NO3- from aqueous solutions by nanostructured microfibrillated cellulose modified with carbonated hydroxyapatite

Sanna Hokkanen, Eveliina Repo, Lena Johansson Westholm, Song Lou, Tuomo Sainio, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

121 Citations (Scopus)

Abstract

The adsorption of Ni2+, Cd2+, PO43- and NO3- by carbonated hydroxyapatite (CHA) modified microfibrillated cellulose (MFC) was studied in the aqueous solution. The modified adsorbent was characterized using elemental analysis, FTIR, SEM and EDAX analysis. The adsorption studies were conducted in batch mode. The effects of pH, contact time, the concentration of metals and the regeneration efficiency were studied. The removal of Ni2+, Cd2+, PO43- and NO3- was not pH dependent. The maximum removal capacities of the CHA/MFC adsorbent for Ni2+, Cd2+, PO43- and NO3- were 2.021, 1.224, 0.843 and 0.209mmol/g, respectively. The Langmuir and Sips models were representative to simulate adsorption isotherms. The results of adsorption kinetic indicate that adsorption was very fast for all studied compounds.

Original languageEnglish
Pages (from-to)64-74
Number of pages11
JournalChemical Engineering Journal
Volume252
DOIs
Publication statusPublished - 15 Sept 2014
Externally publishedYes

Keywords

  • Adsorption
  • Carbonated hydroxyapatite (CHA)
  • Isotherms
  • Nanocellulose
  • Water treatment

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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