Snail Based Carbonated-Hydroxyapatite Material as Adsorbents for Water Iron (II)

Bernard Owusu Asimeng; Edward Kwame Amenyaglo; David Dodoo-Arhin; Johnson Kwame Efavi; Bright Kwakye-Awuah; Elvis Kwason Tiburu; E Johan Foster; Jan Czernuska

doi:10.3390/ma15093253

Snail Based Carbonated-Hydroxyapatite Material as Adsorbents for Water Iron (II)

Materials (Basel). 2022 Apr 30;15(9):3253. doi: 10.3390/ma15093253.

Authors

Bernard Owusu Asimeng¹, Edward Kwame Amenyaglo¹, David Dodoo-Arhin², Johnson Kwame Efavi², Bright Kwakye-Awuah³, Elvis Kwason Tiburu¹, E Johan Foster⁴, Jan Czernuska⁵

Affiliations

¹ Department of Biomedical Engineering, University of Ghana, Legon, Accra LG 77, Ghana.
² Department of Materials Science and Engineering, University of Ghana, Legon, Accra LG 77, Ghana.
³ Department of Physics, Kwame Nkrumah University of Science and Technology, UPO, PMB, Kumasi AK 448, Ghana.
⁴ Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.
⁵ Department of Materials, University of Oxford, Oxford OX1 3PH, UK.

Abstract

Carbonated hydroxyapatite (CHAp) adsorbent material was prepared from Achatina achatina snail shells and phosphate-containing solution using a wet chemical deposition method. The CHAp adsorbent material was investigated to adsorb aqua Fe(II) complex; [Fe(H₂O)₆]²⁺ from simulated iron contaminated water for potential iron remediation application. The CHAp was characterized before and after adsorption using infrared (IR) and Raman spectroscopy. The IR and the Raman data revealed that the carbonate functional groups of the CHAp adsorbent material through asymmetric orientation in water bonded strongly to the aqua Fe(II) complex adsorbate. The adsorption behaviour of the adsorbate onto the CHAp adsorbent correlated well to pseudo-second-order kinetics model, non-linear Langmuir and Freundlich model at room temperature of a concentration (20-100 mg L^-1) and contact time of 180 min. The Langmuir model estimated the maximum adsorption capacity to be 45.87 mg g^-1 whereas Freundlich model indicated an S-type isotherm curvature which supported the spectroscopy revelation.

Keywords: adsorption kinetics; carbonated-hydroxyapatite; iron(II) adsorption; water remediation.

Grants and funding

Research reported in this publication was supported by the Fogarty International Center and National Institute of Biomedical Imaging and Bioengineering (NIBIB) of the National Institutes of Health under Award Number D43 TW010543. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.