Efficent removal of nickel(II) salts from aqueous solution using carboxymethylchitosan-coated silica particles as adsorbent

Moumin Aden; Rattiya Na Ubol; Michael Knorr; Jérôme Husson; Myriam Euvrard

doi:10.1016/j.carbpol.2017.05.090

Efficent removal of nickel(II) salts from aqueous solution using carboxymethylchitosan-coated silica particles as adsorbent

Carbohydr Polym. 2017 Oct 1:173:372-382. doi: 10.1016/j.carbpol.2017.05.090. Epub 2017 Jun 3.

Authors

Moumin Aden¹, Rattiya Na Ubol², Michael Knorr³, Jérôme Husson⁴, Myriam Euvrard⁵

Affiliations

¹ Institut UTINAM, UMR CNRS 6213, Matériaux et Surfaces Structurés, Université Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France; Faculté des Sciences, Université de Djibouti, Avenue Djanaleh, 1904, Djibouti.
² Institut UTINAM, UMR CNRS 6213, Matériaux et Surfaces Structurés, Université Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France; Division of Chemistry, School of Science, University of Phayao, 56000, Thailand.
³ Institut UTINAM, UMR CNRS 6213, Matériaux et Surfaces Structurés, Université Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France. Electronic address: michael.knorr@univ-fcomte.fr.
⁴ Institut UTINAM, UMR CNRS 6213, Matériaux et Surfaces Structurés, Université Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France.
⁵ Institut UTINAM, UMR CNRS 6213, Matériaux et Surfaces Structurés, Université Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France. Electronic address: meuvrard@univ-fcomte.fr.

PMID: 28732879
DOI: 10.1016/j.carbpol.2017.05.090

Abstract

Three types of organo-mineral composites have been probed as adsorbents for the removal of Ni(II) ions from aqueous solution. Native Aerosil 200 silica particles have been encapsulated with carboxymethylchitosan (CM-CS) providing SiO₂+CM-CS, surface-silanized silica particles SiO₂NH₂+CM-CS were obtained by treatment with APTES and subsequent encapsulation by CM-CS. Alternatively, surface-carboxylated Aerosil 200 was coated by CM-CS affording SiO₂CO₂H+CM-CS. The materials have been characterized by various techniques. The effects of counter ions (Cl^-, Br^-, CH₃COO^-, NO₃^- and SO₄^2-), pH and initial Ni(II) concentration on the adsorption capacities have been systematically investigated. The maximum adsorption capacity q_m of CM-CS-coated silica was determined using the Langmuir adsorption isotherm. For SiO₂CO₂H+CM-CS, SiO₂+CM-CS and SiO₂NH₂+CM-CS, they decrease at pH 7 in the order 256mg/g>140mg/g>105mg/g. The adsorption kinetic fits well with a pseudo-second order model. These carbohydrate-derived biosorbents are excellent adsorbents with capacities superior to most other adsorbents reported in the literature.

Keywords: Adsorption isotherms; Carboxymethylchitosan; Counter ions; Kinetic studies; Nickel; Silica.