Arsenic adsorption from contaminated water on Fe(III)-coordinated amino-functionalized poly(glycidylmethacrylate)-grafted TiO2-densified cellulose

Authors


Correspondence to: Thayyath Sreenivasan Anirudhan, Department of Chemistry, University of Kerala, Kariavattom, Trivandrum-695 581, India. E-mail: tsani@rediffmail.com

Abstract

BACKGROUND: The main aim of this study is to determine the sorptive potential of a novel anion exchanger, Fe(III)-coordinated amino-functionalized poly(glycidylmethacrylate)-grafted TiO2-densified cellulose (AM-Fe-PGDC) for arsenic(V) removal from aqueous solutions by batch technique.

RESULTS: The adsorbent was characterized using infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, thermogravimetry and potentiometric titrations. The effective pH for removal was 6.0. The adsorption rate was influenced by initial metal ion concentration and contact time. The equilibrium was achieved within 1.5 h and follows a pseudo-second-order kinetic model. The adsorption capacity for As(V) calculated using the Langmuir isotherm equation was 105.47 mg g−1. The AM-Fe-PGDC developed was used to remove As(V) from simulated groundwater. Regeneration experiments were attempted for four cycles using 0.1 mol L−1 NaCl solution.

CONCLUSION: It was found that AM-Fe-PGDC is very efficient for the removal of As(V) from aqueous solutions. © 2012 Society of Chemical Industry

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