Removal of Metanil Yellow from Aqueous Solution by Batch Sorption on Caladium bicolour Corm and Egg Shell: Effect of Nature of Sorbents

Beniah O. Isiuku1,*, Ozioma U. Akakuru2, Festus Emengaha3 and Benjamin I. Nwabueze1

1Department of Chemistry, Imo State University, PMB 2000, Owerri, Nigeria

2Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria

3Department of Clinical Biochemistry, Imo State University, PMB 2000, Owerri, Nigeria

*To whom correspondence to be addressed: Tel: + 234 80 35731300 E-mail: [email protected]

Abstract

Caladium bicolour is a stubborn weed in farmlands while eggshell biomass is an agricultural waste of no economic importance. Batch sorption of metanil yellow on the biomasses was carried out with a view to determine the effect of nature of sorbents. Effects of initial dye concentration, initial pH and sorbent dosage were investigated. Experimental results were analyzed with three isotherms and three kinetic models. The Boyd model was used to determine the rate-determining step. The Caladium bicolour corm contains functional groups while eggshell contains pores. The highest sorption capacities were 3.995 and 1.385 mg/g for Caladium bicolour and eggshell, respectively; the optimum pH was 5. Sorption decreased with increase in initial concentration for Caladium bicolour, while for eggshell sorption increased with increase in initial concentration. The isotherm and kinetic models applied were good fits. The sorption was controlled by liquid film diffusion. Sorption on Caladium bicolour was more than twice that of eggshell. However, the sorptions on both sorbents were low.

Keywords

Batch sorption, Eggshell, Caladium bicolour, Metanil yellow.

  
 
  • Asian J. Mat. Chem. /
  •  2018 /
  •  3(3) /
  •  pp 51-56
  • DOI:10.14233/ajmc.2018.AJMC-P61