A kinetic study on cadmium adsorption from aqueous solutions by pre-conditioned phosphogypsum

Balkaya N., Cesur H.

DESALINATION AND WATER TREATMENT, vol.57, no.6, pp.2515-2521, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 57 Issue: 6
  • Publication Date: 2016
  • Doi Number: 10.1080/19443994.2015.1038854
  • Journal Name: DESALINATION AND WATER TREATMENT
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2515-2521
  • Keywords: Adsorption, Cadmium, Kinetics, Phosphogypsum, Reuse, CEIBA-PENTANDRA HULLS, ACTIVATED CARBON, METHYLENE-BLUE, LEAD REMOVAL, FLY-ASH, EQUILIBRIUM, IONS, ZINC, PARAMETERS, MECHANISM
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

In the present study, the effect of contact time, adsorbent dosage, and initial cadmium concentration on the adsorption of Cd(II) ions from aqueous solutions by pre-conditioned phosphogypsum was investigated. The kinetics of adsorption was studied and, pseudo-first-order, pseudo-second-order, and Elovich models were used to fit the experimental data, which was obtained from batch experiments. The kinetic adsorption data fitted well into the second-order kinetic model. Adsorption mechanism was explained with the intraparticle diffusion and Boyd kinetic models.