Kinetics and Thermodynamics Studies of Cobalt (II) Adsorption onto Alumina

  • Uzma Zafar Mineral Processing Research Centre, PCSIR Laboratories Complex, Ferozepur Road, Lahore
  • Muhammad Arif Bhatti Mineral Processing Research Centre, PCSIR Laboratories Complex, Ferozepur Road, Lahore
  • Adnan Akram Mineral Processing Research Centre, PCSIR Laboratories Complex, Ferozepur Road, Lahore

Abstract




Adsorption for alumina-cobalt (II) ions solution system was investigated as a function of adsorbent dose, contact time, temperature, pH of solution and initial concentration of adsorbate. The optimum conditions for removal of cobalt (II) ions were found as pH 7.5-8.5, adsorbent dose of solution 20 gl-1, equilibrium time 90 minutes and initial concentration range 5-50 mgl-1. Pseudo-second-order kinetics was observed for adsorption of cobalt while cobalt removal process does not seem to control the intra-particle diffusion. Langmuir, Freundlich and Dubnin- Radushkevich isotherm models were applied to analyze the equilibrium isotherms for adsorption of cobalt (II) ions onto alumina. The experimental results indicated that equilibrium data follows the Langmuir model within used concentration range.




Published
Jun 27, 2018
How to Cite
ZAFAR, Uzma; BHATTI, Muhammad Arif; AKRAM, Adnan. Kinetics and Thermodynamics Studies of Cobalt (II) Adsorption onto Alumina. Pakistan Journal of Analytical & Environmental Chemistry, [S.l.], v. 19, n. 1, p. 53-63, june 2018. ISSN 2221-5255. Available at: <http://pjaec.pk/index.php/pjaec/article/view/393>. Date accessed: 21 sep. 2018. doi: http://dx.doi.org/10.21743/pjaec/2018.06.05.