International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2570

Full Length Research Paper

Equilibrium studies for the removal of basic dye by sunflower seed husk (Helianthus annuus)

Siew-Teng Ong1*, Pei-Sin Keng2, Siew-Ling Lee3, Ming-How Leong4 and Yung-Tse Hung5
1Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia. 2Department of Pharmaceutical Chemistry, International Medical University, No.126, Jalan 19/155B, Bukit Jalil, 57000 Kuala Lumpur, Malaysia. 3Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 Skudai, Johor Malaysia. 4Department of Science, Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Genting Kelang, Setapak 53300 Kuala Lumpur, Malaysia. 5Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio USA.
Email: [email protected], [email protected]

  •  Accepted: 07 June 2010
  •  Published: 04 August 2010

Abstract

The sorption characteristics of sunflower (Helianthus annuus) seed husk (SSH) to remove Methylene Blue (MB) from aqueous solution under batch conditions have been investigated. Sorption of MB was found to be pH, concentration and agitation dependent. The kinetics of sorption was rapid with 80% sorption taking place within the first 60 min regardless of its initial concentration. The fast attainment of equilibrium implying the biosorbent could be suitable for continuous flow system. Using the pseudo-second order kinetics model, the predictive model for MB sorbed at time t (qt) with the  initial concentration of (Co) is given by qt = Cot/[0.0607Co + 2.0762 + (0.0012Co + 5.1949)t]. Results indicated that the predicted uptakes of MB agreed closely with experimental values obtained. The experimental data fitted well to Langmuir isotherm model with the correlation coefficient of 0.9860 and maximum monolayer sorption capacity of 45.25 mg/g.

 

Key words:  Sunflower seed husk, sorption, basic dye, methylene blue, kinetics, modelling.