Synchronous Adsorption of Cadmium and Lead ions from Aqueous Media by Rice Husk Ash and Sodium Dodecyl Sulfate Combination
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Date
2014-02-28
Authors
Achadu, O.J
Ayejuyo, O.O
Ako, F.E
Dalla, C.L
Olaoye, O.O
Journal Title
Journal ISSN
Volume Title
Publisher
International Journal of Modern Analytical and Separation Sciences
Abstract
In this study, the synchronous removal of Pb2+ and Cd2+ ions from aqueous solutions by colloidal particles made from rice husk ash (RHA) in aqueous sodium dodecyl sulfate (SDS) solution was investigated. The RHA derived from rice husk waste generated from the rice mills in Wukari, north-eastern Nigeria was combined with sodium dodecyl sulfate (SDS) for the metal ions adsorption. The adsorption studies under different experimental conditions were optimized and the removal of Pb2+ and Cd2+ ions was highly pH dependent. The results indicated that pH 8.0 was the optimum for the removal of the metal ions. Adsorption equilibration time was achieved in 2 hours with maximum removal efficiency of the metals ions attained at 71.8 and 88.9 % for Pb2+ and Cd2+ respectively. The equilibrium data were satisfactorily fitted to Langmuir and Freudlich isotherms. The Langmuir isotherm models gave a better representation of the data than the Freudlich isotherms. The RHA-SDS combination showed higher adsorption capacity for Cd2+ ion compared to Pb2+ ion under the experimental conditions in the single and binary solutions. The study showed that RHA-SDS synergy can be effectively used for the removal of Pb2+ and Cd2+ ions from wastewater with higher efficiency compared to the use of RHA alone.
Description
Keywords
Lead , Cadmium , Adsorption , Rice husk Ash , SDS micelles
Citation
Achadu, O. J., Ayejuyo, O. O., Ako, F. E., Dalla, C. L., & Olaoye, O. O. (2014). Synchronous adsorption of cadmium and lead ions from aqueous media by rice husk ash and sodium dodecyl sulfate combination. Int. J. Mod. Anal. Sep. Sci, 3, 20-39.