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Iranian Journal of Environmental Health, Science and Engineering
Iranian Association of Environmental Health (IAEH)
ISSN: 1735-1979
Vol. 4, No. 3, 2007, pp. 139-146
Bioline Code: se07021
Full paper language: English
Document type: Research Article
Document available free of charge

Iranian Journal of Environmental Health, Science and Engineering, Vol. 4, No. 3, 2007, pp. 139-146

 en SORPTION AND DESORPTION STUDIES OF METALLIC ZINC ON AN ALLUVIAL SOIL
Tiwari, R. P.; Bala Ramudu, P.; Srivastava, R. K. & Gupta, M. K.

Abstract

The sorption of metallic zinc from the pH-adjusted aqueous solution at varying initial concentrations onto a clay soil through batch equilibrium experiments has been studied. The pH of the initial concentrations ranging between 50 mg/L to 250 mg/L has been varied from 3 to 7. The sorption data fitted very well with both Langmuir and Freundlich isotherm models and Freundlich model gave higher correlation coefficients. The maximum sorption of metallic zinc occurred at pH=6. The pseudo-second order kinetics model was most agreeable with the experimental sorption data, whereas the pseudo-first order model was found to be insufficient. A nonionic surfactant was tested for its desorption potential and was found to be fairly effective at 2% concentration with removal of more than 60% sorbed Zinc. Key words: Sorption, isotherms, desorption, zinc

 
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