Paper Information

Journal:   IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE)   SUMMER 2007 , Volume 4 , Number 3; Page(s) 139 To 146.
 
Paper: 

SORPTION AND DESORPTION STUDIES OF METALLIC ZINC ON AN ALLUVIAL SOIL

 
 
Author(s):  TIWARI R.P.*, BALA RAMUDU P., SRIVASTAVA R.K., GUPTA M.K.
 
* DEPARTMENT OF CIVIL ENGINEERING, MOTILAL NEHRU NATIONAL INSTITUTE OF TECHNOLOGY, ALLAHABAD (UTTAR PRADESH) 211004, INDIA
 
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.

 
Keyword(s): SORPTION, ISOTHERMS, DESORPTION, ZINC
 
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