NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(5) [September 2010] >


Title: Equilibrium, kinetic and thermodynamic studies on biosorption of copper and zinc from mixed solution by Erythrina variegata orientalis leaf powder
Authors: Bai, M Tukaram
Komali, K
Venkateswarlu, P
Keywords: Erythrina variegata orientalis
Biosorption
Cu-Zn mixture
Kinetics
Isotherms
Themodynamic parameters
Issue Date: Sep-2010
Publisher: NISCAIR-CSIR, India
Abstract: Present investigation is undertaken to explore the feasibility of biosorption for the removal of copper and zinc from aqueous Cu-Zn solution using Erythrina variegata orientalis leaf powder. Batch investigations indicate that biosorption of Cu-Zn mixture is gradually increased with increase in pH from 1 to 6 (38.25 to 44.77 mg/g). The biosorption of Cu-Zn mixture is increased from 86.3 to 91.9% (86.27 to 45.93 mg/g) with increase in biosorbent dosage from 1 to 2 g/L. 91.9% (45.93 mg/g) of Cu-Zn mixture is removed from the solution containing 100 mg/L of Cu and Zn agitated with 2 g/L of 45 mm size adsorbent for an equilibrium agitation time of 30 min. The experimental data are well described by Langmuir (R2=0.99), Freundlich (R2=0.98) and Temkin (R2=0.98) isotherms. The sorption studies follow the second order rate expression (R2 = 0.99) and rate constant is 9.39 g/mg-min. The biosorption is found to increase with decrease in temperature of the solution. From the thermodynamic parameters, sorption is found to be exothermic and reversible.
Page(s): 346-355
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.17(5) [September 2010]

Files in This Item:

File Description SizeFormat
IJCT 17(5) 346-355.pdf205.26 kBAdobe PDFView/Open
 Current Page Visits: 663 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 593520 since 06-Feb-2009  Last updated on 18-Sep-2014Webmaster: nopr@niscair.res.in