NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.16 [2009] >
IJCT Vol.16(6) [November 2009] >

Title: Treatment of water contaminated with Pb(II) and Cd(II) by adsorption on kaolinite, montmorillonite and their acid-activated forms
Authors: Gupta, Susmita Sen
Bhattacharyya, Krishna G
Keywords: Kaolinite
Acid-activated clays
Issue Date: Nov-2009
Publisher: CSIR
Abstract: Removal of Pb(II) and Cd(II) from spiked water samples by adsorption on clays was studied in this work as a model for water treatment. Kaolinite and montmorillonite were used as the clay adsorbents and they were further activated by treating with 0.25 M H2SO4. All the adsorbents were characterized with respect to surface area, cation exchange capacity and structural features as revealed with XRD and FTIR measurements. The adsorption experiments were carried out in a batch process with the variation of initial concentration of metal ions, amount of clay, pH, time and temperature. The adsorption was favoured at higher pH. The clay-Pb(II) interactions attained equilibrium at 180 min, whereas clay-Cd(II) system required 240 min to reach the same. Both the systems follow second order kinetic model. Montmorillonite and its acid-treated form had better adsorption properties. The Langmuir monolayer capacity varied from 11.1 to 34.0 mg/g and from 9.9 to 33.2 mg/g for Pb(II) and Cd(II) ions, respectively depending on the clay. Pb(II) adsorbed exothermally while the processes were endothermic with Cd(II). Kaolinite, montmorillonite and their acid activated forms have good potential for taking up Pb(II) and Cd(II) from aqueous medium.
Page(s): 457-470
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.16(6) [November 2009]

Files in This Item:

File Description SizeFormat
IJCT 16(6) 457-470.pdf381.06 kBAdobe PDFView/Open
 Current Page Visits: 95 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  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 © 2015 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: 162089 since 01-Sep-2015  Last updated on 21-Jun-2016Webmaster: