NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(3) [May 2005] >

Title: Fluoride adsorption studies of montmorillonite clay
Authors: Karthikeyan, G
Pius, Anitha
Alagumuthu, G
Keywords: Adsorption
fluoride removal
montmorillonite clay
Langmuir isotherm
Freundlich isotherm
Issue Date: May-2005
Publisher: CSIR
IPC CodeB01D15/00
Abstract: Batch adsorption studies were conducted to determine the effects of contact time and temperature on fluoride removal by montmorillonite clay at neutral pH. The adsorption of fluoride was studied at four different temperatures, viz. 30, 40, 50 and 60°C. The kinetics of adsorption as well as adsorption isotherms at different temperatures were studied. Adsorption obeyed both Langmuir and Freundlich isotherm models. The percentage of fluoride removed increased with time and reached an optimum level at 50th min. The material with particle size of 75 microns registered maximum percentage of fluoride adsorption, compared to the other particle sizes. Thermodynamic studies revealed that the adsorption of fluoride by montmorillonite is an endothermic process, showing increase in sorption at higher temperature. The negative values of ΔG° indicate the spontaneity of the sorption process. Adsorption takes place on the surface as well as through intraparticle diffusion pattern of the adsorbent material. SEM studies revealed the morphological characteristics of the untreated sorbents as well as the changes in the treated sorbents. X-ray diffraction studies also confirmed the deposition of fluoride on the surface of the clay material. FTIR studies showed the involvement of hydroxyl group present on the surface in the adsorption interaction.
Page(s): 263-272
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.12(3) [May 2005]

Files in This Item:

File Description SizeFormat
IJCT 12(3) 263-272.pdf655.6 kBAdobe PDFView/Open
 Current Page Visits: 107 
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: 164234 since 01-Sep-2015  Last updated on 21-Jun-2016Webmaster: