Record Details

Defluoridation of drinking water using chemically modified bentonite clay

IR@CSIR-NEERI

View Archive Info
 
 
Field Value
 
Title Defluoridation of drinking water using chemically modified bentonite clay
 
Creator Kamble, Sanjay P
Dixit, Priyadarshini
Rayalu, Sadhana S
Labhsetwar, Nitin
 
Subject Materials Science
 
Description Adsorption potential of metal oxide (lanthanum, magnesium and manganese) incorporated bentonite clay
was investigated for defluoridation of drinking water using batch equilibrium experiments to gain insight of
adsorption behavior, kinetics and mechanisms of adsorption of fluoride ion. The effect of various physicochemical
parameters such as pH, adsorbent dose, initial fluoride concentration and the presence of
interfering co-ions on adsorption of fluoride has been investigated. The 10%La-bentonite shows higher
fluoride uptake capacity for defluoridation of drinking water as compared to Mg-bentonite, Mn-bentonite
and bare bentonite clay. The uptake of fluoride in acidic pH was higher as compared to alkaline pH. The
equilibrium adsorption data fitted reasonably well in both Langmuir and Freundlich isotherm models. It was
also observed that in the presence of certain co-existing ions can have positive effect on removal of fluoride,
while carbonate and bicarbonate anions show deleterious effect. The rate of adsorption was reasonably rapid
and maximum fluoride uptake was attained within 30 min. The modified adsorbent material shows better
fluoride removal properties for actual field water, which could be due to the positive effect of other co-ions
present in the field water.
 
Publisher Elsevier
 
Date 2009
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1006/1/kamble2009.pdf
Kamble, Sanjay P and Dixit, Priyadarshini and Rayalu, Sadhana S and Labhsetwar, Nitin (2009) Defluoridation of drinking water using chemically modified bentonite clay. Desalination, 249. pp. 687-693. ISSN 0011-9164
 
Relation https://www.journals.elsevier.com/desalination
http://neeri.csircentral.net/1006/