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New modified chitosan-based adsorbent for defluoridation of water

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Title New modified chitosan-based adsorbent for defluoridation of water
 
Creator Jagtap, Sneha
Thakre, Dilip
Wanjari, Snehal
Kamble, Sanjay
Labhsetwar, Nitin
Rayalu, Sadhana
 
Subject Materials Science
 
Description In the present study, the metal-binding property of chitosan is used to incorporate titanium metal
and applied as an adsorbent for fluoride adsorption. Titanium macrospheres (TM) were synthesized
by a precipitation method and characterized by FTIR, SEM, and XRD. The Langmuir and Freundlich
adsorption models were applied to describe the adsorption equilibrium and the adsorption capacities
were calculated. Thermodynamic parameters of standard free energy change (�G◦), standard enthalpy
change (�H◦), and standard entropy change (�S◦) were also calculated. The effects of various physicochemical
parameters such as pH, initial concentration, adsorbent dose, and the presence of coexisting
anions were studied. The fluoride uptake was maximum at neutral pH 7 and decreased in acidic and
alkaline pH. The presence of coexisting anions has a negative effect on fluoride adsorption. TM was
found to have very fast kinetics in the first 30 min and then the rate slowed down as equilibrium was
approached. A comparison of fluoride removal in simulated and field water shows a high adsorption
capacity in simulated water.
 
Publisher Elsevier
 
Date 2009
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1003/1/jagtap2009.pdf
Jagtap, Sneha and Thakre, Dilip and Wanjari, Snehal and Kamble, Sanjay and Labhsetwar, Nitin and Rayalu, Sadhana (2009) New modified chitosan-based adsorbent for defluoridation of water. Journal of Colloid and Interface Science, 332. pp. 280-290. ISSN 0021-9797
 
Relation https://www.journals.elsevier.com/journal-of-colloid-and-interface-science
http://neeri.csircentral.net/1003/