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Synthesis of La-incorporated chitosan beads for fluoride removal from water

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Title Synthesis of La-incorporated chitosan beads for fluoride removal from water
 
Creator Thakare, Dilip
Jagtap, Sneha
Bansiwal, Amit
Labhsetwar, Nitin
Rayalu, Sadhana
 
Subject Materials Science
 
Description In this study, lanthanum incorporated chitosan beads (LCB) were synthesized using precipitation
method and tested for fluoride removal from drinking water. The effect of various parameters like
complexation and precipitation time, lanthanum loading and ammonia strength on fluoride removal
have been studied. It is observed that the parameters for the synthesis of LCB have significant influence
on development of LCB and in turn on fluoride removal capacity. The optimal condition for synthesis of
LCB includes lanthanum loading: 10 wt%, complexation time: 60 min, precipitation time: 60 min, drying
temperature: 75 8C for 72 h. The maximum fluoride adsorption capacity of LCB was found to be 4.7 mg/g
and negligible release of lanthanum ion was observed. XRD analysis shows the presence of lanthanum
hydroxide and amorphous nature of LCB. SEM of LCB shows the presence of oval lanthanum hydroxide
particles spread over the chitosan matrix. Fluoride adsorption capacity has been calculated by applying
Langmuir and Freundlich isotherms. The comparative study suggests that LCB shows four times greater
fluoride adsorption capacity than the commercially used activated alumina.
 
Publisher Elsevier
 
Date 2010
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1020/1/thakre2010%282%29.pdf
Thakare, Dilip and Jagtap, Sneha and Bansiwal, Amit and Labhsetwar, Nitin and Rayalu, Sadhana (2010) Synthesis of La-incorporated chitosan beads for fluoride removal from water. Journal of Fluorine Chemistry, 131. pp. 373-377. ISSN 0022-1139
 
Relation https://www.journals.elsevier.com/journal-of-fluorine-chemistry
http://neeri.csircentral.net/1020/