Defluoridation of water by Tea-bag model using La3+ modified synthetic resin@chitosan biocomposite

Published Date
Available online 31 May 2016, doi:10.1016/j.ijbiomac.2016.05.11

In Press, Accepted Manuscript — Note to users

Title 

Defluoridation of water by Tea-bag model using La³⁺modified synthetic resin@chitosan biocomposite

• Author 

• Subbaiah Muthu Prabhu ^a,b,
• S.SD. Elanchezhiyan ^a
• Giehyeon Lee ^a,b,
• Sankaran Meenakshi^a,,,

• aDepartment of Chemistry, The Gandhigram Rural Institute, Deemed University Gandhigram, 624 302, Dindigul, Tamil Nadu, India
• bDepartment of Earth System Sciences, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul, 120 749, Republic of Korea

Received 29 March 2016. Revised 15 May 2016. Accepted 30 May 2016. Available online 31 May 2016.

Highlights

• •
  CS@La-IDAMPcompositeusedforF⁻removalusingTea-bagmodelMaximumDCwasobservedat12mincontacttimeF⁻adsorptionionwasspontaneous(*), endothermic and thermodynamically feasible process.
• •
  The fluoride removal was by both electrostatic interaction and ion exchange mechanism

Abstract

The aim of this work is to gain a better understanding of the formation of lanthanum complex onto iminodiacetic acid and chitosan blends for effective removal of fluoride from aqueous solution using a tea-bag model for the first time. The surface textural and chemical properties of the synthesized blends were characterized by FTIR, SEM with EDAX and mapping images. The experimental data revealed that the fluoride adsorption was rapid, maximum fluoride removal could be removed within 12 min contact time at neutral pH in room temperature under batch equilibrium model. The equilibrium data for adsorption of fluoride on the synthesized blends were well represented by the Freundlich isotherm, giving a maximum adsorption capacity of 17.50 mg/g. The adsorption kinetic models were also examined and it was found that all the sorption processes were better described by the pseudo-second-order model. This result suggested that the efficiency of the fluoride removal process was mainly controlled by electrostatic attraction and ion-exchange mechanism. Furthermore, the adsorbent material was tested for the regeneration ability with the suitable regenerant to make this process as cost-effective. Finally, it can be concluded that the blend material is the potential material for the treatment of fluoride from water.

Keywords

• Chitosan
• Iminodiacetic acid resin
• Lanthanum
• Fluoride
• Adsorption

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• ⁎ 
  Corresponding author

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