Design of hydrotalcite and biopolymers entrapped tunable cerium organic cubic hybrid material for superior fluoride adsorption

The excess fluoride in drinking water is serious risk which leads to fluorosis. The adsorption method is facile route for defluoridation studies. Hybrid adsorbent possesses unique advantages like high surface area and high stability has been employed for water treatment. In the present work, hydrota...

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Published in:Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2023-04, Vol.224, p.113190-113190, Article 113190
Main Authors: Jeyaseelan, Antonysamy, Viswanathan, Natrayasamy, Kumar, Ilango Aswin, Naushad, Mu
Format: Article
Language:English
Subjects:
adsorbents
Adsorption
alginates
Biopolymer
Biopolymers
Cerium
Chitosan
Defluoridation
electrostatic interactions
endothermy
Fluorides
fluorosis
hybrids
Hydrogen-Ion Concentration
Hydrotalcite
ion exchange
Kinetics
Metal Organic Frameworks
risk
sorption isotherms
surface area
Thermodynamics
Water Pollutants, Chemical
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Summary:The excess fluoride in drinking water is serious risk which leads to fluorosis. The adsorption method is facile route for defluoridation studies. Hybrid adsorbent possesses unique advantages like high surface area and high stability has been employed for water treatment. In the present work, hydrotalcite (HT) fabricated Ce-metal organic frameworks (MOFs) bridged with biopolymers (alginate and chitosan) namely HT-CeMOFs@Alg-CS cubic hybrid beads was developed and employed towards fluoride removal in batch mode. The fabricated HT-CeMOFs@Alg-CS beads were analyzed by DTA, FTIR, SEM, EDAX, TGA and XRD studies. Besides, FTIR and EDAX proved the affinity of HT-CeMOFs@Alg-CS cubic hybrid beads on fluoride was majorly attributed by electrostatic interaction, ion-exchange and complexation mechanism. To include detail insight into adsorption route; the kinetics, thermodynamic and isotherm studies were investigated for fluoride adsorption. The equilibrium data of HT-CeMOFs@Alg-CS cubic hybrid beads for fluoride adsorption was fitted with Langmuir isotherm model. Thermodynamic investigation results demonstrated that the fluoride adsorption was spontaneous with endothermic nature. The regeneration and field investigation results revealed that the developed HT-CeMOFs@Alg-CS cubic hybrid beads are reusable and more apt at field environment. [Display omitted] •HT-CeMOFs@Alg-CS beads were prepared for rapid fluoride adsorption.•HT-CeMOFs@Alg-CS beads remove fluoride via electrostatic attraction and complexation.•HT-CeMOFs@Alg-CS beads reused upto six cycles.•HT-CeMOFs@Alg-CS beads reduce fluoride concentration below the tolerance limit in field water.
ISSN:0927-7765
1873-4367
DOI:10.1016/j.colsurfb.2023.113190