The dicarboxylic acids like oxalic acid, malonic acid and succinic acid mediated graphene oxide–zirconium needle like complexes were synthesized and used to remove fluoride from simulated fluoride contaminated water. The adsorption of fluoride by dicarboxylic acids mediated graphene oxide–zirconium complexes were by both electrostatic interaction at acidic pH and ion-exchange mechanism at neutral pH. The maximum defluoridation capacity observed was 9.70 mg/g at the minimum contact time of 18 min at room temperature. Various batch equilibrium parameters like pH studies, contact time, common ion interference and temperature studies were optimized. The synthesized graphene oxide and graphene oxide supported complexes were characterized using UV–vis, FTIR, XRD and SEM with EDAX analysis to establish the mechanism of fluoride adsorption. The removal of fluoride was described by the pseudo-second-order reaction kinetics, Freundlich isotherm model and thermodynamic studies which indicates the nature of adsorption was endothermic and spontaneous. Regeneration studies depict that the dicarboxylic acid mediated graphene oxide–zirconium complex can be used as an effective adsorbent for the removal of fluoride ions from wastewater. Also, the field applicability of the material has been verified with field samples collected from nearby fluoride endemic villages.
|Number of pages||11|
|Journal||Journal of Inorganic and Organometallic Polymers and Materials|
|Publication status||Published - 2016 Jul 1|
Bibliographical noteFunding Information:
The authors, SSDE, and SM likes to thank University Grants Commission-Research Fellowship in Sciences for Meritorious Students (UGC-RFSMS), New Delhi, India for providing financial support to carry out this research work. SMP and GL were supported by Korea Ministry of Environment (MOE) as “K-COSEM Research Programs”.
© 2016, Springer Science+Business Media New York.
All Science Journal Classification (ASJC) codes
- Polymers and Plastics
- Materials Chemistry