Fluoride Sorption from Aqueous Solutions and Drinking Water by Magnesium, Cobalt, and Nickel Hydrotalcite-Like Compounds in Batch and Column Systems
- 22 March 2010
- journal article
- adsorption
- Published by Informa UK Limited in Separation Science and Technology
- Vol. 45 (6), 786-793
- https://doi.org/10.1080/01496390903562647
Abstract
Magnesium, nickel, and cobalt hydrotalcite-like compounds (MgAlHT, NiAlHT, and CoAlHT) were used to remove fluoride ions from aqueous solutions and drinking water in batch and column systems. Mg, Ni, and Co hydrotalcite like compounds with similar M2+:Al3+ ratios were synthesized. F− ions were determined in the remaining solutions using a fluoride ion selective electrode. Kinetic of the fluoride sorption from aqueous solutions by hydrotalcite-like compounds (HT) was best described by the pseudo-second-order model and the equilibrium was reached in less than 200 minutes for all cases (MgAlHT, NiAlHT and CoAlHT); however, this behavior was not observed for fluoride sorption from drinking water by NiAlHT. The sorption isotherms of the fluoride ion by hydrotalcite like compounds could be best fitted to the Langmuir and Freundlich models. NiAlHT showed the highest efficiency for the removal of fluoride ions from aqueous solutions in batch system. The removal of fluoride ions by NiAlHT from aqueous solutions was more efficient than from drinking water in both batch and column systems.Keywords
This publication has 27 references indexed in Scilit:
- Preparation and Properties of Coated Nitrogen Fertilizer with Slow Release and Water RetentionIndustrial & Engineering Chemistry Research, 2006
- Factors influencing the removal of fluoride from aqueous solution by calcined Mg–Al–CO3 layered double hydroxidesJournal of Hazardous Materials, 2006
- Physicochemical characterization and adsorption behavior of calcined Zn/Al hydrotalcite-like compound (HTlc) towards removal of fluoride from aqueous solutionJournal of Colloid and Interface Science, 2003
- Sorption of Fluoride Ions from Aqueous Solutions and Well Drinking Water by Thermally Treated HydrotalciteSeparation Science and Technology, 2003
- Removal of fluoride from aqueous solution by using red mudSeparation and Purification Technology, 2002
- Adsorption of fluoride from aqueous solution by acid treated spent bleaching earthJournal of Fluorine Chemistry, 2002
- Adsorption of fluoride onto mixed rare earth oxidesSeparation and Purification Technology, 2001
- Fluoride removal from brackish water by electrodialysisDesalination, 2001
- Activation and regeneration of a soil sorbent for defluoridation of drinking waterApplied Geochemistry, 2001
- Structure and Surface and Catalytic Properties of Mg-Al Basic OxidesJournal of Catalysis, 1998