362626 Efficient Removal of Fluoride By Lanthanum Modified Carbon Nanoparticles (LMCN)

Thursday, November 20, 2014: 4:55 PM
312 (Hilton Atlanta)
Chenghong WANG, Xue Guo and J. Paul Chen, Department of Civil & Environmental Engineering, National University of Singapore, Singapore, Singapore

Excessive fluoride existing in water could result in serious environmental concerns as well as adverse health impact on human being. In the current study, a novel lanthanum-modified carbon nanoparticle (LMCN) was prepared as adsorbent and applied for fluoride removal from aqueous solution. Excellent removal efficiency was observed under a wide range of solution pH, and the maximum adsorption capacity at pH 7 reached up to 48.70mg/g. Further, it was found that 90% removal could be accomplished within the first 1 hour. The adsorption performance can be modeled by Freundlich isotherm at lower equilibrium solute concentration, while Langmuir isotherm better fits the adsorption process when solute concentration is higher. Moreover, the influence of co-existing anions such as PO43-, HCO3-, SO42-, SiO32-, AsO43- and humid acid (HA) on the adsorption process was studied. It was found that the fluoride removal efficiency decreased with the increase of ionic strength in the aqueous solution, while no significant impact was identified with the presence of HA. To conclude, LMCN as a low-cost adsorbent can provide fast fluoride removal from aqueous solution with considerably high adsorption efficiency, which leads to potentially wide applications in water treatment.

Extended Abstract: File Not Uploaded
See more of this Session: Adsorbent Materials for Sustainable Energy and Chemicals
See more of this Group/Topical: Separations Division