Fluoride removal from water by granular ceramic adsorption

SEM reveals the surface morphology of the ceramic granules before adsorption and after adsorption. A new medium, granular ceramic, has been developed for fluoride removal from water. Granular ceramic is a solid-phase medium that produces a stable Al–Fe surface complex for fluoride adsorption. BET, S...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2010-08, Vol.348 (2), p.579-584
Main Authors: Chen, Nan, Zhang, Zhenya, Feng, Chuanping, Sugiura, Norio, Li, Miao, Chen, Rongzhi
Format: Article
Language:English
Subjects:
Adsorption
Adsorption isotherms
Adsorption kinetics
Ceramics - chemistry
Chemistry
Exact sciences and technology
Fluoride removal
Fluorides - adverse effects
Fluorides - chemistry
Fluorides - isolation & purification
General and physical chemistry
Granular ceramic
Hydrogen-Ion Concentration
Kinetics
Particle Size
Surface physical chemistry
Water - chemistry
Water Purification - methods
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:SEM reveals the surface morphology of the ceramic granules before adsorption and after adsorption. A new medium, granular ceramic, has been developed for fluoride removal from water. Granular ceramic is a solid-phase medium that produces a stable Al–Fe surface complex for fluoride adsorption. BET, SEM, and EDS were used to characterize the physical attributes (particle size, pore size and distribution, surface roughness) of the granular ceramic. Fluoride adsorption characteristics were studied in a batch system with respect to changes in initial concentration of fluoride, pH of solution, and coexisting ions. Fluoride adsorption was found to be pH dependent and the maximum removal of fluoride was obtained at pH 5.0–8.0. equilibrium adsorption data were obtained at 293, 303, and 323 K, and interpreted in terms of the Langmuir and Freundlich isotherm equations. The experimental data revealed that the Freundlich isotherm equation gives a more satisfactory fit for fluoride removal. The adsorption process was observed to follow a pseudo-second-order kinetic model and intraparticle diffusion was indicated to play a major role in fluoride uptake. Fluoride adsorption was reduced in the presence of phosphate and sulfate ions and increased slightly in the presence of chloride and nitrate ions.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2010.04.048