Defluoridation from aqueous solutions by nano-alumina: Characterization and sorption studies

Eva Kumar; Amit Bhatnagar; Umesh Kumar; Mika Sillanpää

doi:10.1016/j.jhazmat.2010.11.102

Defluoridation from aqueous solutions by nano-alumina: Characterization and sorption studies

Eva Kumar, Amit Bhatnagar, Umesh Kumar, Mika Sillanpää

Research output: Contribution to journal › Article › peer-review

237 Citations (Scopus)

Abstract

The present study was conducted to evaluate the feasibility of nano-alumina (Al₂O₃) for fluoride adsorption from aqueous solutions. The nature and morphology of pure and fluoride-sorbed nano-alumina were characterized by SEM with EDX, XRD, and FTIR analysis. Batch adsorption studies were performed as a function of contact time, initial fluoride concentration, temperature, pH and influence of competing anions. Fluoride sorption kinetics was well fitted by pseudo-second-order model. The maximum sorption capacity of nano-alumina for fluoride removal was found to be 14.0mgg^-1 at 25°C. Maximum fluoride removal occurred at pH 6.15. The fluoride sorption has been well explained using Langmuir isotherm model. Fluoride sorption was mainly influenced by the presence of PO₄^3-, SO₄^2- and CO₃^2- ions.

Original language	English
Pages (from-to)	1042-1049
Number of pages	8
Journal	Journal of Hazardous Materials
Volume	186
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jhazmat.2010.11.102
Publication status	Published - 28 Feb 2011
Externally published	Yes

Keywords

Adsorption isotherms
Fluoride removal
Nano-alumina
PH
Sorption mechanism

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jhazmat.2010.11.102

Cite this

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title = "Defluoridation from aqueous solutions by nano-alumina: Characterization and sorption studies",

abstract = "The present study was conducted to evaluate the feasibility of nano-alumina (Al2O3) for fluoride adsorption from aqueous solutions. The nature and morphology of pure and fluoride-sorbed nano-alumina were characterized by SEM with EDX, XRD, and FTIR analysis. Batch adsorption studies were performed as a function of contact time, initial fluoride concentration, temperature, pH and influence of competing anions. Fluoride sorption kinetics was well fitted by pseudo-second-order model. The maximum sorption capacity of nano-alumina for fluoride removal was found to be 14.0mgg-1 at 25°C. Maximum fluoride removal occurred at pH 6.15. The fluoride sorption has been well explained using Langmuir isotherm model. Fluoride sorption was mainly influenced by the presence of PO43-, SO42- and CO32- ions.",

keywords = "Adsorption isotherms, Fluoride removal, Nano-alumina, PH, Sorption mechanism",

author = "Eva Kumar and Amit Bhatnagar and Umesh Kumar and Mika Sillanp{\"a}{\"a}",

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T1 - Defluoridation from aqueous solutions by nano-alumina

T2 - Characterization and sorption studies

AU - Kumar, Eva

AU - Bhatnagar, Amit

AU - Kumar, Umesh

AU - Sillanpää, Mika

PY - 2011/2/28

Y1 - 2011/2/28

N2 - The present study was conducted to evaluate the feasibility of nano-alumina (Al2O3) for fluoride adsorption from aqueous solutions. The nature and morphology of pure and fluoride-sorbed nano-alumina were characterized by SEM with EDX, XRD, and FTIR analysis. Batch adsorption studies were performed as a function of contact time, initial fluoride concentration, temperature, pH and influence of competing anions. Fluoride sorption kinetics was well fitted by pseudo-second-order model. The maximum sorption capacity of nano-alumina for fluoride removal was found to be 14.0mgg-1 at 25°C. Maximum fluoride removal occurred at pH 6.15. The fluoride sorption has been well explained using Langmuir isotherm model. Fluoride sorption was mainly influenced by the presence of PO43-, SO42- and CO32- ions.

AB - The present study was conducted to evaluate the feasibility of nano-alumina (Al2O3) for fluoride adsorption from aqueous solutions. The nature and morphology of pure and fluoride-sorbed nano-alumina were characterized by SEM with EDX, XRD, and FTIR analysis. Batch adsorption studies were performed as a function of contact time, initial fluoride concentration, temperature, pH and influence of competing anions. Fluoride sorption kinetics was well fitted by pseudo-second-order model. The maximum sorption capacity of nano-alumina for fluoride removal was found to be 14.0mgg-1 at 25°C. Maximum fluoride removal occurred at pH 6.15. The fluoride sorption has been well explained using Langmuir isotherm model. Fluoride sorption was mainly influenced by the presence of PO43-, SO42- and CO32- ions.

KW - Adsorption isotherms

KW - Fluoride removal

KW - Nano-alumina

KW - PH

KW - Sorption mechanism

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JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

IS - 2-3

ER -

Defluoridation from aqueous solutions by nano-alumina: Characterization and sorption studies

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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