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

University of Porto
Hamburg University of Technology
National Cheng Kung University
Lappeenranta University of Technology

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

259 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

UN SDGs

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

SDG 6 Clean Water and Sanitation

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

Access to Document

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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TY - JOUR

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

UR - https://www.scopus.com/pages/publications/79751533638

U2 - 10.1016/j.jhazmat.2010.11.102

DO - 10.1016/j.jhazmat.2010.11.102

M3 - Article

C2 - 21177029

AN - SCOPUS:79751533638

SN - 0304-3894

VL - 186

SP - 1042

EP - 1049

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

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

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