Nitrate removal from water by nano-alumina: Characterization and sorption studies

Amit Bhatnagar; Eva Kumar; Mika Sillanpää

doi:10.1016/j.cej.2010.08.008

Nitrate removal from water by nano-alumina: Characterization and sorption studies

Amit Bhatnagar, Eva Kumar, Mika Sillanpää

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

255 Citations (Scopus)

Abstract

The present study was conducted to evaluate the feasibility of nano-alumina for nitrate removal from aqueous solutions. The nature and morphology of sorbent was characterized by XRD, FTIR, BET and SEM analysis. Batch adsorption studies were performed as a function of contact time, initial nitrate concentration, temperature, pH and influence of other interfering anions. Nitrate sorption kinetics was well fitted by pseudo-second-order kinetic model. The maximum sorption capacity of nano-alumina for nitrate removal was found to be ca. 4.0mgg^-1 at 25±2°C. Maximum nitrate removal occurred at equilibrium pH ca. 4.4. The nitrate sorption has been well explained using Langmuir isotherm model. Results from this study demonstrated the potential utility of nano-alumina for nitrate removal from water.

Original language	English
Pages (from-to)	317-323
Number of pages	7
Journal	Chemical Engineering Journal
Volume	163
Issue number	3
DOIs	https://doi.org/10.1016/j.cej.2010.08.008
Publication status	Published - Oct 2010
Externally published	Yes

Keywords

Competing anions
Kinetic modeling
Nano-alumina
Nitrate removal
PH
Sorption isotherms

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cej.2010.08.008

Cite this

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title = "Nitrate removal from water by nano-alumina: Characterization and sorption studies",

abstract = "The present study was conducted to evaluate the feasibility of nano-alumina for nitrate removal from aqueous solutions. The nature and morphology of sorbent was characterized by XRD, FTIR, BET and SEM analysis. Batch adsorption studies were performed as a function of contact time, initial nitrate concentration, temperature, pH and influence of other interfering anions. Nitrate sorption kinetics was well fitted by pseudo-second-order kinetic model. The maximum sorption capacity of nano-alumina for nitrate removal was found to be ca. 4.0mgg-1 at 25±2°C. Maximum nitrate removal occurred at equilibrium pH ca. 4.4. The nitrate sorption has been well explained using Langmuir isotherm model. Results from this study demonstrated the potential utility of nano-alumina for nitrate removal from water.",

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T2 - Characterization and sorption studies

AU - Bhatnagar, Amit

AU - Kumar, Eva

AU - Sillanpää, Mika

PY - 2010/10

Y1 - 2010/10

N2 - The present study was conducted to evaluate the feasibility of nano-alumina for nitrate removal from aqueous solutions. The nature and morphology of sorbent was characterized by XRD, FTIR, BET and SEM analysis. Batch adsorption studies were performed as a function of contact time, initial nitrate concentration, temperature, pH and influence of other interfering anions. Nitrate sorption kinetics was well fitted by pseudo-second-order kinetic model. The maximum sorption capacity of nano-alumina for nitrate removal was found to be ca. 4.0mgg-1 at 25±2°C. Maximum nitrate removal occurred at equilibrium pH ca. 4.4. The nitrate sorption has been well explained using Langmuir isotherm model. Results from this study demonstrated the potential utility of nano-alumina for nitrate removal from water.

AB - The present study was conducted to evaluate the feasibility of nano-alumina for nitrate removal from aqueous solutions. The nature and morphology of sorbent was characterized by XRD, FTIR, BET and SEM analysis. Batch adsorption studies were performed as a function of contact time, initial nitrate concentration, temperature, pH and influence of other interfering anions. Nitrate sorption kinetics was well fitted by pseudo-second-order kinetic model. The maximum sorption capacity of nano-alumina for nitrate removal was found to be ca. 4.0mgg-1 at 25±2°C. Maximum nitrate removal occurred at equilibrium pH ca. 4.4. The nitrate sorption has been well explained using Langmuir isotherm model. Results from this study demonstrated the potential utility of nano-alumina for nitrate removal from water.

KW - Competing anions

KW - Kinetic modeling

KW - Nano-alumina

KW - Nitrate removal

KW - PH

KW - Sorption isotherms

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DO - 10.1016/j.cej.2010.08.008

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Nitrate removal from water by nano-alumina: Characterization and sorption studies

Abstract

Keywords

ASJC Scopus subject areas

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