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

Amit Bhatnagar, Eva Kumar, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

248 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 languageEnglish
Pages (from-to)317-323
Number of pages7
JournalChemical Engineering Journal
Volume163
Issue number3
DOIs
Publication statusPublished - Oct 2010
Externally publishedYes

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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