lnu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Lepidocrocite and its heat-treated forms as effective arsenic adsorbents in aqueous medium
Show others and affiliations
2012 (English)In: Chemical Engineering Journal, ISSN 1385-8947, Vol. 180, 159-169 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to investigate the adsorption potential of heat treated lepidocrocites (gamma-FeOOH) towards As(III) and As(V) ions in aqueous solutions. Initially, mesoporous lepidocrocite was synthesized, treated at different temperatures, and characterized using various analytical techniques. During the heating, transformation of lepidocrocite into hematite was observed. The adsorption of As(III) and As(V) was studied by batch experiments and the effects of different operational parameters e.g., adsorbent dose, solution pH, contact time, and the initial concentration of As(III)/(V) (isotherms) were studied. Lepidocrocite treated at 250 degrees C exhibited >99% and 94% adsorption from 50 mg/L As(V) and As(III) solutions, respectively with an adsorbent dose of 2.5 g/L. The highest uptake capacity was obtained for As(III) (55 mg/g) on lepidocrocite without the heat treatment and for As(V) (38 mg/g) on lepidocrocite treated at 250 degrees C, which was assigned to be a mixture of maghemite and hematite. The adsorption kinetic data fitted well with the pseudo-second-order model and the BiLangmuir isotherm had the best applicability to describe the adsorption equilibrium.

Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 180, 159-169 p.
National Category
Earth and Related Environmental Sciences
Research subject
Natural Science, Environmental Science
Identifiers
URN: urn:nbn:se:lnu:diva-21000DOI: 10.1016/j.cej.2011.11.030OAI: oai:DiVA.org:lnu-21000DiVA: diva2:543116
Available from: 2012-08-06 Created: 2012-08-06 Last updated: 2014-03-27Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Bhatnagar, Amit
In the same journal
Chemical Engineering Journal
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 29 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf