Ultra-long magnetic nanochains for highly efficient arsenic removal from water

Gautom Kumar Das, Cecile S. Bonifacio, Julius De Rojas, Kai Liu, Klaus Van Benthem, Ian M. Kennedy

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The contamination of drinking water with naturally occurring arsenic is a global health threat. Filters that are packed with adsorbent media with a high affinity for arsenic have been used to de-contaminate water - generally iron or aluminium oxides are favored materials. Recently, nanoparticles have been introduced as adsorbent media due to their superior efficiency compared to their bulk counter-parts. An efficient nanoadsorbent should ideally possess high surface area, be easy to synthesize, and most importantly offer a high arsenic removal capacity. Achieving all the key features in a single step synthesis is an engineering challenge. We have successfully engineered such a material in the form of nanochains synthesized via a one step flame synthesis. The ultra-long γ-Fe2O3 nanochains possess high surface area (151.12 m2 g-1), large saturation magnetization (77.1 emu g -1) that aids in their gas phase self-assembly into long chains in an external magnetic field, along with an extraordinary arsenic removal capacity (162 mg g-1). A filter made with this material exhibited a relatively low-pressure drop and very little break-through of the iron oxide across the filter.

Original languageEnglish (US)
Pages (from-to)12974-12981
Number of pages8
JournalJournal of Materials Chemistry A
Volume2
Issue number32
DOIs
StatePublished - Aug 28 2014

Fingerprint

Arsenic
Water
Adsorbents
Flame synthesis
Aluminum Oxide
Saturation magnetization
Iron oxides
Potable water
Drinking Water
Self assembly
Pressure drop
Contamination
Gases
Health
Magnetic fields
Iron
Nanoparticles
Aluminum
Oxides
ferric oxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Das, G. K., Bonifacio, C. S., De Rojas, J., Liu, K., Van Benthem, K., & Kennedy, I. M. (2014). Ultra-long magnetic nanochains for highly efficient arsenic removal from water. Journal of Materials Chemistry A, 2(32), 12974-12981. https://doi.org/10.1039/c4ta02614d

Ultra-long magnetic nanochains for highly efficient arsenic removal from water. / Das, Gautom Kumar; Bonifacio, Cecile S.; De Rojas, Julius; Liu, Kai; Van Benthem, Klaus; Kennedy, Ian M.

In: Journal of Materials Chemistry A, Vol. 2, No. 32, 28.08.2014, p. 12974-12981.

Research output: Contribution to journalArticle

Das, GK, Bonifacio, CS, De Rojas, J, Liu, K, Van Benthem, K & Kennedy, IM 2014, 'Ultra-long magnetic nanochains for highly efficient arsenic removal from water', Journal of Materials Chemistry A, vol. 2, no. 32, pp. 12974-12981. https://doi.org/10.1039/c4ta02614d
Das GK, Bonifacio CS, De Rojas J, Liu K, Van Benthem K, Kennedy IM. Ultra-long magnetic nanochains for highly efficient arsenic removal from water. Journal of Materials Chemistry A. 2014 Aug 28;2(32):12974-12981. https://doi.org/10.1039/c4ta02614d
Das, Gautom Kumar ; Bonifacio, Cecile S. ; De Rojas, Julius ; Liu, Kai ; Van Benthem, Klaus ; Kennedy, Ian M. / Ultra-long magnetic nanochains for highly efficient arsenic removal from water. In: Journal of Materials Chemistry A. 2014 ; Vol. 2, No. 32. pp. 12974-12981.
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