Research Paper

Journal of Nanoparticle Research

, Volume 11, Issue 8, pp 1981-1989

First online:

As(V) remediation using electrochemically synthesized maghemite nanoparticles

  • Hosik ParkAffiliated withDepartment of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST)
  • , Nosang V. MyungAffiliated withDepartment of Chemical and Environmental Engineering and Center for Nanoscale Science and Engineering, University of California-Riverside Email author 
  • , Haeryong JungAffiliated withNuclear Engineering and Technology Institute (NETEC), Korea Hydro and Nuclear Power Co. Ltd. (KHNP)
  • , Heechul ChoiAffiliated withDepartment of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST) Email author 

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


Maghemite nanoparticles were electrochemically synthesized from environmentally benign solutions in ambient conditions and utilized to remediate As(V) from aqueous solution. The average size and surface area of the maghemite nanoparticles were controlled to be 11–23 nm and 41–49 m2 g−1, respectively, by adjusting applied current density. The point of zero charge and crystallinity were independent of size. The effect of size and environmental conditions (i.e., maghemite nanoparticles content, contact time, and solution pH) on the adsorption of As(V) were systematically investigated. Similar to As(V) remediation using zero valent iron nanoparticles (NZVI), the kinetics of adsorption were best described by the pseudo first order model where the remediation is limited by the mass transfer of As(V) to adsorption sites of maghemite. The adsorption was spontaneous and endothermic which fitted with the Langmuir and Freundlich isotherms. The results observed in batch study indicate that maghemite nanoparticles were suitable adsorbent for remediating As(V) concentration to the limit (10 μg l−1) recommended by the World Health Organization (WHO).


Maghemite Adsorption As(V) Nanoparticles Electrochemical synthesis Langmuir and Freundlich isotherms Environment EHS