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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 13, No. 4, 2016, pp. 1149-1158
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Bioline Code: st16108
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 13, No. 4, 2016, pp. 1149-1158
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Magnetite nanoplates decorated on anodized aluminum oxide nanofibers as a novel adsorbent for efficient removal of As(III)
Moradlou, O.; Dehghanpour Farashah, S.; Masumian, F. & Banazadeh, A. Z.
Abstract
In this study, arsenic as an environmental top-ranked
hazardous substance was efficiently removed by a
novel adsorbent fabricated by magnetite Fe3O4 nanoplates
decorated on anodized aluminum oxide (AAO) nanofibers.
AAO nanofibers were prepared by anodic polarization
method, and then Fe3O4 nanoplates were grown on AAO-based
substrate by hydrothermal method to fabricate AAO/Fe3O4 nanosorbent. Morphology of the fabricated adsorbents
was characterized by field emission scanning electron
microscopy (FE-SEM), and their crystallinity was studied
by X-ray diffraction (XRD). Arsenic (III) removal potential
of the proposed adsorbent from contaminated water samples
was investigated by the determination of As(III)
amounts in the samples by inductively coupled plasma
optical emission spectroscopy before and after adsorption
process at sub-µg L-1 levels. The results showed that
without pre- and post-treatments such as pH adjustment,
As(III) was removed effectively from contaminated water
samples by using the proposed adsorbent. AAO/Fe3O4
sorbent showed excellent ability to remove 0.1 mg L-1
As(III) from water samples up to 96 % uptake. Freundlich
adsorption isotherm model was used to interpret the As(III)
adsorption on proposed sorbent. The Freundlich isotherm
parameters n and kF were obtained to be 2.2 and 10.2,
respectively, representing the high affinity of proposed
adsorbent for arsenic removal.
Keywords
Magnetite Fe3O4 nanoplates; Anodized aluminum oxide nanofibers; Arsenic removal; Water samples
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