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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. 11, No. 6, 2014, pp. 1669-1678
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Bioline Code: st14163
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. 11, No. 6, 2014, pp. 1669-1678
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A novel approach for textile dye degradation by zinc, iron–doped tin oxide/titanium moving anode
Vignesh, A.; Siddarth, A.S.; Gokul, O.S. & Babu, B.R.
Abstract
The present contribution reports a moving iron
(Fe), zinc (Zn)–doped tin oxide/titanium (SnO2/Ti) anodebased
system designed and operated for the electro-oxidation
of methyl orange dye effluent. Electrochemical
oxidation of the dye was carried out at a current density of
1.8 A/dm2 for 120 min. Similar experiments were repeated
with pure SnO2-based static and moving anode-based
systems and the Fe, Zn-doped SnO2 static anode-based
electro-oxidation system. Post oxidation, the surface of the
electrodes was critically examined by scanning electron
microscopy. Dye samples were analysed at regular intervals
during the electro-oxidation process by chemical
oxygen demand and colour removal measurements and
characterized by UV–Vis spectroscopy and Fourier transform
infrared spectroscopy at the end of the oxidation
process. The obtained results elucidate the superiority of
Fe, Zn-doped SnO2/Ti moving anode-based system for
methyl orange dye effluent electro-oxidation. The moving
anode prevents passive layer formation and decreases
polarization resistance. Doping of Fe and Zn provides the
anode-enhanced mechanical strength and electrocatalytic
activity. The combined effects of axial anode movement
and doping are responsible for improved performance of
the moving anode system reported in this contribution.
Keywords
Electrochemical treatment; SnO2-doped electrodes; Methyl orange; Chemical oxygen demand (COD); Scanning electron microscopy (SEM); Fourier Transform infrared spectroscopy (FT-IR)
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