Journal :   Asian Journal of Research in Chemistry

Volume No. :   3

Issue No. :  3

Year :  2010

Pages :   591-595

ISSN Print :  0974-4169

ISSN Online :  0974-4150


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Equilibrium Studies for Hg (II) Adsorption from Aqueous Solutions by Hydrous Ferric Oxide and Tungsten Oxide



Address:   Som Shankar Dubey*, Battula Sreenivasa Rao and A.V.D. Nagendra Kumar
Department of Chemistry, Gitam Institute of Technology, Gitam University, Visakhapatnam-530045, India
*Corresponding Author
DOI No:

ABSTRACT:
Radiotracer technique has been used to study the removal behavior of Hg (II) ions from aqueous solutions by synthesized and well characterized hydrous ferric oxide (HFO) and hydrous tungsten oxide (HTO). Adsorptive concentration (10-4–10-8 mol dm-3), pH (ca 4.0-10.0) and temperature (303-333 K) were examined for assessing optimal conditions for removal of these ions. The uptake of Hg (II) ions, which fitted well for Freundlich isotherm, increased with increase in the temperature and no significant desorption took place in the studied temperature range. The presence of some anions/cations affected the uptake of metal ion markedly. Irradiation of hydrous ferric oxide and tungsten oxide by using a 11.1 x 109 Bq (Ra-Be) neutron source having a neutron flux of 3.9 x 106 cm-2 s-1 with associated g-dose rate of 1.72 Gy/h did not influence the extent of adsorption of Hg (II) significantly.
KEYWORDS:
Hg (II)/ Hydrous Ferric Oxide/Tungsten Oxide/Adsorption / Freundlich Isotherm/Desorption.
Cite:
Som Shankar Dubey, Battula Sreenivasa Rao, A.V.D. Nagendra Kumar. Equilibrium Studies for Hg (II) Adsorption from Aqueous Solutions by Hydrous Ferric Oxide and Tungsten Oxide. Asian J. Research Chem. 3(3): July- Sept. 2010; Page 591-595.
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