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Authors
Affiliations
1 Department of Chemistry, Gitam Institute of Technology, Gitam University, Visakhapatnam-530045, IN
Source
Asian Journal of Research in Chemistry, Vol 3, No 3 (2010), Pagination: 591-595
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 11.1×109 Bq (Ra-Be) neutron source having a neutron flux of 3.9×106 cm-2 s-1 with associated γ-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.
