Effect of pH and temperature on Hg2+ water decontamination using ETS-4 titanosilicate
authors Lopes, CB; Otero, M; Lin, Z; Silva, CM; Pereira, E; Rocha, J; Duarte, AC
nationality International
journal JOURNAL OF HAZARDOUS MATERIALS
author keywords pH; Temperature; Mercury (II) removal; ETS-4 titanosilicate
keywords AQUEOUS-SOLUTION; MERCURY REMOVAL; IONS
abstract Batch stirred tank experiments were carried out to study the effect of pH (range 2-10, at 294 K) and temperature (277, 294 and 313 K, at pH 5) on the uptake of Hg2+ ions by ETS-4 microporous titanosilicate. Changes in the p H have a significant effect on the ETS-4 uptake efficiency, the optima I range being 4-6. Due to competition effects, the chemical used to adjust the pH of the Hg2+ solution also influences the uptake efficiency. Thermodynamic parameters for the uptake of Hg2+ ions were calculated. For the temperature range Studied, the Hg2+ sorption increased with decreasing temperature. (C) 2009 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0304-3894
year published 2010
volume 175
issue 1-3
beginning page 439
ending page 444
digital object identifier (doi) 10.1016/j.jhazmat.2009.10.025
web of science category Engineering, Environmental; Engineering, Civil; Environmental Sciences
subject category Engineering; Environmental Sciences & Ecology
unique article identifier WOS:000274490400054
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