Removal of mercury (II) by dithiocarbamate surface functionalized magnetite particles: Application to synthetic and natural spiked waters
authors Figueira, P; Lopes, CB; Daniel-da-Silva, AL; Pereira, E; Duarte, AC; Trindade, T
nationality International
journal WATER RESEARCH
author keywords Mercury; Magnetite particles; Dithiocarbamate functionalization; Isotherms; Water remediation
keywords MESOPOROUS SILICA; AQUEOUS-SOLUTIONS; COMPLEXED MERCURY; ACTIVATED CARBON; HG(II) IONS; ADSORPTION; EQUILIBRIUM; BIOSORPTION; LEAD; HG2+
abstract In order to take advantage of the high affinity between mercury and sulphur, magnetite (Fe(3)O(4)) particles functionalized with dithiocarbamate groups (CS(2)(-)), were synthesized to be used as a new type of sorbent to remove Hg (II) from synthetic and natural spiked waters. The effectiveness of this type of sorbent was studied, and its potential as cleanup agent for contaminated waters was assessed. Batch stirred tank experiments were carried out by contacting a volume of solution with known amounts of functionalized Fe(3)O(4) particles, in order to study the effect of sorbent dose, salinity, and the kinetics and the equilibrium of this unit operation. A complete Hg (II) removal (ca. 99.8%) was attained with 6 mg/L of magnetic particles for an initial metal concentration of 50 mu g/L. It was confirmed that highly complex matrices, such as seawater (ca. 99%) and river water (ca. 97%), do not affect the removal capacity of the functionalized magnetic particles. Concerning isotherms, no significant differences were observed between two- and three-parameter models (P = 0.05%); however, Sips isotherm provided the lowest values of SS and S(x/y), predicting a maximum sorption capacity of 206 mg/g, in the range of experimental conditions under study. The solid loadings measured in this essay surmount the majority of the values found in literature for other type of sorbents. (C) 2011 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0043-1354
year published 2011
volume 45
issue 17
beginning page 5773
ending page 5784
digital object identifier (doi) 10.1016/j.watres.2011.08.057
web of science category Engineering, Environmental; Environmental Sciences; Water Resources
subject category Engineering; Environmental Sciences & Ecology; Water Resources
unique article identifier WOS:000295894600043
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