Mercury in river, estuarine and seawaters - Is it possible to decrease realist environmental concentrations in order to achieve environmental quality standards?
authors Tavares, DS; Lopes, CB; Daniel-da-Silva, AL; Vale, C; Trindade, T; Pereira, ME
nationality International
journal WATER RESEARCH
author keywords Mercury; Sorption; Natural waters; Magnetite nanoparticles; Surface modification
keywords COATED MAGNETITE NANOPARTICLES; NATURAL SPIKED WATERS; HEAVY-METAL REMOVAL; MESOPOROUS SILICA; AQUEOUS-SOLUTIONS; ORGANIC-MATTER; REMEDIATION; PARTICLES; ADSORPTION; SORPTION
abstract Dithiocarbamate-functionalized magnetite nanoparticles (Fe3O4@SiO2/SiDTC) have been investigated as a convenient and effective sorbent for mercury removal from river, estuarine and sea waters, and their capability to decrease realistic environmental concentrations to the new environmental quality standards was evaluated. The sorption kinetics was well described by the Elovich model and the initial sorption rate was dependent of the sorbent dose. Except for river water sample, the Fe3O4@SiO2/SiDTC particles uptake 99.9% or more of the Hg(II) in the waters (initially at the concentration of 50 mu g/L), allowing to reach residual concentrations lower than the new environmental quality standards (70 ng/L) with only 10 mg/L of sorbent material. The distribution coefficients of mercuric ions between the magnetic particles and the different natural water types were above 10(3) mL/g for the river water and above 10(5) mL/g for the estuarine and sea waters. The differences observed between the water types can be attributed to different water composition (effect of the matrix), which plays an important role in the efficiency of the water treatment. (C) 2016 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0043-1354
year published 2016
volume 106
beginning page 439
ending page 449
digital object identifier (doi) 10.1016/j.watres.2016.10.031
web of science category Engineering, Environmental; Environmental Sciences; Water Resources
subject category Engineering; Environmental Sciences & Ecology; Water Resources
unique article identifier WOS:000388047500045
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  impact metrics
times cited (wos core): 1
journal impact factor (jcr 2016): 6.942
5 year journal impact factor (jcr 2016): 7.715
category normalized journal impact factor percentile (jcr 2016): 97.698
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