Core-shell magnetite-silica dithiocarbamate-derivatised particles achieve the Water Framework Directive quality criteria for mercury in surface waters
authors Lopes, CB; Figueira, P; Tavares, DS; Lin, Z; Daniel-da-Silva, AL; Duarte, AC; Rocha, J; Trindade, T; Pereira, E
nationality International
journal ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
author keywords Mercury; Nanoporous; Titanosilicates; Magnetite particles; Dithiocarbamate functionalisation; Water treatment; Water Framework Directive
keywords HEAVY-METAL IONS; EFFICIENT REMOVAL; NATURAL-WATERS; SORPTION; HG2+; GEL; NANOPARTICLES; EQUILIBRIUM; ADSORBENT; ISOTHERM
abstract The sorption capacity of nanoporous titanosilicate Engelhard titanosilicate number 4 (ETS-4) and silica-coated magnetite particles derivatised with dithiocarbamate groups towards Hg(II) was evaluated and compared in spiked ultra-pure and spiked surface-river water, for different batch factors. In the former, and using a batch factor of 100 m(3)/kg and an initial Hg(II) concentrations matching the maximum allowed concentration in an effluent discharge, both materials achieve Hg(II) uptake efficiencies in excess of 99 % and a residual metal concentration lower than the guideline value for drinking water quality. For the surface-river water and the same initial concentration, the Hg(II) uptake efficiency of magnetite particles is outstanding, achieving the quality criteria established by the Water Framework Directive (concerning Hg concentration in surface waters) using a batch factor of 50 m(3)/kg, while the efficiency of ETS-4 is significantly inferior. The dissimilar sorbents' Hg(II) removal efficiency is attributed to different uptake mechanisms. This study also highlights the importance of assessing the effective capacity of the sorbents under realistic conditions in order to achieve trustable results.
publisher SPRINGER HEIDELBERG
issn 0944-1344
year published 2013
volume 20
issue 9
beginning page 5963
ending page 5974
digital object identifier (doi) 10.1007/s11356-013-1615-z
web of science category Environmental Sciences
subject category Environmental Sciences & Ecology
unique article identifier WOS:000322155400007
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.800
5 year journal impact factor 2.989
category normalized journal impact factor percentile 65.909
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg