Silica coated magnetite particles for magnetic removal of Hg2+ from water

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abstract

The magnetic removal of Hg2+ from water has been assessed using silica coated magnetite particles. The magnetite particles were first prepared by hydrolysis of FeSO4 and their surfaces were modified with amorphous silica shells that were then functionalized with organic moieties containing terminal dithiocarbamate groups. Under the experimental conditions used, the materials reported here displayed high efficiency for Hg2+ uptake (74%) even at contaminant levels as low as 50 mu g l(-1). Therefore these eco-nanomagnets show great potential for the removal of heavy metal ions of polluted water, via magnetic separation. (c) 2010 Elsevier Inc. All rights reserved.

keywords

SOLID-PHASE EXTRACTION; IMMOBILIZED-DITHIOCARBAMATE DERIVATIVES; PLASMA-MASS SPECTROMETRY; AQUEOUS-SOLUTIONS; HEAVY-METALS; WASTE-WATER; ENVIRONMENTAL APPLICATIONS; TITANOSILICATE ETS-4; SURFACE MODIFICATION; NATURAL-WATERS

subject category

Chemistry

authors

Girginova, PI; Daniel-Da-Silva, AL; Lopes, CB; Figueira, P; Otero, M; Amaral, VS; Pereira, E; Trindade, T

our authors

foto Ana Luísa Daniel da Silva

Ana Luísa Daniel da Silva

Principal Researcher
foto Cláudia Batista Lopes

Cláudia Batista Lopes

Assistant Researcher
no photo

Paula Figueira

Laboratory Officer
foto Tito Trindade

Tito Trindade

Full professor
foto Vitor Brás Sequeira Amaral

Vitor Brás Sequeira Amaral

Full professor

Groups

G1 - Porous Materials and Nanosystems
G2 - Photonic, Electronic and Magnetic Materials
G5 - Biomimetic, Biological and Living Materials

acknowledgements

P.I. Girginova thanks Fundacao para a Ciencia e Tecnologia for a PhD Grant. We thank Dr. Benilde Costa (FCTUC) for the Mossbauer measurements and for the helpful discussions.

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Publication Details

type
Journal Article
year
2010
journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
volume
345
publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
issn
0021-9797
issue
2
digital object identifier
10.1016/j.jcis.2010.01.087
web of science article identifier
WOS:000276729200017

Journal Metrics (JCR 2019)

Journal Impact Factor
7.489
Journal Impact Factor (5 yrs)
6.171
category normalized journal percentile
80.818

Citations

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