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

Penka I Girginova; Ana L Daniel-da-Silva; Cláudia B Lopes; Paula Figueira; Marta Otero; Vítor S Amaral; Eduarda Pereira; Tito Trindade

doi:10.1016/j.jcis.2010.01.087

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

J Colloid Interface Sci. 2010 May 15;345(2):234-40. doi: 10.1016/j.jcis.2010.01.087. Epub 2010 Feb 6.

Authors

Penka I Girginova¹, Ana L Daniel-da-Silva, Cláudia B Lopes, Paula Figueira, Marta Otero, Vítor S Amaral, Eduarda Pereira, Tito Trindade

Affiliation

¹ Department of Chemistry, CICECO or CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.

PMID: 20202646
DOI: 10.1016/j.jcis.2010.01.087

Abstract

The magnetic removal of Hg(2+) from water has been assessed using silica coated magnetite particles. The magnetite particles were first prepared by hydrolysis of FeSO(4) 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 Hg(2+) uptake (74%) even at contaminant levels as low as 50 μg l(-1). Therefore these eco-nanomagnets show great potential for the removal of heavy metal ions of polluted water, via magnetic separation.