Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/19168
Title: Ferromagnetic Sorbents Based on Nickel Nanowires for Efficient Uptake of Mercury from Water
Author: Pinheiro, Paula C.
Tavares, Daniela S.
Daniel-da-Silva, Ana L.
Lopes, Claudia B.
Pereira, Eduarda
Araujo, Joao P.
Sousa, Celia T.
Trindade, Tito
Keywords: MAGNETIC NANOWIRES
REMOVAL
PARTICLES
NANOPARTICLES
NANOMATERIALS
REMEDIATION
ALUMINA
ARRAYS
Issue Date: 2014
Publisher: AMER CHEMICAL SOC
Abstract: This work reports the preparation of ferromagnetic nickel nanowires (NiNW) coated with dithiocarbamate-functionalized siliceous shells and its application for the uptake of aqueous Hg(II) ions by magnetic separation. NiNW with an average diameter and length of 35 nm and 5 mu m, respectively, were firstly prepared by Ni electrodeposition in an anodic aluminum oxide template. The NiNW surfaces were then coated with siliceous shells containing dithiocarbamate groups via a one-step procedure consisting in the alkaline hydrolytic co-condensation of tetraethoxysilane (TEOS) and a siloxydithio-carbamate precursor (SiDTC). A small amount of these new nanoadsorbents (2.5 mg.L-1) removed 99.8% of mercury ions from aqueous solutions with concentration 50 mu g.L-1 and in less than 24 h of contact time. This outstanding removal ability is attributed to the high affinity of the sulfur donor ligands to Hg(II) species combined with the high surface area-to-volume ratio of the NiNW.
Peer review: yes
URI: http://hdl.handle.net/10773/19168
DOI: 10.1021/am5010865
ISSN: 1944-8244
Publisher Version: 10.1021/am5010865
Appears in Collections:CESAM - Artigos
CICECO - Artigos
DQ - Artigos



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