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Issue 58, 2015
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Reversible magnetic mercury extraction from water

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Abstract

A facile and efficient way to decontaminate mercury(II) polluted water with the aid of magnetic, highly stable and recyclable carbon coated cobalt (Co/C) nanoparticles is reported. Comparing non-functionalised Co/C nanomagnets with particles that were functionalised with amino moieties, the latter one proved to be more effective for scavenging mercury with respect to extraction capacity and recyclability. A novel nanoparticle–poly(ethyleneimine) hybrid (Co/C–PEI) prepared by direct ring opening polymerization of aziridine initiated by an amine functionalised nanoparticle surface led to a high capacity material (10 mmol amino groups per g nanomaterial) and thus proved to be the best material for scavenging toxic mercury at relevant concentrations (mg L−1/μg L−1) for at least 6 consecutive cycles. On a large-scale, 20 L of drinking water with an initial Hg2+ concentration of 30 μg L−1 can be decontaminated to the level acceptable for drinking water (≤2 μg L−1) with just 60 mg of Co/C–PEI particles.

Graphical abstract: Reversible magnetic mercury extraction from water

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Supplementary files

Article information


Submitted
11 Mar 2015
Accepted
14 May 2015
First published
15 May 2015

This article is Open Access

RSC Adv., 2015,5, 46430-46436
Article type
Paper
Author version available

Reversible magnetic mercury extraction from water

S. Fernandes, C. M. Eichenseer, P. Kreitmeier, J. Rewitzer, V. Zlateski, R. N. Grass, W. J. Stark and O. Reiser, RSC Adv., 2015, 5, 46430
DOI: 10.1039/C5RA04348D

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