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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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Publication details

The article was received on 11 Mar 2015, accepted on 14 May 2015 and first published on 15 May 2015


Article type: Paper
DOI: 10.1039/C5RA04348D
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Citation: RSC Adv., 2015,5, 46430-46436
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    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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