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Molecules 2015, 20(3), 3783-3790; doi:10.3390/molecules20033783

Inorganic Mercury Sequestration by a Poly(ethylene imine) Dendrimer in Aqueous Solution

1
Instituto de Ciencia Molecular, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
2
Department of Chemistry "Ugo Schiff", via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 26 January 2015 / Revised: 12 February 2015 / Accepted: 15 February 2015 / Published: 26 February 2015
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Abstract

The interaction of the G-2 poly(ethylene imine) dendrimer L, derived from ammonia as initiating core, with Hg(II) and HgCl42− was studied in aqueous solution by means of potentiometric (pH-metric) measurements. Speciation of these complex systems showed that L is able to form a wide variety of complexes including 1:1, 2:1, 3:1 and 3:2 metal-to-ligand species, of different protonation states, as well as the anion complexes [(H7L)HgCl4]5+ and [(H8L)HgCl4]6+. The stability of the metal complexes is very high, making L an excellent sequestering agent for Hg(II), over a large pH range, and a promising ligand for the preparation of functionalized activated carbons to be employed in the remediation and the prevention of environmental problems. View Full-Text
Keywords: mercury; dendrimers; poly(ethylene imine); contamination; remediation mercury; dendrimers; poly(ethylene imine); contamination; remediation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Serrano, E.S.; Savastano, M.; Bianchi, A. Inorganic Mercury Sequestration by a Poly(ethylene imine) Dendrimer in Aqueous Solution. Molecules 2015, 20, 3783-3790.

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