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Chavan AA, Li H, Scarpellini A, et al. Elastomeric Nanocomposite Foams for the Removal of Heavy Metal Ions from Water. ACS Appl Mater Interfaces. 2015;7(27):14778-84doi: 10.1021/acsami.5b03003.
Chavan, A. A., Li, H., Scarpellini, A., Marras, S., Manna, L., Athanassiou, A., & Fragouli, D. (2015). Elastomeric Nanocomposite Foams for the Removal of Heavy Metal Ions from Water. ACS applied materials & interfaces, 7(27), 14778-84. https://doi.org/10.1021/acsami.5b03003
Chavan, Asmita A, et al. "Elastomeric Nanocomposite Foams for the Removal of Heavy Metal Ions from Water." ACS applied materials & interfaces vol. 7,27 (2015): 14778-84. doi: https://doi.org/10.1021/acsami.5b03003
Chavan AA, Li H, Scarpellini A, Marras S, Manna L, Athanassiou A, Fragouli D. Elastomeric Nanocomposite Foams for the Removal of Heavy Metal Ions from Water. ACS Appl Mater Interfaces. 2015 Jul 15;7(27):14778-84. doi: 10.1021/acsami.5b03003. Epub 2015 Jul 02. PMID: 26133912.
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ACS Appl Mater Interfaces. 2015 Jul 15;7(27):14778-84. doi: 10.1021/acsami.5b03003. Epub 2015 Jul 02.

Elastomeric Nanocomposite Foams for the Removal of Heavy Metal Ions from Water.

ACS applied materials & interfaces

Asmita A Chavan, Hongbo Li, Alice Scarpellini, Sergio Marras, Liberato Manna, Athanassia Athanassiou, Despina Fragouli

Affiliations

  1. †Smart Materials, Nanophysics, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
  2. §Università degli Studi di Genova, Via Balbi 5, 16126 Genova, Italy.
  3. ‡Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.

PMID: 26133912 DOI: 10.1021/acsami.5b03003

Abstract

We report the fabrication and utilization of elastomeric polymer nanocomposite foams for the efficient removal of Pb2+ and Hg2+ heavy metal ions from polluted water. The polydimethylsiloxane (PDMS) foams are properly modified in order to become hydrophilic and allow the polluted water to penetrate in their volume. The ZnSe colloidal nanocrystals (NCs) that decorate the surface of the foams, act as active components able to entrap the metal ions. In this way, after the dipping of the nanocomposite foams in water polluted with Pb2+ or Hg2+, a cation exchange reaction takes place, and the heavy metal ions are successfully removed. The removal capacity for the Pb2+ ions exceeds 98% and the removal of Hg2+ ions approaches almost 100% in the studied concentrations region of 20-40 ppm. The reaction is concluded after 24 h, but it should be noticed that after the first hour, more than 95% of both the metal ions is removed. The color of the foams changes upon heavy metal ions entrapment, providing thus the opportunity of an easy detection of the presence of the ions in water. Taking into account that the fabricated foams provide good elastic properties and resistance to heat, they can be used in different conditions of water remediation.

Keywords: ZnSe nanocrystals; cation exchange; polydimethylsiloxane; surface properties; water remediation

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