| Literature DB >> 30476771 |
José de Oliveira Marques Neto1, Carlos Roberto Bellato2, Danilo de Castro Silva3.
Abstract
An adsorbent in the form of a CLCh/MWCNT/Fe film was prepared using multiple walled carbon nanotubes (MWCNT) doped with magnetic iron oxide and deposited in crosslinked chitosan (CLCh). The CLCh/MWCNT/Fe was characterized by Inductively Coupled Plasma Mass Spectrometry (ICP-MS), nitrogen (N2) adsorption/desorption, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS), Infrared Spectroscopy (IR) and Raman Spectroscopy. The CLCh/MWCNT/Fe film presented a maximum adsorption capacity for Cr(III) of 66.25 mg/g (150 min) and for Cr(VI) of 449.30 mg/g (60 min) at 25 °C. The CLCh/MWCNT/Fe can be easily removed from the aqueous solution by a mechanical separation or by magnetization due to its magnetic properties. In ten consecutive reutilization adsorption cycles the CLCh/MWCNT/Fe film presented efficiency losses of only 12% and 6% for the removal of Cr(III) and Cr(VI), respectively.Entities:
Keywords: Carbon nanotubes; Chitosan; Chromium removal; Magnetic separation
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Year: 2018 PMID： 30476771 DOI： 10.1016/j.chemosphere.2018.11.080
Source DB: PubMed Journal: Chemosphere ISSN： 0045-6535 Impact factor: 7.086