Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Comparative Study
, 25 (29), 28928-28941

Comparative Study of the Direct Black Removal by Fe, Cu, and Fe/Cu Nanoparticles

Comparative Study

Comparative Study of the Direct Black Removal by Fe, Cu, and Fe/Cu Nanoparticles

Mariane F Ourique et al. Environ Sci Pollut Res Int.


In this study, direct black dye removal was investigated using iron nanoparticles (Fe NPs), copper (Cu NPs), and Fe/Cu (Fe/Cu NPs). NPs were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Using a dose of 0.25 g L-1 of Fe, Cu, and Fe/Cu NPs, a degradation efficiency of 13, 26, and 43% respectively was obtained. For the 1.00 g L-1 dose, the efficiency increased to 100, 43, and 100%, respectively. Studies in anoxic and oxic conditions presented degradation rates, respectively, of 100 and 30% for Fe NPs, 90 and 50% for Fe/Cu NPs, and 40% in both reactions for Cu NPs, indicating that the mechanism of dye degradation by NPs is predominantly reducing under the conditions studied. The addition of EDTA decreased the dye removal rate for Fe, Cu, and Fe/Cu NPs at 27, 10, and 35%, respectively. In addition to the degradation, the adsorption phenomena of the by-products formed during the reaction were confirmed by the Fourier transform infrared (FTIR) analysis and verified by the desorption tests. Fe and Fe/Cu NPs showed the highest efficiency in direct black dye reductive degradation and adsorption of by-products, removing 100% of the dye at a dose of 1 g L-1 within 10 min of reaction. Graphical abstracts ᅟ.

Keywords: Cu(I); Fe(0); Metallic nanoparticles; Reductive processes; Textile dye.

Similar articles

See all similar articles

Cited by 1 PubMed Central articles


    1. J Hazard Mater. 2009 Jul 30;166(2-3):1127-33 - PubMed
    1. J Environ Manage. 2016 Jul 15;177:341-55 - PubMed
    1. Sci Total Environ. 2014 Jan 15;468-469:258-64 - PubMed
    1. J Hazard Mater. 2010 Dec 15;184(1-3):710-6 - PubMed
    1. J Colloid Interface Sci. 2015 Jan 15;438:87-93 - PubMed

Publication types

MeSH terms

LinkOut - more resources