Journal article
Synergistic effects of bismuth coupling on the reactivity and reusability of zerovalent iron nanoparticles for the removal of cadmium from aqueous solution
Science of the Total Environment, Vol.669, pp.333-341
15/06/2019
PMID: 30878939
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Abstract
Removal of cadmium (Cd2+), a highly toxic heavy metal, from aqueous solutions was investigated using nano zerovalent iron (Fe0). Cadmium was efficiently removed by Fe0, although reactivity and reusability of Fe0 was significantly promoted by coupling with bismuth (Bi). At a reaction time of 20 min, 85% and 96% Cd2+ was removed by Fe0 and Bi/Fe0, respectively, at first cycle using [Cd2+]0 = 10 mg/L and [Fe0]0 = [Bi/Fe0]0 = 1.0 g/L. However, Cd2+ removal efficiency was reduced to 12% and 80% at sixth cycle by Fe0 and Bi/Fe0, respectively. The X-Ray diffraction and energy dispersive X-Ray spectroscopy analysis proved successful formation of Fe0 by the chemical reduction method and also confirmed coupling of Bi with Fe0 to form bimetallic Bi/Fe0. The oxidation of Fe0 and Bi/Fe0 yielded electron that played significant role in the conversion of toxic Cd2+ into non-toxic Cd0. The reactivity of electron with Cd2+ was calculated to be 4.3 × 109 M−1 s−1. The pH of solution showed pronounced effects on the reactivity of both Fe0 and Bi/Fe0. Removal of Cd2+ by both Fe0 and Bi/Fe0 followed pseudo-first-order kinetic model. The conversion of Cd2+ into non-toxic Cd0 proved Fe0 and Bi/Fe0 to be highly efficient and rewarding in detoxification of Cd2+ and other toxic metals in aqueous environments.
Details
- Title
- Synergistic effects of bismuth coupling on the reactivity and reusability of zerovalent iron nanoparticles for the removal of cadmium from aqueous solution
- Creators
- Behzad Murtaza - COMSATS University IslamabadNoor S Shah - COMSATS University IslamabadMurtaza Sayed - University of PeshawarJaved Ali Khan - University of PeshawarMuhammad Imran - COMSATS University IslamabadMuhammad Shahid - COMSATS University IslamabadZia Ul Haq Khan - COMSATS University IslamabadAyesha Ghani - COMSATS University IslamabadGhulam Murtaza - University of Agriculture FaisalabadNawshad Muhammad - COMSATS University IslamabadMuhammad Shafique Khalid - COMSATS University IslamabadNabeel Khan Niazi - University of Agriculture Faisalabad
- Publication Details
- Science of the Total Environment, Vol.669, pp.333-341
- Publisher
- Elsevier BV
- Grant note
- The authors are highly thankful to the COMSATS University Islamabad (CUI) for providing financial support for this project through CUI Research Grant Program (CRGP) and COMSATS University Islamabad, Lahore Campus for providing characterization facilities. Dr Nabeel Khan Niazi is thankful to the University of Agriculture Faisalabad and the University of Southern Queensland, Australia. We are also grateful to the Higher Education Commission, Pakistan for financial support.
- Identifiers
- 991012951090602368
- Copyright
- © 2019 Elsevier B.V. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering; School of Environment, Science and Engineering
- Language
- English
- Resource Type
- Journal article