Removal of arsenic and mercury species from water by covalent triazine framework encapsulated γ-Fe 2 O 3 nanoparticles.

Autor: Leus K; Department of Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Faculty of Sciences, Ghent University, Krijgslaan 281 (S3), 900 Ghent, Belgium. Electronic address: Karen.Leus@UGent.be., Folens K; Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium., Nicomel NR; Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium., Perez JPH; Department of Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Faculty of Sciences, Ghent University, Krijgslaan 281 (S3), 900 Ghent, Belgium; Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium., Filippousi M; EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium., Meledina M; EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium., Dîrtu MM; Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST) Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium., Turner S; EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium., Van Tendeloo G; EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium., Garcia Y; Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST) Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium., Du Laing G; Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium., Van Der Voort P; Department of Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Faculty of Sciences, Ghent University, Krijgslaan 281 (S3), 900 Ghent, Belgium. Electronic address: Pascal.Vandervoort@UGent.be.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2018 Jul 05; Vol. 353, pp. 312-319. Date of Electronic Publication: 2018 Apr 16.
DOI: 10.1016/j.jhazmat.2018.04.027
Abstrakt: The covalent triazine framework, CTF-1, served as host material for the in situ synthesis of Fe 2 O 3 nanoparticles. The composite material consisted of 20 ± 2 m% iron, mainly in γ-Fe 2 O 3 phase. The resulting γ-Fe 2 O 3 @CTF-1 was examined for the adsorption of As III , As V and Hg II from synthetic solutions and real surface-, ground- and wastewater. The material shows excellent removal efficiencies, independent from the presence of Ca 2+ , Mg 2+ or natural organic matter and only limited dependency on the presence of phosphate ions. Its adsorption capacity towards arsenite (198.0 mg g -1 ), arsenate (102.3 mg g -1 ) and divalent mercury (165.8 mg g -1 ) belongs amongst the best-known adsorbents, including many other iron-based materials. Regeneration of the adsorbent can be achieved for use over multiple cycles without a decrease in performance by elution at 70 °C with 0.1 M NaOH, followed by a stirring step in a 5 m% H 2 O 2 solution for As or 0.1 M thiourea and 0.001 M HCl for Hg. In highly contaminated water (100 μg L -1 ), the adsorbent polishes the water quality to well below the current WHO limits.
(Copyright © 2018 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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