- Title
- Synthesis and characterization of zeolite-based composites functionalized with nanoscale zero-valent iron for removing arsenic in the presence of selenium from water
- Creator
- Suazo-Hernández, Jonathan; Sepúlveda, Pamela; Manquián-Cerda, Karen; Ramírez-Tagle, Rodrigo; Rubio, María Angélica; Bolan, Nanthi; Sarkar, Binoy; Arancibia-Miranda, Nicolás
- Relation
- Journal of Hazardous Materials Vol. 373, Issue 5 July 2019, p. 810-819
- Publisher Link
- http://dx.doi.org/10.1016/j.jhazmat.2019.03.125
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2019
- Description
- We studied the sorption of As(V) in single and multi-component (As(V)-Se(VI)) aqueous systems using nanoscale zero-valent iron (nZVI) and nZVI-functionalized zeolite (Z-nZVI) adsorbents. Morphological and physico-chemical characterization of the adsorbents was conducted using X-ray diffraction (XRD), scanning electron microscopy (SEM), surface area and electrophoretic mobility measurements. SEM and XRD analyses showed that Fe-nanoparticle size and crystallinity were better preserved in Z-nZVI than nZVI after As(V) sorption. Highly efficient As(V) removal was achieved for all tested adsorbents with a minimal competition effect of Se(VI). In the single-component system, the equilibrium As(V) sorption time on nZVI and Z-nZVI was 40 and 60 min, respectively, while in the multi-component system, this time was 90 min for both the adsorbents. The Freundlich and pseudo-second-order models provided good fittings for the experimental sorption data (r2>0.96). The As(V) removal capacity was higher using Z-nZVI than nZVI both in the single and multi-component systems, suffering minimal differences in removal in both cases. The results suggested that Z-nZVI had more specific surface sites for As(V) than nZVI and zeolite, which makes Z-nZVI a more effective adsorbent than nZVI for the removal of As(V) from aqueous solutions in the presence of other oxyanions.
- Subject
- zeolite; nZVI; arsenic-selenium sorption; competition effect; water treatment; SDG 6; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1400205
- Identifier
- uon:34738
- Identifier
- ISSN:0304-3894
- Rights
- © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
- Language
- eng
- Full Text
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