Enhanced arsenic removal from water by a bimetallic material ZrOx-FeOx with high OH density
| Autor: | Esmeralda Vences-Alvarez, Jose Rene Rangel-Mendez, Luis F. Chazaro-Ruiz, H. Flores-Zúñiga, Alejandro Lopez-Valdivieso |
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| Rok vydání: | 2020 |
| Předmět: |
Health
Toxicology and Mutagenesis Inorganic chemistry Iron oxide chemistry.chemical_element 010501 environmental sciences 01 natural sciences Arsenic Water Purification Metal chemistry.chemical_compound Adsorption Spectroscopy Fourier Transform Infrared Environmental Chemistry Bimetallic strip 0105 earth and related environmental sciences Zirconium Water General Medicine Hydrogen-Ion Concentration Pollution Arsenic contamination of groundwater Kinetics chemistry visual_art visual_art.visual_art_medium Hybrid material Water Pollutants Chemical |
| Zdroj: | Environmental Science and Pollution Research. 27:33362-33372 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-020-09492-8 |
| Popis: | Arsenic in groundwater for human consumption has negative effects on human's health worldwide. Due to the above, it is essential to invest in the development of new materials and more efficient technology for the elimination of such priority contaminants as arsenic. Therefore, in the present work, it was synthesized an amorphous hybrid material ZrOx-FeOx with a high density of OH groups, to improve the arsenic adsorption capacity of iron (FeOx) and zirconium (ZrOx) that makes up the bimetallic oxyhydroxide. The spectra of FT-IR and pKa's distribution suggest that in the synthesized binary oxides, a new union between the two metallic elements is formed by means of an oxygen (metal-O-metal). In addition, TEM profiles suggest that there are chemical interactions between both metals since no individual particles of iron oxide and zirconium oxide were found. According to the results, the adsorption capacity of the ZrOx-FeOx material increases 4.5 and 1.4 times with respect to FeOx and ZrOx, respectively. At pH 6, the maximum adsorption capacity was 27 mg g-1, but at pH greater than 7, the arsenic adsorption capacity onto ZrOx-FeOx decreased 66%. Graphical Abstract. |
| Databáze: | OpenAIRE |
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