Experimental and theoretical study of Co sorption in clay montmorillonites
| Autor: | Marcela Andrea Taylor, R. E. Alonso, A.V. Gil Rebaza, Leonardo A. Errico, María Luciana Montes |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Work (thermodynamics)
Materials science Polymers and Plastics Environmental remediation AB INITIO Ciencias Físicas Analytical chemistry Ab initio Ingeniería 020101 civil engineering hyperfine parameters 02 engineering and technology Mass spectrometry 0201 civil engineering Ion purl.org/becyt/ford/1 [https] Biomaterials chemistry.chemical_compound HYPERFINE PARAMETERS study of Co sorption CLAY Hyperfine structure Ciencias Exactas Metals and Alloys Física Sorption purl.org/becyt/ford/1.3 [https] 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials Montmorillonite chemistry clay montmorillonites 0210 nano-technology CIENCIAS NATURALES Y EXACTAS Física de los Materiales Condensados |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.1088/2053-1591/aab4dd |
| Popis: | Montmorillonite (MMT) clays are 2:1 layered structures which in natural state may allocate different hydrated cations such as M-nH2O (M= Na, Ca, Fe, etc) in its interlayer space. Depending on the capability for ion sorption, these materials are interesting for environmental remediation. In this work we experimentally study the Co sorption in a natural Na-MMT using UV-visible spectrometry and XRD on semi-oriented samples, and then analyze the sorption ability of this clay by means of ab initio calculation performed on pristine MMT. The structural properties of Na-MMT and Co-adsorbed MMT, and the hyperfine parameters at different atomic sites were analyzed and compared with the experimental ones for the first, and for the case of the hyperfine parameters, presented for the first time for the last. The theoretical predictions based on total energy considerations confirm that Co incorporation replacing Na is energetically favorable. Also, the basal spacing d experimentally obtained is well reproduced. Facultad de Ciencias Exactas Instituto de Física La Plata Facultad de Ingeniería |
| Databáze: | OpenAIRE |
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