Szczegóły publikacji
Opis bibliograficzny
Spectroscopic studies of heavy metal cations influence on the structure of synthetic hydrated calcium aluminosilicates / M. KRÓL, P. FLOREK, K. Dziża, W. MOZGAWA // Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy ; ISSN 1386-1425. — 2023 — vol. 294 art. no. 122559, s. 1–10. — Bibliogr. s. 9–10, Abstr. — Publikacja dostępna online od: 2023-02-28
Autorzy (4)
- AGHKról Magdalena
- AGHFlorek Paulina
- Dziża Katarzyna
- AGHMozgawa Włodzimierz
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 146122 |
|---|---|
| Data dodania do BaDAP | 2023-04-05 |
| DOI | 10.1016/j.saa.2023.122559 |
| Rok publikacji | 2023 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Spectrochimica Acta, Part A, Molecular and Biomolecular Spectroscopy |
Abstract
Calcium aluminosilicate hydrates (C-(A)-S-H) with two different C/S molar ratios of 1.0 and 1.7 were synthesized by precipitation with the use of the alkali-activation method. The samples were synthesized with solutions of heavy metals nitrates such as nickel (Ni), chromium (Cr), cobalt (Co), lead (Pb), and zinc (Zn). Metal cations were added in the amount of Ca:Me equal to 9:1, while Al/Si was 0.05. The influence of the addition of heavy metal cations on the structure of the C-(A-)S-H phase was investigated. For this purpose, XRD was used to examine the phase composition of the samples, FT-IR and Raman spectroscopy were used to determine the effect of heavy metal cations on the structure of the obtained C-(A)-S-H phase and their degree of polymerization. Using SEM and TEM, changes in the morphology of the obtained materials were determined. Possible mechanisms of immobilization of heavy metal cations have been determined. It was found that some heavy metals (Ni, Zn, and Cr) could be immobilized by precipitation of insoluble compounds. On the other hand, they could remove Ca2+ ions from the structure of aluminosilicate and take their place, as evidenced by the crystallization of Ca(OH)2 in samples with the addition of Cd, but also Ni and Zn in small amounts. A third possibility is the incorporation of heavy metal cations at the silicon and/or aluminum tetrahedral sites, as is the case with Zn. © 2023 Elsevier B.V.
