Szczegóły publikacji
Opis bibliograficzny
Structural studies of calcium silicate hydrate modified with heavy metal cations / M. KRÓL, P. FLOREK, M. MARZEC, S. WÓJCIK, K. Dziża, W. MOZGAWA // Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy ; ISSN 1386-1425. — 2024 — vol. 321 art. no. 124681, s. 1–10. — Bibliogr. s. 9–10, Abstr. — Publikacja dostępna online od: 2024-06-19
Autorzy (6)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 154074 |
|---|---|
| Data dodania do BaDAP | 2024-07-10 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.saa.2024.124681 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Spectrochimica Acta, Part A, Molecular and Biomolecular Spectroscopy |
Abstract
This study investigates the immobilization mechanisms of heavy metal ions in the C-S-H phase. Synthetic C-S-H phases were prepared via the precipitation method, incorporating five different ions (Pb(II), Cd(II), Ni(II), Zn(II), and Cr(III)). Structural analysis of the obtained material was conducted using vibrational spectroscopy (both FT-IR and Raman), X-ray photoelectron spectroscopy, and X-ray diffraction. Spectroscopic methods were primarily employed to evaluate the structural effects and polymerization degree of the resulting C-S-H phase. Morphological changes were characterized using scanning and transmission electron microscopy (SEM and TEM, respectively). Our findings reveal several mechanisms for immobilizing heavy metal cations: precipitation of insoluble compounds (particularly notable for Ni(II) and Cr(III)), replacement of Ca(II) ions within the silicate structure (evident in the crystallization of Ca(OH)2 in samples containing Cd(II), Ni(II), and Zn(II) in minimal quantities), and strong bonding of certain metals (such as Pb(II)) with the C-S-H phase structure. These insights contribute to understanding the potential applications of C-S-H phases in heavy metal immobilization.
