Characterisation of potentially toxic natural fibrous zeolites by means of electron paramagnetic resonance spectroscopy and morphological-mineralogical studies
| Autor: | Paolo Ballirano, Maria Francesca Ottaviani, Valentina Scognamiglio, Alessandro F. Gualtieri, Michela Cangiotti, Miriam Hanuskova, Michele Mattioli, Matteo Giordani, Michele Betti, Alessandro Pacella, Dario Di Giuseppe, Alberto Fattori |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Electron paramagnetic resonance spectroscopy
Environmental Engineering Mineral fibres Erionite Mesolite Thomsonite Electron paramagnetic resonance Health hazard Health Toxicology and Mutagenesis Mesolite Analytical chemistry Erionite law.invention Health hazard chemistry.chemical_compound health hazard law Specific surface area Environmental Chemistry Humans Thomsonite Electron paramagnetic resonance Mineral fibres Mineral Chemistry electron paramagnetic resonance mineral fibres Public Health Environmental and Occupational Health Electron Spin Resonance Spectroscopy General Medicine General Chemistry Pollution Carcinogens Zeolites |
| Popis: | This study explored the morphological, mineralogical, and physico-chemical features of carcinogenic erionite and other possibly hazardous zeolites, such as mesolite and thomsonite, while also investigating the interacting capability of the mineral surface at the liquid/solid interface. Extremely fibrous erionite is K+ and Ca2+-rich and shows the highest Si/Al ratio (3.38) and specific surface area (8.14 m2/g). Fibrous mesolite is Na+ and Ca2+-rich and displays both a lower Si/Al ratio (1.56) and a smaller specific surface area (1.56 m2/g). The thomsonite composition shows the lowest values of Si/Al ratio (1.23) and specific surface area (0.38 m2/g). Electron paramagnetic resonance data from selected spin probes reveal that erionite has a homogeneous site distribution and interacts well with all spin probes. The surfaces of mesolite and thomsonite are less homogeneous and closer polar sites were found through consequent interaction with the probes. The mesolite surface can also clearly interact but with a lower strength and may represent a potential health hazard for humans, though with a lower degree if compared to erionite. The thomsonite surface is not inert and interacts with the probes with a low-grade capability. We can expect small fragments of thomsonite to interact with the biological environment, though with a low-grade intensity. |
| Databáze: | OpenAIRE |
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