Microwave-assisted acid treatment for the mineral transformation of chrysotile as an alternative for asbestos waste management.
Environ Geochem Health
; 46(9): 332, 2024 Jul 18.
Article
em En
| MEDLINE
| ID: mdl-39023801
ABSTRACT
In this work, the effect of microwave-assisted acid treatments on the morphological and crystallochemical characteristics of chrysotile fibers is investigated. A low concentration of nitric acid (0.2 N) is used to remove Mg2+-species located in the octahedral sheet of its structure, thereby causing a crystallo-chemical change forming a skeleton of non-crystalline amorphous silica. This skeleton maintains an elongated morphology but characterized by rounded -not sharp-edges and porous surfaces whose physical resistance under stress is reduced when compared with the initial fibers of chrysotile, favoring a lower pathogenicity of the fibers. Thus, microwave-assisted acid treatment rise as a low-cost, fast and effective option in avoiding the dangerousness associated with asbestos waste management.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Ácido Nítrico
/
Asbestos Serpentinas
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Micro-Ondas
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article