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    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. © 2024. The Author(s).

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    Salima Essih, Laura Pardo, Juan Antonio Cecilia, Lucía Dos Santos-Gómez, Rosario M P Colodrero, Manuel Pozo, Gustavo Calero, Francisco Franco. Microwave-assisted acid treatment for the mineral transformation of chrysotile as an alternative for asbestos waste management. Environmental geochemistry and health. 2024 Jul 18;46(9):332

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    PMID: 39023801

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