A Mechanochemical Route to Magnesium/Calcium Citrate Formation for Chrysotile/Asbestos Cement Correct Disposal as Agricultural Input

Here, we propose a mechanochemical route to manage the disposal of asbestos fibers material from raw chrysotile and asbestos cement, using it as a nutrient source for agriculture. The mechanochemical process, using citric acid as a reactant, led to the fibers’ disruption. The constant mixing, the re...

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Bibliographic Details
Published in:Waste and biomass valorization 2023-07, Vol.14 (7), p.2389-2399
Main Authors: Borges, Roger, do Amaral, Lilian Fernanda Martins, Ribeiro, Vitória Palhares, de Oliveira- Paiva, Christiane Abreu, Wypych, Fernando, Ribeiro, Caue
Format: Article
Language:English
Subjects:
Acidic soils
Asbestos
Asbestos cement
Calcium
Calcium ions
Cement
Chrysotile
Citrates
Citric acid
Engineering
Environment
Environmental Engineering/Biotechnology
Fibers
Industrial Pollution Prevention
Ion migration
Limestone
Magnesium
Original Paper
Renewable and Green Energy
Soil chemistry
Soil pH
Soils
Waste Management/Waste Technology
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Summary:Here, we propose a mechanochemical route to manage the disposal of asbestos fibers material from raw chrysotile and asbestos cement, using it as a nutrient source for agriculture. The mechanochemical process, using citric acid as a reactant, led to the fibers’ disruption. The constant mixing, the reactants’ friction, and the ion migration enabled the formation of calcium/magnesium citrates. Through soil incubation and enzymatic profile analyses, we showed the beneficial effect of these products as readily available carbon to stimulate endogenous microbiota, releasing Ca 2+ /Mg 2+ to correct acid soil pH. The results evidence the potential of these citrates to promote an acidic buffer to the soil and, after their microbiological decomposition, their equivalent effect to commercial limestone for soil pH correction. Graphical Abstract
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-022-01994-5