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Asbestos cement waste treatment through mechanochemical process with KH2PO4 for its utilization in soil pH correction and nutrient delivery

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Autor(es):
Borges, Roger ; Giroto, Amanda S. ; Guimaraes, Gelton G. F. ; Reis, Heitor P. G. ; Farinas, Cristiane S. ; Ribeiro, Caue
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: Environmental Science and Pollution Research; v. 29, n. 19, p. 12-pg., 2022-01-06.
Resumo

The manufacture of asbestos materials has been banished worldwide due to their toxicity, but discarding the existing wastes remains a challenge. We investigated an alternative mechanochemical method to treat asbestos-cement materials by loading them with potassium and phosphorus from KH2PO4 during the milling process to obtain a product used as liming and soil conditioner. The results showed total asbestos fibrous elimination after 7 to 8 h of milling. The materials showed a slow-release fertilizer profile. The liming property is maintained when the asbestos-cement weight proportion used is equal to or higher than KH2PO4. A comparative soil experiment with limestone also indicates that lower doses of the K- and P-enriched detoxified asbestos cement were required to reach similar liming effects. Maize cultivation (greenhouse) was used to evaluate its performance showing higher biomass production for the sample loaded with potassium and phosphorous. (AU)

Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
Beneficiário:Roberto de Campos Giordano
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático
Processo FAPESP: 18/10104-1 - Preparação de Nanocompósitos a partir de Ureia modificada com Glicerol para otimização do Processo de Liberação Controlada de Nutrientes
Beneficiário:Amanda Soares Giroto
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado