| Texto completo | |
| Autor(es): |
Valle, Stella F.
;
Giroto, Amanda S.
;
Klaic, Rodrigo
;
Bevilaqua, Denise
;
Ribeiro, Caue
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 30, n. 11, p. 9-pg., 2022-07-23. |
| Resumo | |
Sulfur (S) fertilization is necessary to overcome the low availability of this essential nutrient in agricultural soils. Although elemental sulfur (S-8) pellets are often used, they tend to be poorly effective due to their low oxidation rate to sulfate, the form assimilated by plants. Here we designed highly porous polysulfide pellets (PolyS-porous) as S fertilizers with higher surface area for oxidation, aiming to improve sulfate delivery. A porosity of nearly 50% was achieved via inverse vulcanization of soybean oil and S-8 in the presence of a salt porogen. A culture medium test with S-oxidizing bacterium Acidithiobacillus thiooxidans revealed PolyS-porous had a faster initial oxidation than S-8-pellet, reaching respectively 57% and 20% at the end of 10 days. Sulfate released from PolyS-porous in soil was 3 times higher than from S-8-pellet in 30 days, and PolyS-porous co-application with A. thiooxidans achieved twice as much. Overall, the results from this study demonstrated the potential of porous polysulfide pellets as sulfur fertilizers with improved efficiency, especially when combined with A. thiooxidans. [GRAPHICS] . (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 |
| Processo FAPESP: | 16/09343-6 - Desenvolvimento e avaliação agronômica de um novo fertilizante baseado em nanocompósitos enxofre-fosfatos minerais |
| Beneficiário: | Gelton Geraldo Fernandes Guimarães |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |