| Full text | |
| Author(s): |
Valle, Stella F.
;
Giroto, Amanda S.
;
Klaic, Rodrigo
;
Bevilaqua, Denise
;
Ribeiro, Caue
Total Authors: 5
|
| Document type: | Journal article |
| Source: | JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 30, n. 11, p. 9-pg., 2022-07-23. |
| Abstract | |
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) | |
| FAPESP's process: | 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales |
| Grantee: | Roberto de Campos Giordano |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Thematic Grants |
| FAPESP's process: | 18/10104-1 - Nanocomposites Preparation from Urea modified with Glycerol for optimization of Process of Controlled Release of Nutrients |
| Grantee: | Amanda Soares Giroto |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 16/09343-6 - DEVELOPMENT AND AGRONOMIC EVALUATION OF A NEW FERTILIZER BASED ON NANOCOMPOSITES SULFUR-PHOSPHATE MINERAL |
| Grantee: | Gelton Geraldo Fernandes Guimarães |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |