Particle size and concentration of poly(ɛ-caprolactone) and adipate modified starch blend on mineralization in soils with differing textures
ARTIGO
Inglês
The objective of this study was to evaluate the effect of particle size and concentration of poly(ɛ-caprolactone) and adipate modified starch blend on mineralization in soils with differing textures, comparing it with polyethylene under the same experimental conditions. Two soil types were used: a...
The objective of this study was to evaluate the effect of particle size and concentration of poly(ɛ-caprolactone) and adipate modified starch blend on mineralization in soils with differing textures, comparing it with polyethylene under the same experimental conditions. Two soil types were used: a Kandiudalfic Eutrudox with a clayey texture and an Arenic Hapludult with a sandy texture. The two different plastic specimens were incorporated in the form of plastic films with three increasing particle sizes and six doses, from 0 to 2.5 mg C g−1 soil. Each plastic dose was incorporated into 200 g of soil placed in a hermetically closed jar at 28 °C, and incubated for a 120-day period to determine CO2 evolution. Once again it was confirmed that polyethylene is almost non-biodegradable, in contrast to PCL/S, which can be defined as a biodegradable material. Soil texture affected the mineralization kinetics of the plastic specimens, with higher values for the clayey soil. No changes in soil microbial biomass-C or -N were observed by adding polyethylene and PCL/S to the soil. Also, no significant differences were observed on seed emergence and development of rice seedlings (Oryza sativa L.) in plastic modified soil
Fechado
Particle size and concentration of poly(ɛ-caprolactone) and adipate modified starch blend on mineralization in soils with differing textures
Particle size and concentration of poly(ɛ-caprolactone) and adipate modified starch blend on mineralization in soils with differing textures
Fontes
Polymer testing Vol. 28, no. 7 (2009), p. 680-687 |