Kinetics of Aerobic Polymer Degradation in Soil by Means of the ASTM D 5988-96 Standard Method |
| |
Authors: | Alberto Modelli Barbara Calcagno Mariastella Scandola |
| |
Affiliation: | (1) Università di Bologna, Dipartimento di Chimica G. Ciamician,, via Selmi 2, 40126 Bologna, Italy;(2) Università di Bologna, Corso di Laurea in Scienze Ambientali, piazza Kennedy 12, 48100 Ravenna, Italy |
| |
Abstract: | The standard test method ASTM D 5988-96 for determining the degree and rate of aerobic biodegradation of plastic materials in contact with soil was applied to poly(3-hydroxybutyrate) and poly(-caprolactone). The method proved to be reliable and supplied reproducible measurements of CO2 production, provided potassium (instead of barium) hydroxide was used as a trapping solution. The trends of CO2 evolution, as a function of time, observed for the degradation of polymer powders in soil are similar to those predicted by simple first order kinetics in solution. The experimental data are described by a Michaelis–Menten type model, which accounts for the heterogeneity of the polymer-soil system. The kinetic equation deduced predicts the degradation rate to the proportional to the exposed polymer surface area. |
| |
Keywords: | Kinetics aerobic biodegradation poly-3-hydroxybutyrate poly- /content/m575310175l4qt13/xxlarge603.gif" alt=" epsiv" align=" BASELINE" BORDER=" 0" >-caprolactone ASTM D 5988-96 |
本文献已被 SpringerLink 等数据库收录! |
|