Comparison of the biodegradability of various polyethylene films containing pro-oxidant additives
| Autor: | Jean-Michel Brusson, Marek Koutny, Jean-Paul Courdavault, Guy Samuel, Jacques Lemaire, S. Bonhomme, Stéphane Fontanella, Anne-Marie Delort, Silvio Pitteri, Gérard Pichon, Lucie Husárová |
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| Přispěvatelé: | Synthèse et étude de systèmes à intêret biologique (SEESIB), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), CNEP, Department of Environmental Protection Engineering, Tomas Bata University in Zlin (UTB), Total Petrochemicals Research, TOTAL FINA ELF, LyondellBasell, Basell Poliolefine, Association NEOSAC, Groupe Extrusion Soufflage de Ste Sigolene, Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Tomas Bata University in Zlin |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Thermal oxidation
Materials science Polymers and Plastics Inorganic chemistry chemistry.chemical_element Pro-oxidant 02 engineering and technology 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Materials Chemistry Photooxidation 0105 earth and related environmental sciences chemistry.chemical_classification biology Polymer Rhodococcus rhodochrous Biodegradation Polyethylene 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification Linear low-density polyethylene Low-density polyethylene chemistry 13. Climate action Mechanics of Materials High-density polyethylene 0210 nano-technology Cobalt Nuclear chemistry |
| Zdroj: | Polymer Degradation and Stability Polymer Degradation and Stability, 2010, 95, pp.1011-1021 Polymer Degradation and Stability, Elsevier, 2010, 95, pp.1011-1021 |
| ISSN: | 0141-3910 1873-2321 |
| Popis: | International audience; The biodegradability of high density polyethylene films (HDPE), low density polyethylene films (LDPE) and linear low density polyethylene films (LLDPE) with a balanced content of antioxidants and pro-oxidants (manganese + iron or manganese + iron + cobalt) was studied. Abiotic pre-treatment consisting of photooxidation and thermal oxidation corresponding to about three years of outdoor weathering (including 3–4 months of exposure to daylight) was monitored by FTIR and SEC measurements. The oxidized samples were then inoculated with the strain Rhodococcus rhodochrous in mineral medium, and incubated up to 180 days. The metabolic activity of the bacteria was assessed by measuring adenosine triphosphate content (ATP) and the viability of the cells. Complementary experiments were performed by 1H NMR spectroscopy to monitor the biodegradation of soluble molecules excreted from the polymer in the incubation medium. Finally SEM was used to visualize the formation of a biofilm at the surface of the polymer. Three samples among the 12 tested were investigated in compost and soil environments. The results show that the main factor controlling the biodegradability of the polyethylene films is the nature of the pro-oxidant additive and to a lesser extent that of the matrix. Except for the samples containing very high content of cobalt additive, the various polymer films were used as substrates by the bacteria. |
| Databáze: | OpenAIRE |
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