Comparative Biodegradation in Soil Behaviour of two Biodegradable Polymers Based on Renewable Resources |
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Authors: | E Rudnik D Briassoulis |
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Institution: | (1) Department of Agricultural Engineering, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece;(2) Present address: Industrial Chemistry Research Institute, Rydygiera 8, 01-793 Warsaw, Poland |
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Abstract: | This work presents the last phase of long-term experimental studies on the biodegradation in soil behaviour of polymers destined
for agricultural applications. The paper focuses on comparative studies between the biodegradation in soil behaviour of two
important biodegradable polymers based on renewable resources: poly(lactic acid) (PLA) versus polyhydroxyalkanoates (PHA).
Full-scale experiments were carried out during the period June 2008–January 2009. Different methods of exposure were applied
in the case of polyhydroxyalkanoates, simulating the agricultural biodegradable mulching films use and their fate in soil
after the end of their useful lifetime. The field results were compared with the results of biodegradation under controlled
laboratory conditions simulating biodegradation in soil, using soil from the experimental field. Further, the field results
were compared against the results of biodegradation under farm composting conditions. |
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