Enzyme-embedded polyesters degrade faster in deep sea environments
Researchers have developed enzyme-embedded polyesters that significantly accelerate the breakdown of compostable plastics in coastal waters and at depths reaching 5,503 meters.
Deep sea degradation success
Films containing trace amounts of enzyme underwent rapid degradation in coastal seawater. Near-complete breakdown occurred at a depth of 757 meters within five months. Moderate biodegradation was also observed on the deep-sea floor at 5,503 meters.
Material properties remain stable
The mechanical properties of these enzyme-embedded polyesters matched those of standard enzyme-free versions. Chemical analysis confirmed the formation of low-molecular-mass degradation products during the process. Biochemical oxygen demand measurements supported the mineralization of the materials.
Targeting ocean pollution
This strategy addresses the accumulation of persistent plastics causing wide-ranging environmental problems in the ocean. The method works for various commercially available compostable plastic types including PBS and PCL. Embedding enzymes allows enhanced marine degradation where industrial composting conditions are absent.
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