生物降解
生物膜
聚合物
微生物降解
降级(电信)
作文(语言)
环境科学
化学
环境化学
有机化学
微生物
地质学
工程类
哲学
古生物学
电信
语言学
细菌
作者
Alice Delacuvellerie,Samira Benali,Valentine Cyriaque,Sébastien Moins,Jean‐Marie Raquez,Sylvie Gobert,Ruddy Wattiez
标识
DOI:10.1016/j.jhazmat.2021.126526
摘要
Different plastic types considered as compostable are found on the market such as petro-based ( e.g., polybutylene adipate terephthalate (PBAT)) or bio-based plastics ( e.g ., polylactic acid , (PLA)). Even if their degradation has been confirmed in industrial compost conditions, investigation of their degradation in natural marine environment has been limited. To better understand biodegradation into natural marine environment, commercial compostable (PBAT, semi-crystalline and amorphous PLA) and non-compostable polymers (low density polyethylene, polystyrene , polyethylene terephthalate , polyvinyl chloride) were submerged in situ on the sediment and in the water column in the Mediterranean Sea. These samples were studied by chemical and microbiological approaches. After 82 days of immersion, no significant bacterial degradation of the different polymers was observed, except some abiotic alterations of PBAT and LDPE probably due to a photooxidation process. However, after 80 days in an enrichment culture containing plastic films as a main carbon source, Marinomonas genus was specifically selected on the PBAT and a weight loss of 12% was highlighted. A better understanding of the bacterial community colonizing these plastics is essential for an eco-design of new biodegradable polymers to allow a rapid degradation in aquatic environment . • The sample position in the water column influences the abiotic degradation and the bacterial community. • The composition of plastic-associated microbial communities is not plastic nature dependent. • Plastics are mainly used as a support for the bacterial community. • Marinomonas genus was selected on polybutylene adipate terephthalate after enrichment culture. • The eco-design of new polymers with optimized properties is essential to improve the plastic biodegradation in environments.
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