聚乳酸
降级(电信)
微塑料
生物降解
环境化学
湿度
聚丙烯
污染
微生物降解
环境科学
溶解有机碳
材料科学
聚合物
化学
复合材料
生态学
有机化学
微生物
遗传学
物理
细菌
热力学
计算机科学
生物
电信
作者
Lingling Hu,He Li,Li Cai,Yumeng Wang,Gang Wu,Daoyong Zhang,Xiangliang Pan,Yu‐Zhong Wang
标识
DOI:10.1016/j.jhazmat.2023.133170
摘要
More single-use plastics are accumulating in the environment, and likewise biodegradable plastics (BPs), which are being vigorously promoted, cannot escape the fate. Currently, studies on the actual degradation of BPs in open-air and freshwaters are underrepresented despite they are potentially headmost leakage and contamination sites for disposable BPs. Herein, we compared the degradation behavior of six BP materials and non-degradable polypropylene (PP) plastics over a 1-year in situ suspension in the high-humidity air, a eutrophic river, and an oligotrophic lake. Moreover, a 3-months laboratory incubation was performed to detect the release of dissolved organic carbon (DOC) from BPs. In both air and freshwaters, poly(p-dioxanone) (PPDO) degraded significantly while PP and polylactic acid (PLA) showed no signs of degradation. The average degradation rates of three poly(butylene adipate-co-terephthalate) (PBAT)-based films varied: 100% in river, 55% in lake, and 10% in air. In addition to PLA, surface chemical groups, hydrophilicity, and thermal stability of BPs changed, and microplastics were found on their surfaces. Correspondingly, BPs with faster degradation rates released relatively higher amounts of DOC. Environmental microbial and chemical characteristics may contribute to differences in BP degradation besides polymer specificity. Altogether, our results indicate the need for appropriate monitoring of BPs.
科研通智能强力驱动
Strongly Powered by AbleSci AI