光老化
微塑料
化学
机制(生物学)
环境化学
光化学
哲学
遗传学
认识论
生物
作者
Xi Chen,Yiying Yue,Zihan Wang,Jian Sun,Shuying Dong
标识
DOI:10.1016/j.scitotenv.2024.171756
摘要
The degradation of biodegradable plastics (BPs) in natural environments is constrained, and the mechanisms underlying their photoaging in aquatic settings remain inadequately understood. In view of this, this study systematically investigated the photoaging process of biodegradable Poly (butyleneadipate-co-terephthalate) microplastics (PBAT-MPs), which are more widely used. The investigation was carried out in the presence of common inorganic anions (Br−, Cl− and NO3−). The results of EPR, FTIR and FESEM tests, along with pseudo-first-order kinetics analyses, showed that the presence of NO3− promoted the photoaging of PBAT-MPs, while the presence of Br− and Cl− inhibited the photoaging of PBAT-MPs. In addition, the results of the Two-Dimensional Correlation Spectroscopy (2D-COS) analysis determined the order of the changes in the functional groups, revealing that the Norrish I and Norrish II reaction mechanisms are presented by PBAT-MPs during the aging process, and the process is closely related to the ion concentration and UV irradiation time. This study provides valuable insights for understanding the phototransformation process of BPs in natural aqueous environments.
科研通智能强力驱动
Strongly Powered by AbleSci AI