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Yan Jin¹, Xinxin Zhao¹, Juan M Lema²

¹College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

Environmental science & technology

|March 13, 2026

概括

可生物降解塑料 (BPs) 在无氧条件下可以分解成持久的微塑料. 聚合物化学决定了BP是否完全降解或成为废物和自然环境中的微塑料来源.

科学领域:

环境科学环境科学
聚合物科学聚合物科学
微塑料研究微塑料研究

背景情况:

可生物降解塑料 (BPs) 正在取代传统的塑料.
它们在无氧环境中的降解和微塑料的产生尚未得到充分了解.
缺乏将BP衍生微塑料 (BPM) 从污泥中分离的方法,阻碍了研究.

研究的目的:

开发准确的,聚合物特定的方法,用于BPM分离和识别.
在八种常见的BP的无氧降解过程中调查微塑料的产生.
确定聚合物化学对无氧降解途径和结果的影响.

主要方法:

开发并验证了BPM的聚合物特定分离和识别技术.
大多数BPM的恢复率达到了>94.9%.
在中性无氧降解过程中分析了微塑料的生成,转化和分子进化.

主要成果:

基于聚合物结构观察到明显的降解途径.
PHB,PHBV和CDA与短暂的微塑料具有很高的生物降解性 (79.1-87.1%).
PBSA和PLA产生了具有低生物降解率 (27.3%,19.5%) 的持久性微塑料.
聚乙烯分裂很大;PBAT和PCL产生了有限的小型微塑料 (<300微米),没有显著的甲基生成.

结论:

聚合物化学是确定BP是否完全降解或无氧形成持久性微塑料的关键.
几个经过认证的BP可以在无氧环境中成为显著的微塑料来源.
这些发现对于废物管理和了解自然环境中的微塑料命运至关重要.

关键词:

无氧生物降解无氧生物降解厌氧环境厌氧环境可生物降解的塑料塑料微塑料的命运微塑料的命运形成微塑料的形成.

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