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在模拟的工业堆肥条件下,商业可生物降解塑料制品的分解

Sevil V Afshar¹, Alessio Boldrin^2,3, Thomas H Christensen²

¹Department of Environmental and Resource Engineering, Technical University of Denmark, Bygningstorvet Building 115, 2800, Kgs. Lyngby, Denmark. sevaf@dtu.dk.

Scientific reports

|March 13, 2025

概括

这项研究在工业堆肥条件下测试了10种生物降解塑料产品. 虽然大多数分解,但两个释放了微塑料,凸显了对可持续塑料替代品的担忧.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
聚合物科学聚合物科学

背景情况:

可生物降解塑料被宣传为可持续的替代品,但其在现实世界中降解,特别是在商业产品中,尚未完全理解.
关于可生物降解塑料在合成产品时的分解和潜在的环境影响,存在知识差距.

研究的目的:

在模拟的工业堆肥条件下调查10种商业可生物降解塑料产品的分解.
评估这些产品在堆肥过程中释放的微塑料的可能性.

主要方法:

10种商业可生物降解塑料产品 (PLA,PBAT/粉,PHA) 在58°C和55%的湿度下进行了90天的分解试验 (ISO 20200).
在分解试验后,使用光显微镜检查堆肥颗粒 (<2毫米) 检查微塑料 (MP).

主要成果:

分解程度在75%至100%之间,其中五种产品完全分解.
在十种测试的可生物降解塑料产品中,有两种在堆肥底层检测到微塑料.
对于作为对照使用的传统塑料,没有检测到微塑料.

结论:

虽然许多可生物降解的塑料在工业堆肥条件下可以分解,但有些塑料仍可能导致微塑料污染.
需要进一步的研究来开发有效的方法来从堆肥基质中提取可生物降解的微塑料,以准确评估环境风险.

关键词:

生物塑料的生物塑料可复合性可复合性可降解性可降解性解体解体解体解体根据ISO 20200的规定,微塑料是微塑料中的一种.

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