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评估从一个不太可能的来源产生微塑料:当前塑料回收工艺的意外后果

Michael J Stapleton¹, Ashley J Ansari¹, Aziz Ahmed²

¹Strategic Water Infrastructure Laboratory, School of Civil, Mining, Environmental and Architectural Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.

The Science of the total environment

|August 8, 2023

概括

塑料回收工艺,特别是切碎,产生了大量的微塑料污染. 材料类型和气候条件极大地影响了微塑料的生产率,突出了一个主要的环境问题.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

在废水和塑料回收设施的污泥中越来越多地检测到微塑料.
在回收过程中产生微塑料的特定途径,影响因素和缓解策略仍然未得到充分研究.

研究的目的:

确定影响塑料回收过程中产生微塑料的关键因素.
调查塑料类型和环境气候对微塑料形成的影响.

主要方法:

机械破碎被用来模拟塑料回收中的缩小尺寸阶段.
对于不同类型的塑料 (PC,PET,PP,HDPE) 和气候条件,量化了微塑料的产生率.
颗粒分析的重点是0.212-1.18毫米的颗粒大小.

主要成果:

机械破碎是回收过程中产生微塑料的主要来源.
塑料材料类型显著影响微塑料生成率,与材料硬度相关 (R2 = 0.88).
六个月的环境气候变化在所有测试的塑料中大幅增加了微塑料生成率.

结论:

塑料回收操作是微塑料污染的重要,但经常被忽视的来源.
了解材料特性和气候变化的影响对于开发有效的微塑料减少策略至关重要.
实施减少微塑料生产和管理废水/污泥的措施对于减轻循环过程造成的环境污染至关重要.

关键词:

污染污染污染污染机械破碎机械破碎机械破碎机械破碎机械破碎机械破碎机械破碎机械微塑料的污染微塑料的污染塑料废弃物塑料废弃物回收回收是回收的过程.

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