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回收还是不回收? 在塑料加工过程中通过本地案例研究探索微塑料的产生

Fan Wei¹, Enjing Wei¹, Yuan Chen¹

¹State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.

Environmental science & technology

|November 21, 2024

概括

塑料加工产生了大量的微塑料 (MP). 这项研究强调塑料挤出是一种至关重要的,被低估的MP来源,建议改进去除技术,特别是对于初始塑料.

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:

微塑料 (MP) 污染是一个日益严重的全球问题.
研究重点是MP来源,但塑料加工仍未得到充分研究.
塑料加工对环境中的MP释放有很大的贡献.

研究的目的:

为了研究在处女塑料和废塑料挤出过程中产生微塑料.
确定影响塑料加工中MP形成的因素.
在工业环境中评估潜在的MP清除策略.

主要方法:

在新塑料和回收塑料的挤出过程中产生量化微塑料 (10μm-5mm).
分析了原料,聚合物类型和颗粒化方法对MP产量的影响.
使用现有技术模拟了微塑料清除效率.

主要成果:

处理 1 塑料产生了 2.13 × 10^59.79 × 10^7 MPs (0.0110.85 g) 的量.
原料,聚合物类型和颗粒化显著影响了MP的产生.
在2022年,塑料加工产生的全球MP产生量估计为1.34 × 10^162.63 × 10^16颗粒.
模拟显示高达84.35%的MP去除是可能的,对于较大的颗粒,效率更高.

结论:

塑料加工是微塑料污染的一个关键,被低估的来源.
处女塑料加工和水环颗粒化需要有针对性的MP检查和清除.
塑料回收产生更少和更大的MP,使其更容易去除,应该促进.

关键词:

冷却水冷却水的使用方法影响因素影响因素.微塑料微塑料的使用塑料加工塑料加工塑料加工废塑料回收废弃物塑料回收利用

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