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经济可行性要求进口塑料废物的回收率高于预期

Kai Li¹, Hauke Ward², Hai Xiang Lin^2,3

¹Institute of Environmental Sciences (CML), Leiden University, Leiden, The Netherlands. k.li@cml.leidenuniv.nl.

Nature communications

|August 31, 2024

概括

进口塑料垃圾的财务收支平衡点需要最低回收率 (RRR) 为63%,远高于当前的国内回收率. 这凸显了全球贸易中回收塑料数量的潜在低估.

科学领域:

环境科学环境科学
废物管理废物管理
循环经济是一个循环经济.

背景情况:

塑料废物贸易对环境的影响是复杂的,并且严重依赖于处理方法.
目前的研究经常使用不准确的进口塑料废物的回收率,没有考虑到经济因素和不同的可回收性.

研究的目的:

估计进口塑料废物的最低必要回收率 (RRR),以使其经济可行.
分析影响主要进口国家的塑料废物贸易和回收利用的经济因素.

主要方法:

对进口价格,回收成本和回收塑料价值进行分析.
对22个主要进口国家和四种塑料废物类型 (2013-2022) 的财务平衡RRR估计.

主要成果:

进口塑料废弃物至少需要63%的RRR才能在经济上实现平衡.
这一要求的RRR比国内平均回收率高40个百分点 (23%).

结论:

要求和实际国内回收率之间的巨大差距表明,北南贸易中回收塑料数量被低估了.
具体的国家RRR可以改善研究和政策,以减轻塑料废物贸易对环境的影响.

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