映射聚氨的流量,库存,塑料排放和温室气体排放:解码挑战和污染预防途径在中国
Yunhan Cui1, Jiayu Wang2,3, Guobao Song1
1Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Environmental science & technology
|April 23, 2025
概括
全球对聚氨 (PU) 的需求正在上升. 这项研究追踪了中国的PU循环,揭示了生产和废弃物热点,并提出了减缓战略,以减少塑料和温室气体排放.
科学领域:
- 环境科学 环境科学
- 材料流量分析 材料流量分析
- 工业生态学 工业生态学
背景情况:
- 全球对聚氨 (PU) 的需求正在增加,但它们对环境的影响,包括温室气体 (GHG) 排放和废物产生,尚未完全理解.
- 中国在全球PU市场的重要份额 (2022年为45%) 需要对其PU生命周期进行详细分析.
研究的目的:
- 从1958年到2022年,量化与中国的PU相关的人为循环和温室气体排放.
- 确定为PU生产,使用库存,废物产生和微塑料排放做出贡献的关键部门.
- 评估缓解策略的潜力,以减少与PU相关的环境污染.
主要方法:
- 动态材料流分析被用来跟踪中国的PU生命周期.
- 使用场景分析来评估减排干预措施的有效性.
- 收集和分析了生产量,使用库存,废物流和温室气体排放数据.
主要成果:
- 中国的PU产量从2000年到2022年增长了11倍,使用中的库存达到9.09 × 1010公斤.
- 建筑行业占了使用中的PU库存的30%以上,而织品,服装和鞋类则产生了41.4%的PU废物.
- 微塑料占PU塑料排放量的65.5%,主要在土壤中;PU泡生产是温室气体排放的最大来源 (2022年1.88×10kgCO2e).
结论:
- 在PU生命周期中进行有针对性的干预可以显著减少塑料和温室气体排放.
- 结合的减排策略可以在2060年之前将PU塑料排放量减少30%以上,温室气体排放量减少15%以上.
- 该研究为可持续的PU行业发展和解决全球塑料危机提供了关键数据.
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