中国塑料 ›› 2025, Vol. 39 ›› Issue (12): 107-113.DOI: 10.19491/j.issn.1001-9278.2025.12.017

• 塑料与环境 • 上一篇    

再生塑料环境足迹量化及其在餐盒行业的应用案例研究

唐君兰1, 李斌1(), 毛安琪2, 杨勇2   

  1. 1.东华大学先进纤维材料全国重点实验室,上海 201620
    2.中石化(北京)化工研究院有限公司,北京 100013
  • 收稿日期:2025-01-26 出版日期:2025-12-26 发布日期:2025-12-22
  • 通讯作者: 李斌,男,高级研究员,从事碳资产管理、再生塑料高值化利用研究,bli@dhu.edu.cn
    E-mail:bli@dhu.edu.cn

A case study on quantifying the environmental footprint of recycled plastics: application in lunch box industry

TANG Junlan1, LI Bin1(), Mao Anqi2, YANG Yong2   

  1. 1.State Key Laboratory of Advanced Fiber Materials,Donghua University,Shanghai 201620,China
    2.Sinopec (Beijing) Research Institute of Chemical Industry Co,Ltd,Beijing 100013,China
  • Received:2025-01-26 Online:2025-12-26 Published:2025-12-22
  • Contact: LI Bin E-mail:bli@dhu.edu.cn

摘要:

利用生命周期评价(LCA)耦合循环足迹公式(CFF)量化特定再生塑料在餐盒行业的环境足迹,并评估其环境效益。结果表明,从废弃餐盒回收到聚丙烯(PP)粒子再生全过程中引起的全球变暖潜能(GWP)、非生物性化石能源消耗(ADFf)、人体毒性(HTP)、臭氧层损耗(ODP)、酸化潜能(AP)、富营养化潜能(EP)分别为1.837 kg CO2eq、39.766 MJ、4.218 kg 1,4⁃DB eq、3.275E⁃08 kg CFC⁃11 eq、0.006 kg SO2 eq、0.002 kg PO4eq,其中,各环境影响指标中原材料废弃餐盒的排放均占比最高,为84.0 %~94.9 %,电力排放贡献度为1.60 %~14.0 %;与原生PP加工相比,再生PP的GWP下降49.5 %,归一化结果表明GWP、ADFf、HTP的排放加和在情景A和情景B中分别占总体环境负荷的85.2 %、88.1 %;敏感性分析显示,不同的环境负荷分配方法对再生塑料的环境影响评估结果有显著影响;截止分配方法下,再利用产品的环境影响最低,而50/50分配法可能导致对二次利用产品的环境影响高估。

关键词: 再生塑料, 碳足迹, 餐盒回收, 生命周期评价, 敏感性分析

Abstract:

This study quantified the environmental footprint of recycled polypropylene (PP) used in lunch box production by applying a life cycle assessment framework integrated with the circular footprint formula. The assessment evaluated impacts including global warming potential (GWP), abiotic fossil resource depletion (ADPf), human toxicity potential (HTP), ozone depletion potential (ODP), acidification potential (AP), and eutrophication potential (EP). The results for the recycling process, from waste lunch boxes to regenerated PP particles, were determined as follows: 1.837 kg CO₂⁃eq (GWP), 39.766 MJ (ADPf), 4.218 kg 1,4⁃DB⁃eq (HTP), 3.275E⁃08 kg CFC⁃11⁃eq (ODP), 0.006 kg SO₂⁃eq (AP), and 0.002 kg PO₄⁃eq (EP). The initial waste lunch box collection was the dominant contributor, accounting for 84.0 % to 94.9 % of each impact category, while electricity consumption contributed 1.60 % to 14.0 %. Compared to virgin PP processing, the GWP of recycled PP was 49.5 % lower. Normalization analysis revealed that GWP, ADPf, and HTP together constituted 85.2 % and 88.1 % of the total environmental load in Scenarios A and B, respectively. Sensitivity analysis demonstrated that the choice of allocation method significantly influences the results. The cut⁃off allocation method yielded the lowest environmental impacts for the recycled product, whereas the 50/50 allocation method was found to potentially overestimate impacts for secondary materials.

Key words: recycled plastics, carbon footprint, lunch box recycling, life cycle assessment, sensitivity analysis

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