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基于生命周期理论,运用碳足迹法对徐州市5种主要类型购物袋的碳足迹进行分析评估。结果表明:徐州市使用购物袋产生的碳排放总量每年约6.2万吨,其中,HDPE袋总量贡献率最高,约为46%,但单位碳足迹贡献率最低,仅为0.5%;限塑政策的有效实施以及对纸类和织物类购物袋生产过程碳足迹的严格控制具有明显的减排效果;购物袋的重复使用也具有明显的减排效果,LDPE袋、牛皮纸袋、非纺布袋和棉布袋需要分别重复使用3、6、14和183次,其碳足迹才可能小于或等于HDPE袋;在购物袋生命周期各个阶段里,原料萃取和最终处置阶段碳足迹最大,而生产制造与运输阶段碳足迹较小,能源利用效率和碳排系数对碳足迹大小也有影响;购物袋碳足迹在空间分布上具有较大变异,泉山区最高,贾汪区最低,人口数量对购物袋碳足迹的影响受到城市化水平的制约。
Based on the life cycle theory, the carbon footprint of five main types of shopping bags in Xuzhou City was analyzed and evaluated by carbon footprint method. The results show that the total amount of carbon emissions produced by shopping bags in Xuzhou City is 62,000 tons per year, of which the total contribution rate of HDPE bags is the highest, about 46%, but the lowest contribution rate of unit carbon footprint is only 0.5% Effective implementation of policies and strict control over the carbon footprint of paper and fabric shopping bags in the production process have significant emission reduction effects; the repeated use of shopping bags also has significant emission reduction effects. LDPE bags, kraft paper bags, non-woven bags and Cotton bags need to be reused 3, 6, 14 and 183 times, respectively, and their carbon footprint may be less than or equal to the HDPE bags; in the various stages of the life cycle of the shopping bag, the carbon footprint of the raw material extraction and final disposal stage is the largest while the manufacturing and transportation Carbon footprint of the stage is small, energy efficiency and carbon footprint coefficient also have an impact on the size of carbon footprint; shopping bag carbon footprint has greater variation in the spatial distribution, the highest in Quan Mountain, Jia Wang minimum, the population of the shopping bag carbon footprint Affected by the level of urbanization constraints.