典型污染场地风险管控技术的全生命周期碳足迹核算与评价

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摘要以华南地区某典型重金属污染场地为案例,采用排放因子法和生命周期影响评价法,对固化/稳定化+阻隔回填技术的全生命周期碳足迹进行核算与量化评估.结果表明,固化/稳定化+阻隔回填的碳排放强度为0.190t CO₂/m³污染土.主处理、场地建造和阻隔回填是最主要的碳排放单元过程,分别占总碳排放的33.7%、32.7%和31.9%;关键碳排放来源为混凝土和固化/稳定化药剂的生产,分别占总碳排放的51.9%和33.4%.本案例综合环境影响评分为84.3kPt,风险管控实施过程对人体健康的影响最大,主要的贡献因素是工程施工造成的细颗粒形成和全球变暖.

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	张静宇
	周玲莉
	周静妍
	吴文成
	吴颖欣

关键词 ：固化/稳定化, 阻隔回填, 全生命周期, 碳足迹

Abstract：This study conducted a comprehensive life cycle assessment of the carbon footprint associated with the solidification/stabilization combined with barrier backfilling (SSB) technology through a typical heavy metal-contaminated site case in South China. Using the emission factor method and life cycle impact assessment approach, we quantified the environmental impacts across the entire remediation process. The results revealed that the SSB technology exhibited a carbon emission intensity of 0.190t CO2/m3 contaminated soil. The most important carbon emission unit processes were primary treatment (33.7%), site construction (32.7%), and barrier backfilling (31.9%). Material production emerged as the principal emission source, with concrete manufacturing contributing 51.9% and solidification/stabilization reagents accounting for 33.4% of total emissions. The comprehensive environmental impact score of this case reached 84.3kPt. The implementation process of risk control exerted the most significant human health impacts, which were primarily contributed by the formation of fine particulate matter during construction activities and the global warming potential.

Key words： solidification/stabilization barrier backfill life cycle assessment carbon footprint

收稿日期: 2024-09-30

PACS:

X53

基金资助:国家重点研发计划项目(2022YFC3703302)

作者简介: 张静宇(2000-),女,河南安阳人,安徽大学硕士研究生,主要从事污染场地绿色可持续修复研究.Zhang_jing_yu_zjy@163.com.

引用本文:

张静宇, 周玲莉, 周静妍, 吴文成, 吴颖欣. 典型污染场地风险管控技术的全生命周期碳足迹核算与评价[J]. 中国环境科学, 2025, 45(5): 2932-2940. ZHANG Jing-yu, ZHOU Ling-li, ZHOU Jing-yan, WU Wen-cheng, WU Ying-xin. Life cycle carbon footprint accounting and assessment of risk management and control technologies of typical contaminated sites. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(5): 2932-2940.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2025/V45/I5/2932

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