氰化物污染土壤修复工程环境足迹评估方法和案例研究

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Abstract Based on defining the evaluation boundary, refining the data list, and constructing a systematic evaluation process method, the internationally widely used Environmental Footprint Analysis and Calculation Tool (Spreadsheets for Environmental Footprint Analysis, SEFA) was used to quantitatively evaluate the environmental footprint of a cyanide contaminated site in Shandong Province. Results showed that the pollution volume of the restoration project was 74948m³, the material consumption was 2249t, the solid waste production was 4.19t, the water resource consumption was 2714m³, the wastewater production was 2481m³, the energy consumption was 42740000MJ, and the greenhouse gases (GHGs) emission was 2463t CO₂-eq. In situ chemical oxidation has less environmental impact than in situ ectopic chemical oxidation and the energy efficiency and GHG emission intensity of cyanide removal were 6415MJ/kg and 339.11kg CO₂-eq/kg, respectively, accounting for 25% of ectopic chemical oxidation. The study case results show that SEFA enables rapid and efficient quantitative assessment of the environmental impact of cyanide remediation projects. Indirect emissions from upstream raw material use are the main source of environmental footprint in the case, and the duration of equipment use and the amount of materials used are the key parameters influencing the assessment results.

Key words： in situ chemical oxidation ex-Situ Chemical Oxidation sodium persulfate green and sustainable restoration carbon emissions

Received: 05 October 2023

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	Articles by authors
	SANG Chun-hui
	YANG Xin-tong
	ZHANG Hong-zhen
	XIAO Meng
	LIU Rui-ping
	MENG Teng-teng
	LI Xiang-lan

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SANG Chun-hui,YANG Xin-tong,ZHANG Hong-zhen等. Environmental footprint assessment methods and case studies for cyanide-contaminated soil remediation projects[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(5): 2905-2915.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I5/2905

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