基于SEFA方法的异位土壤修复环境足迹分析——以某钢铁厂为例

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Abstract A study was conducted to analyze environmental footprints of heterotopic combination remediation schemes using SEFA (Spreadsheets for Environmental Footprint Analysis, EPA, version 3.0) algorithm at a steel contaminated site in Hefei, Anhui Province. Three schemes were included:(1) soil leaching + chemical oxidation + co-combustion in cement kiln, (2) stabilization + chemical oxidation + thermal desorption + remote landfill, (3) biodegradation + stabilization. Results showed significant differences in environmental footprints among the three remediation schemes. In terms of the green and sustainable restoration (GSR) elements, Scheme 3 yielded the smallest environmental footprint, i.e., energy consumption of 21808×10⁴MJ and air pollution of 17,300tCO₂ e. The overall environmental footprint of remediation of 1m³ of organic contaminated soil followed an order of chemical oxidation < biodegradation < thermal desorption, showing greenhouse gas emission as 0.05, 0.09 and 0.17tCO₂ e/m³, and energy consumption as 949.55, 1677.54, 3049.11MJ/m³, respectively. For remediation of heavy metal contaminated soil, landfill caused the smallest environmental footprint in terms of energy consumption and greenhouse gases emissions. Regarding air pollutant emissions, stabilization remediation technology led to the smallest environmental footprint.

Key words： Soil remediation chemical oxidation biodegradation environmental footprint analysis

Received: 27 February 2023

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X703.5

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	Articles by authors
	SANG Chun-hui
	YANG Xin-tong
	LI Xiang-lan
	ZHANG Hong-zhen

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SANG Chun-hui,YANG Xin-tong,LI Xiang-lan等. Environmental footprint analysis of ectopic soil remediation based on SEFA method: A case study of a steel plant[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5359-5367.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I10/5359

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