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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摘要在界定评估边界、细化数据清单和系统构建评估流程方法的基础上,采用国际上广泛应用的环境足迹分析计算工具Spreadsheets for Environmental Footprint Analysis(SEFA),以山东某氰化物污染地块为例,基于实际获取数据,进行环境足迹的定量评价.结果表明,修复工程污染土方量74948m³,材料消耗量2249t,固废产生量4.19t,水资源消耗量2714m³,废水产生量2481m³,能源消耗量4274万 MJ,温室气体(GHG)排放量为2463t CO₂-eq.原位化学氧化相对原地异位化学氧化的环境影响更小,去除每千克氰化物的能源效率和GHG排放强度分别为6415MJ/kg和339.11kg CO₂-eq/kg,约占异位化学氧化的25%.案例结果表明,SEFA能够快速、高效地定量评估氰化物污染修复工程的环境影响,上游原材料的使用导致的间接排放是环境足迹的主要来源,设备使用时长和材料用量是影响评估结果的关键参数.

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	桑春晖
	杨欣桐
	张红振
	肖萌
	刘瑞平
	孟藤藤
	李香兰

关键词 ：原位化学氧化, 异位化学氧化, 过硫酸钠, 绿色可持续修复, 碳排放

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

收稿日期: 2023-10-05

PACS:

X53

基金资助:国家重点研发计划项目(2019YFC1803900,2022YFC3703301, 2022YFC3703304)

通讯作者: 李香兰,副教授,xlli@bnu.edu.cn E-mail: xlli@bnu.edu.cn

作者简介: 桑春晖(2000-),女,山东济南人,硕士研究生,主要从事气候变化与污染场地绿色可持续修复研究.发表论文1篇.sangch@mail.bnu.edu.cn.

引用本文:

桑春晖, 杨欣桐, 张红振, 肖萌, 刘瑞平, 孟藤藤, 李香兰. 氰化物污染土壤修复工程环境足迹评估方法和案例研究[J]. 中国环境科学, 2024, 44(5): 2905-2915. SANG Chun-hui, YANG Xin-tong, ZHANG Hong-zhen, XIAO Meng, LIU Rui-ping, MENG Teng-teng, LI Xiang-lan. Environmental footprint assessment methods and case studies for cyanide-contaminated soil remediation projects. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(5): 2905-2915.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I5/2905

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