1 College of Global Change and Earth System Science, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China; 2. Chinese Academy of Environmental Planning, Beijing 100012, China; 3. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Abstract：The environmental impact and carbon footprint of passivation remediation technology for polluted farmland in Nujiang Prefecture, Yunnan Province, were quantified using the life cycle assessment method. The results showed that the environmental impacts of passivation remediation technology were finally classified into human health, ecosystems, and resources, with global warming impact being the main environmental impact. In the entire passivation remediation process, the chemical production stage and the project implementation stage were the hot spots of carbon emissions, with carbon emissions of 2103and 2091t, respectively. Carbon emission per unit cubic meter of contaminated soil remediation was 87.80kg. The environmental impact single score of passivation remediation technology was 949.94kPt, suggesting low environmental impact. This paper quantitatively evaluated the environmental impact score and carbon emissions of farmland pollution passivation remediation technology to provide a data basis for comparing the environmental impact of different remediation technologies and to promote green and sustainable remediation development of farmland contaminated site.
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