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Purpose <p>The environmental impacts of contaminated site remediation pose a growing challenge for urban renewal and brownfield redevelopment in the context of climate change. Yet, greenhouse gas (GHG) emissions from remediation at regional scale and their characteristics remain underexplored. This study integrated global data on GHG emission intensities of different remediation technologies and evaluated GHG emissions and their spatiotemporal dynamics associated with soil remediation activities.</p> Methods <p>GHG emission intensity data were collected from published life cycle assessment (LCA) studies and used to calculate emissions from remediated sites between 2006 and 2023. Emissions were calculated for each site, and their spatiotemporal dynamics were analyzed.</p> Results <p>Ex-situ remediation contributed about 74.5% more emissions than in-situ remediation and risk control. GHG emissions increased at an average rate of 9.33% from 2006 to 2023, showing four distinct phases: 2006–2010 (− 23.02%), 2010–2016 (39.84%), 2016–2019 (49.76%), and 2019–2023 (− 22.31%). The spatial pattern of emissions showed a southward shift from Beijing, forming a multi-centered distribution as urban development progressed. Sites previously used for manufacturing were the main sources of GHG emissions, primarily concentrated in Beijing and Tianjin.</p> Conclusion <p>GHG emissions increased significantly over the past 17 years and showed an uneven expansion trend. Industrial transfer, policy changes, and urban structure caused differences among subregions.</p>

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Assessing greenhouse gas emissions from contaminated site remediation: A spatiotemporal analysis of the Beijing-Tianjin-Hebei Region (2006–2023)

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • Yuxin Nie,
  • Xianglan Li,
  • Hongzhen Zhang,
  • Hao Meng,
  • Jingqi Dong,
  • Xintong Yang

摘要

Purpose

The environmental impacts of contaminated site remediation pose a growing challenge for urban renewal and brownfield redevelopment in the context of climate change. Yet, greenhouse gas (GHG) emissions from remediation at regional scale and their characteristics remain underexplored. This study integrated global data on GHG emission intensities of different remediation technologies and evaluated GHG emissions and their spatiotemporal dynamics associated with soil remediation activities.

Methods

GHG emission intensity data were collected from published life cycle assessment (LCA) studies and used to calculate emissions from remediated sites between 2006 and 2023. Emissions were calculated for each site, and their spatiotemporal dynamics were analyzed.

Results

Ex-situ remediation contributed about 74.5% more emissions than in-situ remediation and risk control. GHG emissions increased at an average rate of 9.33% from 2006 to 2023, showing four distinct phases: 2006–2010 (− 23.02%), 2010–2016 (39.84%), 2016–2019 (49.76%), and 2019–2023 (− 22.31%). The spatial pattern of emissions showed a southward shift from Beijing, forming a multi-centered distribution as urban development progressed. Sites previously used for manufacturing were the main sources of GHG emissions, primarily concentrated in Beijing and Tianjin.

Conclusion

GHG emissions increased significantly over the past 17 years and showed an uneven expansion trend. Industrial transfer, policy changes, and urban structure caused differences among subregions.