Differences in the Coupling Relationship Between Carbon Emissions and Pollutants in Emission Control Industries: A Case Study of Fujian Province

  • XIE Xiaogang
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  • Fujian Ecology Environment Information Center, Fuzhou 350001, China

Received date: 2025-05-23

  Online published: 2026-03-11

Abstract

Through analyzing the correlation between carbon emissions and pollution source data of key emission-control enterprises in Fujian Province, differences in emission dynamics, response mechanisms, and coupling relationships between the power and cement industries were explored, to provide a scientific basis for regional environment improvement and sustainable development. Machine learning models, STL decomposition, trend significance analysis, quantitative analysis, and coupling-decoupling analysis were employed to reveal the emission characteristics of key emission-control enterprises based on data from 2016 to 2023. The results indicate that while seasonal emissions remain stable, trends vary: SO2 and PM emissions decline steadily, validating the effectiveness of control measures, while CO2 and NOx emissions exhibit fluctuating increases, particularly notable in 2023, indicating a need for optimized reduction strategies. Absolute difference comparative analysis shows the power industry has achieved significant reductions in SO2 and PM reduction(down 31.4% and 42.7%, respectively), with NOx showing a fluctuating decline(reduction rate rising to 11.5%) but insufficient CO2 control(up 47.8%). In the cement industry, PM emission decreased significantly(49.2%), yet SO2 emissions rebounded(42.6%) and CO2 rose(55.2%). Coupling analysis reveals strong coupling in power plants(correlation coefficient r>0.7), while cement plants exhibit unstable decoupling with frequent coupling points. Trend forecasts suggest a high risk of SO2 emission increases in cement industry and limited reductions in power industry, underscoring the urgency of energy transition. These findings highlight the disparities in emission reduction technologies and policy implementation among industries, emphasizing the necessity to enhance denitrification and carbon capture technologies in the power industry while implementing stricter supervision on the cement industry to achieve synergistic emission reduction goals. This study provides data support for the formulation of differentiated environmental policies and optimization emission reduction strategies for regional key emission-control enterprises.

Cite this article

XIE Xiaogang . Differences in the Coupling Relationship Between Carbon Emissions and Pollutants in Emission Control Industries: A Case Study of Fujian Province[J]. Journal of Subtropical Resources and Environment, 2026 , 21(1) : 139 -150 . DOI: 10.19687/j.cnki.1673-7105.2026.01.015

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