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Real-world emission for in-use non-road construction machinery in Wuhan, China

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Abstract

Non-road construction machinery (NRCM) emissions pollutants significantly impact air quality. Six typical NRCM (2 excavators, 3 loaders, and 1 forklift) are analyzed based on a portable emission measurement system (PEMS) in Wuhan to estimate the real-world emission characteristics and chemical composition of PM2.5 of NRCM. The results show that the fuel-based average emission factors (EFs) of carbon monoxide (CO), hydrocarbon (HC), nitrogen oxides (NOx), and particulate matter (PM) are 19.4 ~ 35.7 g kg−1 fuel, 2.9 ~ 7.9 g kg−1 fuel, 57.5 ~ 95.3 g kg−1 fuel, and 1.8 ~ 2.6 g kg−1 fuel for the tested NRCM. The high NOx EF implies that the regulation of NOx emission in Wuhan should be strengthened. In addition, the PM2.5 chemical composition profiles for NRCM show that the PM2.5 emitted from NRCM is dominated by organic carbon and elemental carbon (56.11 ~ 73.85%), followed by water-soluble ions (WSIs, 1.47 ~ 3.46%), and elements (0.16 ~ 0.41%). The major WSIs species are Cl, Na+ and NO3, and the major elements are Ca, Na, and K, which are important markers for PM2.5 source analysis. The results of EFs and chemical composition emission characteristics of NRCM tailpipe pollutants obtained in the real-world can provide essential data support for accurately establish of emission inventory of non-road mobile sources in Wuhan.

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The data and materials that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

The authors are grateful for the analytical support from the Analytical and Testing Center of Huazhong University of Science and Technology.

Funding

This work was supported by the National Key Research and Development Plan of China [grant numbers 2019YFC0214301]; the National Research Program for Key Issues in Air Pollution Control [grant numbers DQGG202146].

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All authors contributed to the study conception and design. Mi Zhang: conceptualization, methodology, formal analysis, data curation, writing — original draft, and supervision. **aoyong Liu: formal analysis, investigation, and data curation. Kunpeng Li: investigation and data curation. Hao Huang: methodology, writing — review and editing. Hui Hu: conceptualization, methodology, resources, writing — review and editing, supervision, project administration, and funding acquisition. All authors read and approved the final manuscript.

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Correspondence to Hui Hu.

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Zhang, M., Liu, X., Li, K. et al. Real-world emission for in-use non-road construction machinery in Wuhan, China. Environ Sci Pollut Res 30, 46414–46425 (2023). https://doi.org/10.1007/s11356-023-25453-3

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  • DOI: https://doi.org/10.1007/s11356-023-25453-3

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