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Experiment and calculation of deposition velocity of suspended particles in storm drainage

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Abstract

Deposition particles can lead to blockage, odor, and corrosion of pipes, and the deposition process of suspended particles is particularly complicated. In order to quantify the deposition process of suspended particles and mastered the critical conditions for the deposition in storm drainage, the process was simulated experimentally, and the deposition states of suspended particles under the different roughness of pipe wall, particle size, and density were analyzed. Two mathematical models of deposition critical velocity and easy deposition velocity were established. Results showed that with the increase of particle size and density, the gravity of particles increased and deposition was more likely to occur. In the rough pipeline, the kinetic energy consumption of water flow increased, the ability to carry particles was weakened, and the deposition rate would increase accordingly. The higher the flow velocity, the lower the deposition rate. The deposition states of particles in the pipeline could be divided into three types according to the deposition rates: “no deposition,” “minor deposition,” and “bulk deposition.” Verification showed that the difference rates between the calculated values and measured values of the deposition critical velocity ranged from − 3.23 to 2.86%, and the difference rates of the easy deposition velocity were − 4.14–4.72%, showing good consistency.

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All data generated or analyzed during this study are included in this published article and its supplementary information files.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 51808285), Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. SJCX22-0475).

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All authors contributed to the conception and design of this study. The first draft of the manuscript was written by Yang Tao. The material preparation, data collection, and analysis were performed by Haodong Wei, Wenke Lv, Qi Liu, and Jingqin Zhou. The oversight and leadership responsibility for the research activity planning and execution, as well as the critical review and revision of the first draft, were performed by Cuiyun Liu. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Cuiyun Liu.

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Tao, Y., Wei, H., Lv, W. et al. Experiment and calculation of deposition velocity of suspended particles in storm drainage. Environ Sci Pollut Res 30, 20255–20264 (2023). https://doi.org/10.1007/s11356-022-23543-2

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  • DOI: https://doi.org/10.1007/s11356-022-23543-2

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