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Particle Size Dependent Heavy Metals in Road Dusts from Maanshan City, China

  • Environmental Engineering
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Abstract

In this study the road dusts (RDs) <1,000 μm from Maanshan City, China were characterized from the prospects of size fractionated pollution by heavy metals (HMs). Particulates with size <75 μm, 75–125 μm, 125–250 μm, 250–500 μm and 500–1,000 μm averagely accounted for 35.7±11.7%, 14.6±11.0%, 25.3±12.5%, 11.6±8.8% and 12.8±12.9% of the total weight, respectively. This result implies the gravimetric percentage was overall declined with increasing granular size, following gamma distribution function (p < 0.001). It was observed that the highest contents of Zn, Ni, Pb and Cd occurred with the fine RDs < 75 μm while Cu with these < 125 μm, suggesting HMs preferred to be associated with the fine particulates. Cu, Zn, Ni, Pb, Cr and Cd were present in RDs with bulk contents of 68±30 mg/kg, 285±122 mg/kg, 23±16 mg/kg, 53±21 mg/kg, 432+297 mg/kg and 0.56±0.39 mg/kg, which resulted in geo-accumulation index (lgeo) values as -1.04, 2.35, -2.38, 0.38, 1.54 and 0.18, respectively. Hence, it can be concluded that the RDs had only been significantly polluted by Zn. Person correlation analysis suggests those HMs ubiquitously present in RDs had size-dependent sources.

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (Grant No. 41701553 and 51709001),the Natural Science Foundation of Anhui Province (Grant No. 1808085QD109), and the Scientific Research Foundation for the Returned Overseas Chinese Scholars of Anhui Province.

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Correspondence to Siping Niu.

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Niu, S., Song, X., Yu, J. et al. Particle Size Dependent Heavy Metals in Road Dusts from Maanshan City, China. KSCE J Civ Eng 24, 1411–1423 (2020). https://doi.org/10.1007/s12205-020-2193-5

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  • DOI: https://doi.org/10.1007/s12205-020-2193-5

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