Elemental composition and risk assessment of heavy metals in the PM10 fractions of road dust and roadside soil--颗粒学报PARTICUOLOGY

Zhang, J., Wu, L., Zhang, Y., Li, F., Fang, X., & Mao, H. (2019). Elemental composition and risk assessment of heavy metals in the PM10 fractions of road dust and roadside soil. Particuology, 44, 146-152. https://doi.org/10.1016/j.partic.2018.09.003

Elemental composition and risk assessment of heavy metals in the PM₁₀ fractions of road dust and roadside soil

Jing Zhang ^{a b c}, Lin Wu ^a, Yanjie Zhang ^a, Fenghua Li ^a, Xiaozhen Fang ^a, Hongjun Mao ^a *

a Center for Urban Transport Emission Research (CUTER), College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
b Tianjin Eco-Environmental Monitoring Center, Tianjin 300191, China
c Tianjin-Tianbinruicheng Environmental Technology and Engineering Co., Ltd., Tianjin 300190, China

10.1016/j.partic.2018.09.003

Volume 44, June 2019, Pages 146-152

Received 12 July 2017, Revised 10 September 2018, Accepted 14 September 2018, Available online 22 February 2019, Version of Record 30 April 2019.

E-mail: hongjunm@nankai.edu.cn

Highlights

• Composition and particle mass size distribution of various dusts were determined.

• Particles in the size range of 2.5–16 μm dominated the mass and concentrations.

• High Igeo values of Pb, Zn, Cu, Sb, Sn and Cd implied contamination of road and roadside dusts.

Abstract

A total of 64 dust samples were analyzed to determine the size distribution and elemental composition of the PM₁₀ fraction, including 42 road dust (RD), 12 roadside soil (RSD), and 10 park road dust (PRD) samples. The mass of dust smaller than 20 μm was dominated by particles sized 2.5–16 μm, which accounted for 85%, 88%, and 87% of the RD, PRD, and RSD, respectively. Additionally, crustal elements accounted for 30.14%, 36.35%, and 37.14% of the PM₁₀ fractions of the RD, RSD, and PRD, respectively. The most abundant trace elements in RD, RSD, and PRD were Zn, Mn, and Cu (range, 277 to 874 mg/kg). Moreover, the I_geo values revealed all dusts were contaminated with Pb, Zn, Cu, Sb, Sn, and Cd. Health risk assessment showed that Mn, Ni, Cu, Zn, Cd, Sb, and Pb in the PM₁₀ fraction of three types of dusts posed non-cancer risks to children but posed no non-cancer risk to adults. Additionally, As, Ni, and Cd posed no cancer risk to inhabitants.

Graphical abstract

Keywords

Road dust; Mass size distribution; PM₁₀; Elemental composition; Health risk assessment

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