Identification and quantification of trace metal(loid)s in water-extractable road dust nanoparticles using SP-ICP-MS

被引：5

作者：

Avramescu, Mary-Luyza ^{[1
]}

Casey, Katherine ^{[1
]}

Levesque, Christine ^{[1
]}

Chen, Jian ^{[2
]}

Wiseman, Clare ^{[3
]}

Beauchemin, Suzanne ^{[1
]}

机构：

[1] Hlth Canada, Environm Hlth Sci & Res Bur, HECS Branch, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada

[2] Natl Res Council Canada, Nanotechnol Res Ctr, 11421 Saskatchewan Dr, Edmonton, AB T6G 2M9, Canada

[3] Univ Toronto, Sch Environm, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2024年 / 924卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Single-particle analysis; SP-ICP-MS; Nanoparticles; Road dust; Metals and metalloids; PLASMA-MASS SPECTROMETRY; QUANTITATIVE-ANALYSIS; ZNO NANOPARTICLES; PARTICLE; EMISSIONS; ELEMENTS; EXHAUST;

D O I：

10.1016/j.scitotenv.2024.171720

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Resuspension of road dust is a major source of airborne particulate matter (PM) in urban environments. Inhalation of ultrafine particles (UFP; < 0.1 mu m) represents a health concern due to their ability to reach the alveoli and be translocated into the blood stream. It is therefore important to characterize chemical properties of UFPs associated with vehicle emissions. We investigated the capability of Single-Particle ICP-MS (SP-ICP-MS) to quantify key metal(loid)s in nanoparticles (NPs; < 0.1 mu m) isolated from road dust collected in Toronto, Canada. Water extraction was performed to separate the <1-mu m fraction from two different road dust samples (local road vs. arterial road) and a multi-element SP-ICP-MS analysis was then conducted on the samples' supernatants. Based on the particle number concentrations obtained for both supernatants, the metal(loid)-containing NPs could be grouped in the following categories: high (Cu and Zn, > 1.3 x 10(11) particles/L), medium (V, Cr, Ba, Pb, Sb, Ce, La), low (As, Co, Ni, < 4.6 x 10(9) particles/L). The limit of detection for particle number concentration was below 5.5 x 10(6) particles/L for most elements, except for Cu, Co, Ni, Cr, and V (between 0.9 and 7.7 x 10(7) particles/L). The results demonstrate that road dust contains a wide range of readily mobilizable metal(loid)-bearing NPs and that NP numbers may vary as a function of road type. These findings have important implications for human health risk assessments in urban areas. Further research is needed, however, to comprehensively assess the NP content of road dust as influenced by various factors, including traffic volume and speed, fleet composition, and street sweeping frequency. The described method can quickly characterize multiple isotopes per sample in complex matrices, and offers the advantage of rapid sample scanning for the identification of NPs containing potentially toxic transition metal(loid)s at a low detection limit.

引用

页数：11

共 83 条

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