In order to investigate the heavy metal pollution level and distribution characteristics in different particle sizes, and to evaluate the health risk, 42 street dust samples were collected in January 2015 from Huangshi, as an industrial city in Central China. The results analyzed by flame atomic absorption spectrometry (FAAS) showed that the average content of Cu, Pb, Zn, Cd, Mn, and Fe in the fine particle diameter (< 25 μm) was 1041.12, 361.64, 890.00, 14.43, 3178.52, and 61841.79 mg kg −1 , respectively. Meanwhile, the average content of Cu, Pb, Zn, Cd, Mn, and Fe in the coarse particle diameter (25 < D < 75 μm) was 1628.54, 401.52, 593.16, 9.54, 5316.07, and 76765.37 mg kg −1 , respectively. Compared with other cities, the heavy metal pollution of street dust in Huangshi was more serious. The results indicated that heavy metals were more easily enriched in fine grains street dust, except for Cu, Mn, and Fe. The heavy metal elements showed obvious spatial heterogeneity in different regions, and the interference from human sources was greater. Heavy metals in Huangshi street dust are generally at moderate or higher pollution levels (except Fe), of which Cu and Cd are the most seriously polluted. Multivariate statistical analysis shows that the heavy metals in fine-grained street dust mainly come from traffic/industrial mixed sources (74.5%) and industrial sources (25.5%); the heavy-grained street dust heavy metals mainly come from mixed traffic/industrial sources (55.1%) and soil source (44.9%). For non-carcinogenic heavy metals, mainly through the hand-mouth contact pathway into the human body, there are also no non-carcinogenic health risks in both hand-mouth ingestion and dermal contact. For carcinogenic heavy metals, Cd in street dust did not have carcinogenic risk.

中文翻译：

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华中某工业城市街道粉尘粒径组分重金属污染特征

为研究不同粒径的重金属污染水平及分布特征，评估健康风险，于2015年1月在华中工业城市黄石采集了42份街道粉尘样本。火焰原子吸收光谱（FAAS）分析结果表明，细颗粒直径（<25 μm）中Cu、Pb、Zn、Cd、Mn、Fe的平均含量分别为1041.12、361.64、890.00、14.43、3178.52、和 61841.79 mg kg -1 ，分别。同时，粗粒径（25 < D < 75 μm）中Cu、Pb、Zn、Cd、Mn和Fe的平均含量分别为1628.54、401.52、593.16、9.54、5316.07和76765.37 mg kg -1 . 与其他城市相比，黄石市街道扬尘重金属污染更为严重。结果表明，除 Cu、Mn 和 Fe 外，重金属更容易在细颗粒街道灰尘中富集。重金属元素在不同区域表现出明显的空间异质性，人为干扰较大。黄石街道扬尘中的重金属一般处于中等或较高污染水平（Fe除外），其中Cu和Cd污染最严重。多元统计分析表明，细粒度街道粉尘中的重金属主要来自交通/工业混合源（74.5%）和工业源（25.5%）；大颗粒街道扬尘重金属主要来自交通/工业混合源（55.1%）和土壤源（44.9%）。对于非致癌重金属，主要通过手口接触途径进入人体，手口摄入和皮肤接触也不存在非致癌的健康风险。对于致癌重金属，街道灰尘中的Cd没有致癌风险。