School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi 435003, China.
Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation, Hubei Polytechnic University, Huangshi 435003, China.
Int J Environ Res Public Health. 2022 Sep 2;19(17):10970. doi: 10.3390/ijerph191710970.
This study aimed to assess the pollution levels, sources, and human health risks of heavy metals in street dust from a typical industrial district in Wuhan City, Central China. In total, 47 street dust samples were collected from the major traffic arteries and streets around Wuhan Iron and Steel (Group) Company (WISC) in Qingshan District, Wuhan. The concentrations of heavy metals (Cr, Mn, Ni, Zn, Fe, Cu, and Cd) in street dust were determined by atomic absorption spectroscopy. Results indicated that the mean concentrations of Zn (249.71 mg/kg), Cu (51.15 mg/kg), and Cd (0.86 mg/kg) in street dust were higher than their corresponding soil background values in Hubei Province. Heavy metal enrichment is closely related to urban transportation and industrial production. The pollution level of heavy metals in street dust was assessed using the geo-accumulation method () and potential ecological risk assessment (PERI). Based on the value, Cr, Mn, Fe, and Ni showed no pollution, Zn and Cu showed light to moderate contamination, and Cd showed moderate contamination. The PERI values of heavy metals in street dust ranged between 76.70 and 7027.28, which represents a medium to high potential ecological risk. Principal component analysis showed that the sources of heavy metals in street dust were mainly influenced by anthropogenic activities. Among the studied metals, Cu, Cr, Zn, Fe, and Mn mainly come from industrial processes, while Ni and Cd come from traffic exhaust. The non-carcinogenic risk indexes of heavy metals for children and adults are ranked as Cr > Cu > Ni > Cd > Zn. The health risks to children through the different exposure pathways are higher than those for adults. Hand-to-mouth intake is the riskiest exposure pathway for non-carcinogenic risk. In addition, Cr, Ni, and Cd do not pose a carcinogenic risk for the residents.
本研究旨在评估中国中部武汉市典型工业区街道灰尘中重金属的污染水平、来源和对人类健康的风险。共采集了武汉市青山区武汉钢铁（集团）公司（WISC）周边主要交通干道和街道的 47 个街道灰尘样本。采用原子吸收光谱法测定街道灰尘中重金属（Cr、Mn、Ni、Zn、Fe、Cu 和 Cd）的浓度。结果表明，街道灰尘中 Zn（249.71mg/kg）、Cu（51.15mg/kg）和 Cd（0.86mg/kg）的平均浓度高于湖北省相应土壤背景值。重金属富集与城市交通和工业生产密切相关。采用地积累指数（）和潜在生态风险评价（PERI）评估街道灰尘中重金属的污染水平。基于 值，Cr、Mn、Fe 和 Ni 无污染，Zn 和 Cu 轻度至中度污染，Cd 中度污染。街道灰尘中重金属的 PERI 值在 76.70 至 7027.28 之间，表明具有中到高的潜在生态风险。主成分分析表明，街道灰尘中重金属的来源主要受人为活动的影响。在所研究的金属中，Cu、Cr、Zn、Fe 和 Mn 主要来自工业过程，而 Ni 和 Cd 则来自交通尾气。儿童和成人的重金属非致癌风险指数的排列顺序为 Cr>Cu>Ni>Cd>Zn。不同暴露途径下儿童的健康风险高于成人。经口摄入是对非致癌风险最危险的暴露途径。此外，Cr、Ni 和 Cd 对居民没有致癌风险。
