College of Environment, Sichuan Agricultural University, Chengdu 611130, China.
Guangxi Academy of Fishery Sciences, Nanning 530021, China.
Sci Total Environ. 2017 May 15;586:1076-1084. doi: 10.1016/j.scitotenv.2017.02.092. Epub 2017 Feb 22.
Urban street dusts were collected in commercial area (CA), traffic area (TA), educational area (EA), residential area (RA) and parks area (PA) of Chengdu, China, to investigate the concentrations of heavy metals (Pb, Zn, Cu, Ni, Cd and Cr), and analyzed to evaluated possible sources and health risk assessment. The average concentrations (mg/kg) of Pb (82.3), Zn (296), Cu (100), Cd (1.66) and Cr (84.3) in urban street dusts were all higher than the local soil background values. The concentrations of heavy metals in each functional area could be classified as follows: CA>TA>RA>EA>PA. Principal component analysis and Cluster analysis showed mainly derived from the mixed sources of nature and traffic (51.7%). The results of health risk assessment showed no non-carcinogenic and carcinogenic risks of the metals for inhabitants. However, higher concentrations and oral bioaccessibility of the heavy metals in the dusts from CA and TA, indicating there was more health risks to the inhabitants in than that in other functional areas.
在中国成都的商业区 (CA)、交通区 (TA)、教育区 (EA)、住宅区 (RA) 和公园区 (PA) 采集了城市街道灰尘，以调查重金属 (Pb、Zn、Cu、Ni、Cd 和 Cr) 的浓度，并进行了分析，以评估可能的来源和健康风险评估。城市街道灰尘中 Pb（82.3）、Zn（296）、Cu（100）、Cd（1.66）和 Cr（84.3）的平均浓度均高于当地土壤背景值。每个功能区的重金属浓度可分为以下几类：CA>TA>RA>EA>PA。主成分分析和聚类分析表明，主要来源于自然和交通的混合源（51.7%）。健康风险评估的结果表明，居民没有金属的非致癌和致癌风险。然而，来自 CA 和 TA 的灰尘中重金属的浓度和口腔生物可利用性较高，表明居民的健康风险高于其他功能区。
