Zhao Peipei, Liu Xinxing, Yin Lu, Tian Dezhi, Wang Xingqi
College of Earth Sciences, Hebei GEO University, Shijiazhuang, 050031, China.
Hebei Key Laboratory of Strategic Critical Mineral Resources, Hebei GEO University, Shijiazhuang, 050031, China.
Environ Monit Assess. 2022 Oct 8;194(12):857. doi: 10.1007/s10661-022-10543-5.
Heavy metals in indoor dust are associated with health risks in humans. However, in Shijiazhuang, a city in northern China with severe haze, no research has been published on this topic. To determine the content, distribution characteristics, and sources of heavy metals in indoor dust in the city of Shijiazhuang, indoor dust samples from 33 sampling points in the main urban area of Shijiazhuang were collected and tested. Concentrations of Cu, Ni, Cr, Zn, Cd, and Pb were 87.0, 35.1, 104.4, 568.0, 1.980, and 187.6 mg·kg, respectively; their levels have been discussed statistically in comparison with the reported values in other cities in China. The sources of heavy metals were analyzed using enrichment factor, correlation coefficient, and principal component analysis. The results showed that the levels of all six elements in indoor dust in Shijiazhuang exceeded the background values of soil in Hebei Province. Among these, Cd, Pb, and Zn were significantly enriched. The enrichment factors of Cu, Ni, and Cr were below 10, and their levels at different sampling points were similar, indicating their geogenic source. The corresponding pollution levels of Cd, Pb, and Zn were relatively high, and their levels at different points were significantly different and correlated, indicating that they were derived mainly from transportation. Additionally, the level of Zn was significantly affected by the indoor environment. Our findings provide a basis for conducting health risk assessments in the future.
室内灰尘中的重金属与人类健康风险相关。然而，在中国北方雾霾严重的石家庄市，尚未有关于该主题的研究发表。为了确定石家庄市室内灰尘中重金属的含量、分布特征及来源，采集并检测了石家庄市主城区33个采样点的室内灰尘样本。铜、镍、铬、锌、镉和铅的浓度分别为87.0、35.1、104.4、568.0、1.980和187.6mg·kg；与中国其他城市报道的值相比，对其水平进行了统计讨论。采用富集因子、相关系数和主成分分析等方法分析了重金属的来源。结果表明，石家庄市室内灰尘中所有六种元素的含量均超过河北省土壤背景值。其中，镉、铅和锌显著富集。铜、镍和铬的富集因子低于10，且在不同采样点的含量相似，表明它们来自地质源。镉、铅和锌的相应污染水平相对较高，且在不同点的含量差异显著且相关，表明它们主要来自交通源。此外，锌的含量受室内环境影响显著。我们的研究结果为未来进行健康风险评估提供了依据。
