Song Yi, Lu Xin-Wei, Zhou Xiao, Ge Zi-He
School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China.
Huan Jing Ke Xue. 2020 Jul 8;41(7):3130-3135. doi: 10.13227/j.hjkx.201912153.
Fifty dust samples were collected from Xingtai City to study the source characteristics of heavy metals in suspended particles of urban road dust from industrial enterprise transformation cities. The contents of Cr, Mn, Co, Ni, Cu, Zn, As, and Pb in particles of urban road dust smaller than 100 μm were determined by X-ray fluorescence spectrometry, and their pollution levels were assessed by enrichment factor. The possible sources of heavy metals measured in the dust were identified by multivariate statistical analysis methods including correlation analysis, principal component analysis, and cluster analysis. The results indicated that in comparison to the element background values of local soil, the particles of urban road dust smaller than 100 μm from Xingtai City had higher Cr, Mn, Co, Cu, Zn, and Pb concentrations. The accumulation level of Co was the highest, followed by Zn, and Pb and Cu, whereas the other trace metals were deficient or showed minimal enrichment in the suspended road dust. The multivariate statistical analysis results showed that Cr, Mn, and Ni had significant positive correlation. These metals belong to both a principal component and a cluster, whereas Cu, Zn, and Pb belong to just a principal component. Considering the content characteristics and the results of multivariate statistical analysis of various heavy metal elements in the suspended samples, these results illustrated that the Cr, Mn, and Ni in the suspended particles of urban dust from Xingtai City roads mainly come from natural and industrial sources, whereas the Zn, Pb, and Cu originate from transportation and coal sources; As comes from natural sources, and Co is mainly affected by industrial activities.
采集了邢台市50个灰尘样本，以研究工业企业转型城市城市道路灰尘悬浮颗粒中重金属的来源特征。采用X射线荧光光谱法测定了小于100μm的城市道路灰尘颗粒中Cr、Mn、Co、Ni、Cu、Zn、As和Pb的含量，并通过富集因子评估了它们的污染水平。通过相关性分析、主成分分析和聚类分析等多元统计分析方法，确定了灰尘中测量的重金属的可能来源。结果表明，与当地土壤元素背景值相比，邢台市小于100μm的城市道路灰尘颗粒中Cr、Mn、Co、Cu、Zn和Pb的浓度较高。Co的累积水平最高，其次是Zn、Pb和Cu，而其他痕量金属在道路灰尘悬浮颗粒中缺乏或富集程度最低。多元统计分析结果表明，Cr、Mn和Ni具有显著的正相关。这些金属既属于一个主成分又属于一个聚类，而Cu、Zn和Pb仅属于一个主成分。综合考虑悬浮样本中各种重金属元素的含量特征和多元统计分析结果，这些结果表明，邢台市城市道路灰尘悬浮颗粒中的Cr、Mn和Ni主要来自自然源和工业源，而Zn、Pb和Cu则来自交通源和煤炭源；As来自自然源，Co主要受工业活动影响。
