Zhong Cong, Yang Zhongfang, Jiang Wei, Yu Tao, Hou Qingye, Li Desheng, Wang Jianwu
School of Earth Sciences and Resources, China University of Geosciences, No. 29, Xueyuan Road, Haidian District, Beijing, 100083, China.
Environ Sci Pollut Res Int. 2014 Nov;21(21):12305-15. doi: 10.1007/s11356-014-3052-z. Epub 2014 Jun 15.
Industrialization and urbanization have led to a great deterioration of air quality and provoked some serious environmental concerns. One hundred and five samples of atmospheric deposition were analyzed for their concentrations of 13 trace elements (As, Cd, Cu, Fe, Al, Co, Cr, Hg, Mn, Mo, Pb, Se, and Zn) in Shanxi Basin, which includes six isolate basins. The input fluxes of the trace elements in atmospheric deposition were observed and evaluated. Geostatistical analysis (EF, PCA, and CA ) were conducted to determine the spatial distribution, possible sources, and enrichment degrees of trace elements in atmospheric deposition. Fe/Al and K/Al also contribute to identify the sources of atmospheric deposition. The distribution of trace elements in atmospheric deposition was proved to be geographically restricted. The results show that As, Cd, Pb, Zn, and Se mainly come from coal combustion. Fe, Cu, Mn, Hg, and Co originate mainly from interactions between local polluted soils and blowing dust from other places, while the main source of Al, Cr, and Mo are the soil parent materials without pollution. This work provides baseline information to develop policies to control and reduce trace elements, especially toxic elements, from atmospheric deposition. Some exploratory analytical methods applied in this work are also worth considering in similar researches.
工业化和城市化导致空气质量大幅恶化，并引发了一些严重的环境问题。对山西盆地（包括六个独立盆地）的105份大气沉降样本进行了分析，测定了其中13种微量元素（砷、镉、铜、铁、铝、钴、铬、汞、锰、钼、铅、硒和锌）的浓度。观测并评估了大气沉降中微量元素的输入通量。进行了地统计分析（富集因子、主成分分析和聚类分析），以确定大气沉降中微量元素的空间分布、可能来源和富集程度。铁铝比和钾铝比也有助于识别大气沉降的来源。结果表明，大气沉降中微量元素的分布具有地理局限性。结果表明，砷、镉、铅、锌和硒主要来自煤炭燃烧。铁、铜、锰、汞和钴主要源于当地污染土壤与外来扬尘之间的相互作用，而铝、铬和钼的主要来源是未受污染的土壤母质。这项工作为制定控制和减少大气沉降中微量元素特别是有毒元素的政策提供了基线信息。本研究中应用的一些探索性分析方法在类似研究中也值得考虑。
