School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Shanghai 200433, China.
School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
J Environ Sci (China). 2018 Sep;71:283-291. doi: 10.1016/j.jes.2018.05.031. Epub 2018 Jun 14.
Through field sampling of atmospheric dustfall in regions of Zhuzhou City, China for a period of one year, the deposition fluxes of atmospheric dustfall and five heavy metals contained inside, including Cr, As, Cd, Hg and Pb, were analyzed. Meanwhile the enrichment factor and index methods were used to analyze the pollution characteristics of heavy metals of atmospheric dustfall in Zhuzhou. The annual deposition flux of atmospheric dustfall in Zhuzhou was 50.79 g/(m·year), while the annual deposition fluxes of Cr, As, Cd, Hg and Pb were 9.80, 59.69, 140.09, 0.87 and 1074.91 mg/(m·year), respectively. The pollution level of atmospheric dustfall in Zhuzhou was relatively lower compared with most other cities in China, but the deposition fluxes of As, Cd, Hg and Pb in atmospheric dustfall in Zhuzhou were much higher than that in most cities and regions around the world. Cd is the typical heavy metal element in atmospheric dustfall in Zhuzhou, and both the enrichment factor and pollution index of Cd were the highest. Cd, Hg, Pb and As in atmospheric dustfall were mainly from human activities. According to the single-factor index, Nemerow index and pollution load index analyses, the atmospheric dustfall in Zhuzhou could easily cause severe heavy metal pollution to urban soil, and the most polluting element was Cd, followed by Pb, As and Hg. Only the pollution level of Cr lay in the safety region and mainly originated from natural sources.
通过对中国株洲市地区大气降尘进行为期一年的野外采样，分析了大气降尘的沉积通量和其中包含的五种重金属（Cr、As、Cd、Hg 和 Pb）的沉积通量。同时，采用富集因子和指数法分析了株洲大气降尘重金属的污染特征。株洲大气降尘的年沉积通量为 50.79 g/（m·年），而 Cr、As、Cd、Hg 和 Pb 的年沉积通量分别为 9.80、59.69、140.09、0.87 和 1074.91 mg/（m·年）。与中国大多数城市相比，株洲大气降尘的污染水平相对较低，但株洲大气降尘中 As、Cd、Hg 和 Pb 的沉积通量远高于世界上大多数城市和地区。Cd 是株洲大气降尘中典型的重金属元素，其富集因子和污染指数均最高。大气降尘中的 Cd、Hg、Pb 和 As 主要来自人类活动。根据单因子指数、内梅罗指数和污染负荷指数分析，株洲大气降尘容易对城市土壤造成严重的重金属污染，最主要的污染元素是 Cd，其次是 Pb、As 和 Hg。只有 Cr 的污染水平处于安全区域，主要来源于自然来源。
