title: [Background values of As and Hg in surface dusts in the vicinity of Kaifeng City and their application].
abstract: Ninety-six surface dust samples and forty-nine topsoil samples were collected from the vicinity of Kaifeng. Concentrations of As and Hg were determined by cold vapor atom fluorescence spectrometry (AFS) and then the background values of As and Hg were calculated. Geoaccumulation Index (I(geo)) and Pollution Load Index (PLI) were used to evaluate the pollution degrees of the surface dust in Kaifeng City based on the background values in dust and soil. The results showed that the background values of As and Hg in surface dust were 8.04 mg x kg(-1) and 22.37 microg x kg(-1), respectively, lower than those in soil, mainly related to organic matter content, particle sizes and the influence of agricultural activities, and also lower than those in fluvo-aquic soil of China. The values of I(geo) and PLI in urban dust of Kaifeng based on the dust background values of the investigation area were higher than those based on the fluvo-aquic soil background values of China. Therefore, the pollutiondegree of dust with heavy metals was actually underestimated if the assessment was based on the fluvo-aquic soil background value.
authors.forename: Yan-Fang
authors.initials: YF
authors.lastname: Chen
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Ma
authors.forename: Yun-Wu
authors.initials: YW
authors.lastname: Dong
authors.forename: De-Xin
authors.initials: DX
authors.lastname: Liu
authors.forename: Xing
authors.initials: X
authors.lastname: Chen
mesh_terms: D000383:Agriculture; D001151:Arsenic / Q000032:analysis*; D002681:China; D002947:Cities; D004391:Dust / Q000032:analysis*; D004784:Environmental Monitoring; D008628:Mercury / Q000032:analysis*; D010316:Particle Size; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D004391:Dust; D012987:Soil; D012989:Soil Pollutants; D008628:Mercury; D001151:Arsenic