Notice of RetractionA study on the pollution level and the characteristics of trace elements of inhalable particulate matter in Pingdingshan city

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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Based on Negritti (medium-big-volume sampler) and MiniVol (mini-medium-volume sampler) two instruments, intensive samplings on inhalable particulate matter (PM₁₀) in Pingdingshan city have been conducted, the mass concentrations of PM₁₀ was weighted, and the content of parts of heavy metals of PM₁₀ was tested by ICP-MS in this paper. The relationship between the concentration of PM₁₀ and the meteorological condition was discussed. The experiments indicate that the mass concentrations variation of PM₁₀ and the wind speeds had an inverse ratio of correlation, and the mass concentrations variation of PM₁₀ and the humidity had a positive ratio of correlation. The contamination extent of heavy metals in inhalational particles is rather serious in Pingdingshan city. The pollution of Pb, Zn and Cu in the collected samples is the most serious, and the enrichment fact of Pb, Zn, Cu, Fe and Cd is 825.3, 633.5, 63.7, 14.6 and 13.1 respectively. This indicates that the contamination of heavy metals correlate with vehicular exhaust and coal combustion.