Notice of RetractionThe Pollution Surveys and Analysis of Polycyclic Aromatic Hydrocarbons at Mineral Separation Plant

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.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

In order to find out the distribution of ploycyclic aromatic hydrocarbons of aerosol (PM₁₀, PM₂₅) and standardize the system of beneficiation reagent and provide basis for monitoring air, five sampling areas were set up from June, 2008 to October, 2008, in the period. The researchers collected samples of PM₁₀, PM₂₅ and pretreated them by the methods such as soxhelt extraction, concentrated by Kuderna-Danish concentrator and blowing high purity nitrogen in sequence. In addition, Gas chromatography and mass spectrometry(GC-MS) is used to ascertain Ploycyclic Aromatic Hydrocarbons of the pretreated samples in this paper. The results show that our analysis establishes some important results as follows: Collecting and testing thirty-five samples of PM₁₀, PM₂₅, the pollution of PM₁₀, PM₂₅ are serious, excessive rates were 82.80 % and 97.10 %, the maximum exceeding ratio reached 3.02 times and 5.57 times respectively. A total of thirty-five PM₁₀, PM₂₅ samples were detected respectively and 16 kids of typical PAHs can are inspected in every samples, Levels of benzo[a] pyrene are in the range from 1.03 ng/m³ to 23.35 ng/m³ (PM₁₀) and 0.24 ng/m³ to 18.75 ng/m³ ( PM_2.5), with an overall mean of 5.07 (PM₁₀) and 3.91 (PM_2.5). Indicate the serious pollution of ploycyclic aromatic hydrocarbons in the mineral separation plant, be harm- ul to health of workers and should be attached importance by corrective department.