Notice of RetractionSite investigation of a Chromite Ore Processing Residue contaminated site

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.

A typical Chromite Ore Processing Residue (COPR) contaminated site was investigated to ascertain the pollution degree and spatial distribution of Chromium. The drill hole sampling method was used. In the polluted site, 13 holes were drilled. One soil sample was sampled per meter. Total and hexavalent chromium was analyses. Based on the analysis results of the soils, spatial distribution of total and hexavalent chromium was studied by SUFER 8.0 and kriging interpolation technology. The results showed that the geological structures in shallow formation are mostly Quaternary and Cretaceous strata. The average thickness of the aquifer is about 6.5m. The site had a poor permeability of soil and the field coefficient of permeability ranged from 0.114~0.172m/d. The site was seriously polluted by Chromium. In soil, the maximum concentration of total chromium was 42229.79 mg/kg, that of hexavalent chromium was 7481.12 mg/kg. The content of chromium in the soil section showed that the content of soil was downtrend from the ground surface to the bottom, and the higher the chromium concentration of the surface the faster the content decreases.