Notice of RetractionStudy on process conditions of Chromite Ore Processing Residue contaminated soil washing with water

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.

Using distilled water as washing agent, the process conditions for removal of hexavalent chromium from Chromite Ore Processing Residue (COPR) contaminated soils were discussed in the paper, including the solid-liquid ratio, cleaning time, temperature and oscillation frequency. The best parameters obtained by single-factor test and orthogonal test, using hexavalent chromium removal efficiency indicators as the evaluation of cleaning process conditions, optimization the optimum conditions of soil washing. The results showed that: when cleaning time, temperature, oscillation frequency, and solid-liquid ratio were selected for 105min, 50°C, 200r/min and 1:40 respectively, the experimental result is the best. In this condition, we can remove the hexavalent chromium from soil effectively. The results provide the reference for the hexavalent chromium contaminated soil washing remediation technology.