Notice of RetractionResearch on Hexavalent Chromium Removal from Wastewater by Gas Quenching Steel Slag

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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Gas quenching steel slag (GQSS), which was prepared by gas quenching equipment under inert atmosphere, possessed some advantages for pollutants removal from wastewater. Static state experiment has been carried on to investigate Cr(VI) removal from wastewater by GQSS. The results indicated that initial pH value, solid-liquid ratio, Cr(VI) original concentration and dissolved oxygen in solution have significant influence on Cr(VI) removal percentage. Cr(VI) solution had better to be controlled in acidic condition because Cr(VI) reduction could be restrained in alkaline solution. On the other hand, the initial pH value could not much lower because precipitation of Cr(III) could be inhibited. To improve Cr(VI) removal percentage, the solid-liquid ratio should be controlled at 1:100. Under different original concentrations, Cr(VI) removal percentage was in the range of from 20% to 45% because the GQSS without any further treatment and modification.