Notice of RetractionStudy on Characteristics of Cr(III) Removal by Fly Ash in Aqueous Solution

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.

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The leaching characteristics of harmful elements, mainly heavy metals, from fly ash in aqueous solution were analyzed, and fly ash was used as adsorbent to remove Cr(III) in aqueous solution, affecting factors were studied to optimize operation conditions. Desorption effect was checked as well. The results showed that the lixivium of fly ash was alkaline, 7 kinds of metals with different concentrations were detected in solution, and concentration of leaching elements were lower than those of state standard GB5085-85 and GB8978-88 except for pH value. It was safe in aqueous solution without excessive harmful pollution. Fly ash was effective to remove Cr(III), and the operation conditions could affect adsorption capacity to some extent. The optimal environmental condition was of pH 4.5, dosage of fly ash 0.2 g, concentration of Cr(III) 20 mg/L. The temperature affect little on adsorption process, normal temperature is acceptable. Adsorption process was fast and the adsorption capacity was 14.95 mg/g at 10 min, and the maximum desorption rate was 93.0%. The result is of great significance for adsorption mechanism investigation and practical application in future.