Notice of RetractionInvestigation of High Fluoride Concentration in Surface Water in the Central Loess Plateau

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 gain a better understanding of high fluoride concentration in surface water in the central of loess plateau, we carried out to detect fluoride concentration in water samples came from 12 towns in Huan County which situated in the central loess plateau using the SPADNS colorimetric method. Analytical results showed that the concentrations of fluoride in all water samples were at the range of 1.06 and 2.95 mg/L. From the analysis, we found that the concentrations of fluoride in all samples were above the maximum allowable concentration for fluoride in drinking water of 1.0 mg/1 in China. On the other hand, the fluoride concentration has regularly changed as seasons exchanged. According to the analysis, it was obvious that fluoride concentration level in surface water has integrated strongly to geological form and environmental factors.