Notice of RetractionThermodynamics Study on Removing Nitrate Nitrogen from Wastewater with Anion Exchange Resins

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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Nitrate nitrogen in wastewater has serious threat. We adopted 201×7, D201, D301 and D301_f four anion exchange resins studied adsorption isotherms on the simulate fertilizer factory wastewater (nitrate nitrogen concentration is 300 mg/L), nitrate nitrogen adsorption equilibrium onto four resins can be achieved basically within 30~50 minutes, all adsorption isotherms were in line with Freundlich model, selected D301_f resin treated nitrate nitrogen wastewater more perfectly; Adsorption capacity results indicated : adsorption of nitrate nitrogen onto D301_f resin was more perfectly at solution pH=6.0~7.0 and temperature at 293K~303K; Thermodynamics experimental results indicated: adsorption of nitrate nitrogen onto D301_f resin ΔH>;0, ΔG<;0 and ΔS>;0, which indicted this course could proceed to forward direction spontaneously, and also was endothermic course.