Notice of RetractionStudy on the Combination Remediation of Petroleum Contaminated Soil by Degrading Bacterial and Winter Wheat

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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Through indoor experiments, the effect of petroleum contaminated soil on growth of the winter wheat, degradation of petroleum hydrocarbon by the winter wheat and the petroleum degrading bacterial, and changes of catalase activity with time were studied. The results showed that, after combined remediation, total petroleum hydrocarbons (TPH) disappeared from the rhizosphere soil faster than the non-rhizophere soil. The TPH removal of combined remediation was higher than that of microbial remediation, which indicated that the winter wheat promoted the degradation of petroleum by the microorganisms. During the combined remediation, the degradation of TPH was related to the growth of the winter wheat. The main period for the TPH removal was from the turning green stage to the flowering stage. The Catalase activity increased after the combined remediation for 126 days. And there was positive relation between the catalase activity and the TPH removal.