Notice of RetractionRemoving BTEX from Contaminated Groundwater by Adsorption of Peat and Degradation of Immobilized Microorganism

Notice of Retraction

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The adsorption capability of peat after pretreatment and the degrading characteristics of immobilized BTEX degrading bacteria on the removal of BTEX were evaluated. Results show that: the adsorption of BTEX by peat could reach balance in 20min. The pseudo second-order equation fitted perfectly the adsorption kinetics curve of peat towards BTEX. The adsorption data obtained were well described by the Freundlich adsorption model. The results indicate that the maximum adsorption capacity was (mg·g^-1): (benzene) 0.836, (toluene) 0.890, (ethylbenzene) 1.590, (xylene) 1.814. Peat was also used to immobilize the BTEX-degrading bacteria via adsorption method. The adsorption rate of BTEX on peat could reach 76% after 2 days. The removal rate of BTEX by immobilized bacteria was higher than suspended bacteria, which could reach about 90% over a wide range of concentrations (20-80mg·g^-1).