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Abstract
The wide utilization of zinc oxide nanoparticles (ZnO NPs) in many products could cause their release into wastewater treatment plants. Although the potential effects of ZnO NPs on synthetic wastewater treatment have been studied, reports concerning their impacts on biological nitrogen (N) and phosphorus (P) removal from real wastewater are sparse, and the related mechanisms of these effects are still unclear. In this study, the influences of ZnO NPs on nitrogen and phosphorus removal from real municipal wastewater were investigated, and the results were compared with those using synthetic wastewater. The data showed that 50 mg/L ZnO NPs did not affect the settleability and membrane integrity of activated sludge fed with real or synthetic wastewater. Although the deterioration of N and P removal from both wastewaters was observed, the ZnO NPs-induced inhibition to real wastewater treatment was smaller than that to synthetic wastewater treatment (36% versus 100% inhibition to phosphorus removal). Fluoresce...
Published Version
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