CuO NPs长期暴露对SBR废水处理效果的影响

Long-term Effect of CuO Nanoparticles on Wastewater Treatment in SBR

研究了两种不同浓度CuO NPs(1 mg/L和10 mg/L)长期暴露对SBR反应器出水水质的影响。结果表明,在进水CuO NPs浓度为1 mg/L和10 mg/L,长期运行120 d后,SBR1(1 mg/L)和SBR2(10 mg/L)反应器出水的COD、氨氮(NH4+-N)和亚硝态氮(NO2--N)浓度与对照组(SBR0)相比没有明显变化,出水COD、NH4+-N基本被完全去除。然而,出水总磷(TP)和硝态氮(NO3--N)的浓度发生明显变化,SBR1和SBR2出水TP浓度相较于SBR0的0.20 mg/L分别升高到1.07 mg/L和1.65 mg/L,而出水NO3--N浓度相较于SBR0的5.86 mg/L分别降低为3.86 mg/L和3.01 mg/L。

Long-term effects of CuO NPs（1 mg/L and 10 mg/L） on wastewater treatment in SBRs were investigated. Results showed that after exposure to 1 mg/L and 10 mg/L CuO NPs for 120 d, the effluent COD, NH4^＋--N and NO2^- -N of SBR1 （1 mg/L） and SBR2 （10 mg/L） did not show significant difference when compared with the control SBR0. Almost all COD and NH4^＋-N in each reactor were removed. However, the effluent concentrations of TP and NO3^- -N obviously changed with increasing exposure time. The concentrations of the effluent TP of SBR1 and SBR2 （1.07 mg/L and 1.65 mg/L） were higher than that of SBR0 （0.30 mg/L）. Average concentration of effluent NO3^- -N of SBR1 and SBR2 were 3.86 mg/L and 3.01 mg/L respectively, which were lower than SBR0 with 5.86 mg/L.