多聚磷酸络合纳米铜降解罗明丹B研究

Study on RhB Degradation by Polyphosphoric Acid Complexed with Nano Copper

为增强纳米零价铜(nZVC)/H2O2体系在中性条件下的氧化能力,以罗明丹B(RhB)模拟染料废水为对象,对nZVC/H2O2/多聚磷酸(PPA)体系氧化降解RhB效果进行了研究。结果表明,反应60 min时,nZVC/H2O2体系中RhB的降解率为13.49%,nZVC/H2O2/PPA体系中RhB的降解率为89.29%;通过投加叔丁醇发现,体系中反应物种主要为HO·;pH的改变对nZVC/H2O2/PPA体系氧化能力影响不大;同时,提高H2O2、PPA、nZVC投加量均会对RhB的降解起促进作用;降解反应遵循二级反应动力学。PPA的加入可以有效提升nZVC/H2O2体系在中性条件下的氧化能力,有效降解水中目标污染物。

In order to enhance the oxidation capacity of nZVC/H2O2 system(nZVC is nanometer zero-valent copper)under neutral conditions,the oxidative degradation effect of RhB in simulated dye wastewater by nZVC/H2O2/polyphosphoric acid(PPA)with RhB as the target pollutant was studied.The results showed that,the RhB degradation rate in nZVC/H2O2 system was 13.49%,and that in nZVC/H2O2/PPA system was 89.29%when reaction time was 60 min.By adding tert butyl alcohol(TBA),it was found that the main species in the system were HO·.The pH had little effect on the oxidation capacity of nZVC/H2O2/PPA system.Meanwhile,the increase of H2O2,PPA and nZVC dosage could promote the degradation of RhB.The degradation reaction followed the second-order reaction kinetics.The addition of PPA could effectively improve the oxidation capacity of nZVC/H2O2 system under neutral conditions and effectively degrade the target pollutants in water.