采用浸渍-煅烧法制备Cu/MgAlO,利用扫描电镜、傅里叶红外光谱仪、比表面积测定仪、X射线衍射仪对其进行表征,并用Cu/MgAlO催化过硫酸氢盐(PMS)对橙黄Ⅱ进行催化降解,探索橙黄Ⅱ浓度、Cu/MgAlO投加量、PMS投加量、溶液初始pH、温度、常见离子和水质条件的影响。结果表明:当溶液初始pH为7,温度为25℃,Cu/MgAlO和PMS的浓度分别为0.1g/L和0.5mmol/L时,20mg/L橙黄Ⅱ反应30min后降解率可达94.4%。H2PO-4对降解有抑制,而Cl-促进降解。自由基猝灭实验结果表明,SO·-4在橙黄Ⅱ降解中贡献最大。
Cu/MgAlO was prepared by impregnation and calcination method.The catalyst was characterized by scanning electron microscopy (SEM),fourier transform infrared spectroscopy (FT-IR),specific surface area analyzer (BET) and X-ray diffraction (XRD).Cu/MgAlO was used to catalyze peroxymonosulfate(PMS) for the degradation of orange Ⅱ.The effects of concentration of orange Ⅱ,the dosage of Cu/MgAlO and PMS,the solution initial pH value,temperature,common ions and water matrix on the degradation were investigated.Results showed that under conditions such as solution initial pH value 7,0.1g/L Cu/MgAlO,0.5mmol/L PMS,the degradation efficiency of 20g/L Orange Ⅱ could reach 94.4% within 30min at 25℃.H2PO-4 had inhibitory effect on the degradation while Cl- could promote the degradation.Quenching experiments showed that SO·-4 played leading role in the oxidation of orange Ⅱ.
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基金资助
福建省自然科学基金项目(2020J01914和2020J05210);莆田学院大学生创新创业训练项目(201911498076和X202011498015)
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