铁酸钴活化过一硫酸盐处理高盐废水中罗丹明B的研究

Treatment of Rhodamine B in High-Salt Wastewater by Cobalt-Ironate Activated Peroxymonosulfate

采用溶胶-凝胶法制备了催化剂铁酸钴(CoFe_(2)O_(4))纳米材料,借助扫描电子显微镜(SEM)和X射线衍射仪(XRD)对催化剂进行了表征。配制了质量浓度10 g/L硫酸钠,50 mg/L的罗丹明模拟废水,开展了铁酸钴活化PMS降解高盐废水中罗丹明B(RhB)的实验。对比了单独投加PMS、CoFe_(2)O_(4)和同时投加PMS/CoFe_(2)O_(4)对RhB的降解效果,探究了PMS投加量、CoFe_(2)O_(4)投加量、初始pH、硫酸钠含量等因素对过一硫酸盐/铁酸钴(PMS/CoFe_(2)O_(4))体系降解RhB效果的影响。结果表明,PMS/CoFe_(2)O_(4)体系降解高盐废水中RhB效果显著;硫酸钠的存在对RhB的降解过程有一定的抑制作用;在PMS投加量0.8 mmol/L、CoFe_(2)O_(4)投加量200 mg/L、反应时间为30 min时,RhB降解率为99.2%。

The catalyst cobalt ferrate(CoFe_(2)O_(4))nanomaterials were prepared by sol-gel method and characterized with the aid of scanning electron microscopy(SEM)and X-ray diffractometer(XRD).A simulated wastewater with sodium sulfate concentration of 10 g/L and rhodamine concentration of 50 mg/L was prepared,and experiments on the degradation of rhodamine B(RhB)in high-salt wastewater by cobalt ironate activated PMS were carried out.The degradation effects of PMS,CoFe_(2)O_(4)alone and PMS/CoFe_(2)O_(4)simultaneously on RhB were compared,and the effects of PMS dosage,CoFe_(2)O_(4)dosage,initial pH,sodium sulfate content and other factors on the degradation effect of cobalt ferrate/peroxymonosulfate(PMS/CoFe_(2)O_(4))system on RhB were investigated.The results showed that the PMS/CoFe_(2)O_(4)system was effective in degrading RhB in high-salt wastewater;the presence of sodium sulfate inhibited the degradation process of RhB;the degradation rate of RhB was 99.2%when the PMS dosage was 0.8 mmol/L,the CoFe_(2)O_(4)dosage was 200 mg/L and the reaction time was 30 min.