【摘要】 通过煅烧-浸渍法制备了铁酸锰和钴共改性生物碳（Co/MnFe₂O₄/Biochar,CMB）,采用扫描电镜（SEM）、X射线能谱仪（EDS）、X射线衍射仪（XRD）、傅里叶红外光谱仪（FTIR）和N₂吸脱附等温仪（BET）对CMB进行形貌观察和结构表征,并用其催化过硫酸氢钾（PMS）降解染料罗丹明6G（Rh 6G）,研究了CMB投加量、PMS投加量、溶液初始pH值、水中常见物质（如Cl^-、HCO₃^-、H₂PO₄^-、HA）对CMB/PMS体系降解Rh 6G的影响。实验结果表明,随着CMB和PMS投加量的增大,Rh 6G降解效率也随之增高。在溶液初始pH在5-9范围内,Rh 6G的降解率可达98%以上。Cl^-、HCO₃^-、H₂PO₄^-、HA对CMB催化PMS降解Rh 6G影响微弱。自由基猝灭反应实验结果证明SO₄·^-、¹O₂和O₂^-·对Rh 6G的降解起主要作用。重复利用实验表明,CMB经过五次循环使用后,降解率仍可达76.7%。更多还原

【Abstract】 Modified biochar（Co/MnFe₂O₄/Biochar,CMB）was prepared by calcination impregnation-process.The morphology and structure of CMB were characterized by SEM,EDS,XRD,FTIR and BET.CMB was used to activate peroxymonosulfate（PMS）to degrade Rhodamine 6G（Rh 6G）.The effects of CMB dosage,PMS dosage,solution initial pH,common ions of waterbody（for example:Cl^-、HCO₃^-、H₂PO₄^-、HA）on the degradation of Rh 6G were studied.Experimental results showed that the greater the dosage of CMB or PMS,the better the degradation efficiency.The degradation rate of Rh 6G could reach more than 98% in the solution initial pH range of 5-9.Cl^-,HCO₃^-,H₂PO₄^-,HA had little effect on the degradation of Rh 6G.The results of free radical quenching experiments indicated that SO₄^-·,¹O₂ and O₂^-·played a major role in the degradation of Rh 6G.Reuse experiments showed that after five cycles of CMB,the degradation rate could still reach 76.7%.更多还原