作　　者： ; ; ;

机构地区： 北京林业大学

出　　处： 《环境工程学报》 2015年第2期621-626,共6页

摘　　要： 采用不同的表面改性方法(去矿化处理、氧化改性、碱改性和还原改性)对污泥基活性炭(SCAC)进行处理,分别获得了表面金属含量低、碱位低、碱性官能团含量高及Lewis碱含量高的4种改性SCAC(SCAC-D、SCAC-S、SCAC-OH和SCAC-N),对比考察了改性前后SCAC催化臭氧氧化去除布洛芬(IBP)的效能,并探讨了SCAC催化臭氧氧化反应的主要活性位点。结果表明,5种SCAC催化活性顺序为:SCAC-N>SCAC-OH>SCAC>SCAC-S>SCAC-D;金属组分减少会直接影响SCAC的催化活性,碱位减少对其催化活性的影响相对较弱,说明SCAC表面较为丰富的金属组分是其催化臭氧氧化反应的主要活性位点;增加SCAC表面碱位(Lewis碱和碱性官能团),减少表面酸性官能团有助于提高其催化活性。 Four different methods,including demineralization treatment,oxidation modification,alkali modification and reduction modification,were used to modify the sludge-corncob based activated carbon(SCAC)in order to obtain four modified SCACs(SCAC-D,SCAC-S,SCAC-OH,SCAC-N) with low content of surface metal components,low content of basic sites,high content of basic groups,high content of Lewis bases,respectively.The removal efficiencies of ibuprofen(IBP) during catalytic ozonation process with unmodified and modified SCACs were investigated in this study.And the active sites of SCACs in these processes were determined.The results showed that the catalytic activities of five kinds SCACs were in the following order:SCAC-N > SCACOH > SCAC > SCAC-S > SCAC-D.The reduction of metal components significantly affects the catalytic activity of SCAC,but the reduction of basic sites has less influence on the catalytic activity of SCAC,indicating that comparatively abundant surface metal components were the main active sites in catalytic ozonation process.Increasing surface basic sites(Lewis bases and basic groups) and reducing surface acid groups contribute to improve the catalytic activity of SCAC.

关 键 词： 污泥基活性炭 催化臭氧氧化 改性处理 活性位点 布洛芬

领　　域： [环境科学与工程]