【摘要】 以市售活性炭、硅藻土和氧化铝小球为载体,考察了负载铁基活性组分对催化臭氧化过程中溴酸盐的控制情况,其中,铁基复合氧化铝小球体现出更好的溴酸盐还原特性和催化剂稳定性,证实催化剂中铁氧化物是溴酸盐得到有效控制的主要活性组分。进一步考察了铁基复合氧化铝小球催化臭氧化处理实际原水过程中对溴酸盐的生成控制,以及反应过程中溶解性有机碳(DOC)的去除情况。结果表明,与单独臭氧化相比,该催化剂既能有效去除水中的溶解性有机物,又能明显抑制溴酸盐的生成,反应50 h,其活性并没有明显下降。催化剂失活主要归因于吸附位点数量的下降,可以通过负载铁氧化物来实现催化剂的再生。更多还原

【Abstract】 Iron oxide supported on commercial active carbon,diatomite and spherical Al2O3 were used as ozonation catalysts for the control of bromate formation during the drinking water treatment process. Iron oxide supported on spherical Al2O3 showed higher activity and stability for the bromate reduction. Moreover,it was confirmed that iron oxide was the main active component within the catalyst. The catalyst was further evaluated by its performance in control of BrO-3 formation and removal of DOC during the catalytic ozonation of Br--containing raw drinking water. Compared with ozonation alone,efficient inhibition of BrO-3 formation and higher DOC removal efficiency were obtained over iron oxide supported on spherical Al2O3 and no obvious loss of activity was observed when it was further used for 50 hours. While the decrease of adsorption capacity was responsible for the catalyst’s deactivation and it could be regenerated by loading iron oxide again.更多还原