氧化铁改性陶瓷滤料制备及在微污染水预处理中的应用  

Surface Modification of New Ceramics and Application Research in the Pretreatment of Light-polluted Water

作　　者：方宏伟 

机构地区：[1]中铁建设集团有限公司,北京100040

出　　处：《武汉理工大学学报》2013年第4期107-111,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(20876122)

摘　　要：通过氧化铁对新型环保陶瓷滤料的表面改性,对微污染原水进行预处理,有效地降低了后续工艺的有机物负荷,达到了提高最终出水水质的目的。用高温加热制备法制备氧化铁/改性陶瓷滤料,确定了涂铁的最佳改性条件,即pH值为7,Fe(NO3)3浓度为2mol/L,焙烧温度为550℃,涂层次数为4次的条件下对COD的去除效果最佳,并且通过与普通滤料进行的对照试验,发现其对COD的去除率提高了6～8倍。用扫描电子显微镜观察改性陶瓷滤料的表面形态,发现氧化铁膜经过高温的烧结已经附在了普通陶瓷滤料的表面,呈细小的颗粒状态,非常有利于提高陶瓷滤料的吸附性能。同时用X射线衍射进行了氧化铁膜的物相分析,发现改性滤料氧化铁涂层有α-Fe2O3与α-FeOOH物质形态存在,有助于对水中有机物质的吸附去除。Using Fe（NO3 ）3 as the modifying agent to modify a new type of porous envfronmental ceramics filter medi- um and pre-treating the micro-polluted water with the modified ceramics filters, the paper has the conclusion that using the modified ceramics filters can reduce organic matter in the following process and enhance the water quality of outflow. The iron oxide/ceramics modified filter medium was prepared by heating vaporization. The best modifying conditions was confirmed, which contains pH value at seven, Fe（NO3）3 with the density of 2 mol/L, roasting temperature at 550 centi- grade, the times of modifying for four times. Compared with the numerical value using ceramics filters, the rate of remo- ving COD was enhanced six to eight times. The surface morphologies of the modified filter medium were observed by SEM, which showed that iron oxide film being fine particle were attached to the ceramics, it is benefit for enhancing ad- sorption capability. The matter species of iron oxide film were analyzed by XRD, which showed that it contains α-Fe2 Oa and α-FeOOH, they are helpful for removing organic matter.

关 键 词：陶瓷滤料 表面改性 氧化铁 微污染水 

分 类 号：X5[环境科学与工程—环境工程]