二元金属复合氧化物组份间相互作用对砷吸附性能与机制的影响

项目名称： 二元金属复合氧化物组份间相互作用对砷吸附性能与机制的影响

项目编号： No.51478457

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 其他

项目作者： 张高生

作者单位： 中国科学院烟台海岸带研究所

项目金额： 86万元

中文摘要： 砷对人体健康危害极大，如何高效、经济地去除饮用水中砷污染物始终是国内外研究的重点。吸附是最可行的一种除砷方法，新型金属复合氧化物吸附剂的开发，是该研究领域的前沿与热点。金属复合氧化物组份间相互作用可影响其晶型、形貌结构、表面元素分布及表面电荷等，进而影响其砷吸附性能与机制。深入认识这种相互作用对砷吸附性能与机制的影响，对新型金属复合氧化物除砷吸附剂的开发有重要指导作用。而到目前为止，国内外相关研究很少，且不够深入。基于此，本项目以具广泛代表性的铁铜、铁铝、铁钛及铁锰四个二元金属复合氧化物体系为研究对象，分别采用机械混合、共沉淀、溶胶凝胶及水热法，合成系列组份间相互作用不同的金属复合氧化物，通过批式吸附实验，结合表面滴定、红外、比表面仪、同步辐射等技术，系统、深入地研究复合氧化物组份间相互作用与砷吸附特性及机制间的内在关系，揭示组份间相互作用对金属复合氧化物砷吸附特性及机制的影响规律。

中文关键词： 砷；二元金属复合氧化物；饮用水；吸附；相互作用

英文摘要： Exposure to arsenic can cause huge adverse effects on human health.Thus, efficient and economical removal of arsenic from drinking water has always been attracting attention at home and abroad. Adsorption is believed to be one of the most simply-operated, economical and feasible alternatives for arsenic removal.Recentally,the development of novel binary metal oxide adsorbents has gained increasing concerns.Interaction between component oxides can influence the crystallinity, morphology, surface element distribution and surface charge of the formed metal composite oxides; and then affect their arsenic adsorption properties and mechanisms.Therefore,it is very essential to comprhensively understand the effect of component oxides interaction on arsenic adsorption properties and mechanisms, since this will provide meaningful insight and inspiration to the development of novel metal oxide adsorbents. However, up to now, no systematical and thorough research has been reported at home and abroad. Threrfore, four typical bianry metal oxides (Fe-Cu, Fe-Al, Fe-Ti, and Fe-Mn binary oxides) are chosen as model objecitves in this project, which will be synthesized through differernt methods including physical mixing, co-precipitation, sol-gel process, and hydrothermal reaciton. The difference in the interaciton between component oxides of the synthesized binary oxides will be determined by XRD and Mossbauer spectroscopy.The relationship between the component oxides interaction and arsenic adsorption properties and mechanisms will be sysmetacilly investigated using batch adsorption experiemnts combined with various characterization techniques such as titration, BET measurement, FTIR, TEM, and XAS, to elucidate how the interaciton between componet oxides influences the arsenic adsorption performance and mechanim of binary metal oxides.

英文关键词： Arsenic;Binary metal oxide;Drinking water;Adsorption;Interaction