磷酸根离子和钴离子与针铁矿表面相互作用机制研究

项目名称： 磷酸根离子和钴离子与针铁矿表面相互作用机制研究

项目编号： No.21203050

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 郭志强

作者单位： 合肥工业大学

项目金额： 25万元

中文摘要： 伴随着工农业生产的快速发展，水体富营养化和重金属复合污染日益严重。因此，研究磷酸根离子（富营养化的限制因子）和钴离子（一种常见的重金属离子）与矿物表面作用的相互影响具有重要的现实意义。本项目拟采用批实验方法研究不同环境条件（pH值、离子强度、平衡时间、温度）对磷酸根离子/钴离子与针铁矿作用的影响。通过分析二重体系的结果，制定合适的实验条件，采用批实验方法着重研究pH值和加入次序对磷酸根离子、钴离子和针铁矿三重体系相互作用的影响，结合ATR-FTIR和XPS等光谱技术确定磷酸根离子和钴离子的微观结构和作用机理。项目预期将从宏观和微观两个层面阐明磷酸根离子和钴离子与针铁矿作用的相互影响机制，揭示磷酸根离子和钴离子的化学形态随pH值和加入次序的变化规律。研究成果对于我们制定有效可行的方法来降低水体-陆地污染具有重要的现实指导意义。

中文关键词： 磷酸根离子；钴离子；复合污染；相互作用；机理

英文摘要： Along with the rapid development of industrial and agricultural production, combined pollution caused by eutrophication and heavy metals is increasingly serious. Therefore, to study the mutual effects of phosphate ions (the limiting factor of eutrophication) and cobalt ions (one of common heavy metal ions) on their interaction with goethite surface has important practical significance. In this work, batch technique is going to be adapted to investigate the effects of pH, ionic strength, aging time and temperature on interaction of phosphate/cobalt ions with goethite surface. According to the experimental results above in binary system, appropriate experimental conditions will be established to better study the effects of pH and addition sequences on interaction of phosphate with cobalt ions on goethite surface in ternary system. Besides, spectrum characterization techniques (ATR-FTIR and XPS) will be used to determine the corresponding microstructure and mechanisms. The project is expected to clarify two main issues from both the macro and micro perspectives: (1) the correlative mechanisms of interaction of phosphate ions with cobalt ions at goethite-water interfaces; and (2) the mechanisms underlying the changes of chemical forms of phosphate and cobalt ions as a function of pH and addition sequences. The prosp

英文关键词： Phosphate anion；Cobalt ion；Combined pollution；Interaction；Mechanism