絮凝学研究的新领域——具有重金属捕集功能的高分子絮凝剂

絮凝是水质净化的重要方法之一.絮凝剂的作用对象主要是水中由不溶性物质形成的憎液溶胶及悬浮颗粒.近年来的研究发现,将重金属离子的某些强配位基团通过化学反应连接到高分子絮凝剂分子上能赋予原有高分子絮凝剂捕集水中溶解性重金属离子的功能,因此制备出具有去除重金属离子功能的高分子絮凝剂.研究表明,这类高分子絮凝剂用于水处理时表现出显著的优点,如去除效率高、沉降速度快,分离效果好,尤其适合于处理重金属离子与浊度共存的体系,显示出很好的研究及应用前景.本项研究拓展了絮凝剂作用对象的种类,开创了水处理絮凝学研究的新领域.

New research area of flocculation in water treatment-macromolecule flocculant with the function of trapping heavy metal

Flocculation is one of the most important methods of water treatment. The targets of flocculant's action are the hydrophobic colloids and suspended particles which consist of insoluble substances. In recent years it is found that some macromolecule flocculants are able to trap soluble heavy metal ions in aqueous solution if some strong ligands for heavy metals are linked to their molecules by chemical reactions, thus the macromolecule flocculants with the function of trapping heavy metals have been prepared according to this mechanism. The experiments prove that this kind of flocculant has many remarkable advantages, for example, high removal efficiency, fast sedimentation velocity, good separation effect, and more applicability to the treatment of the water which contains both turbidity and heavy metals, showing good application potential. This study extends the kinds of target of flocculant's action and the research area of flocculation in water treatment.