摘要
应用紫外—可见光分光光度计和红外光谱仪等测试手段,较为详细地研究了菱铁矿、褐铁矿和镜铁矿的选择性絮凝作用机理。结果表明,在高pH值的条件下,阴离子聚丙烯酰胺主要靠氢键和化学键的作用吸附在氧化铁矿表面,是以化学吸附为主的单分子层吸附,桥联模式为矿粒/聚合物—矿粒;在有高模数水玻璃M_(3-1)存在的条件下,阴离子聚丙烯酰胺与铁矿物表面的作用机理不同于与石英表面的作用机理。
The selectivity flocculation mechanism of microfine iron oxides namely the
siderite, the limonite and the specularite is studied with the scanning electron
microscopy and infrared spectroscopy. On condition of high pH value, the adsorption
of anion polyacrylamide on the surface of iron oxide is caused by hydrogen bond and
chemical bond, of course, the chemical adsorption is monolayer and the model of
bridging-particles is particle/polymer-particle. The depression action of sodium
silicate M_(3-1) in the flocculation process for quartz was also studied.
关键词
磁铁矿
絮凝
红外光谱
magnetite
selectivity
flocculation / ultravidet spectrum
infrared spectrum
