水溶液体系中高岭石吸附Cu^(2+)的研究

Studying on Cu^(2+)sorption of kaolinite in aqueous solution system

研究了溶液浓度、pH值、交换吸附时间、磁感应强度和磁场处理时间对高岭石吸附重金属离子Cu2+的影响作用。实验结果及分析表明,影响高岭石对Cu2+吸附的因素有:①在一定条件下,增加吸附作用时间,吸附量随之缓慢递增,最佳吸附时间是40~50 min;②改变溶液中初始浓度,其吸附交换等温线呈S形,属于二级吸附;③溶液的pH值在2~5之间增加时,吸附量也随之直线增加。指出磁场作用对低浓度的Cu2+的吸附量有着显著的影响,主要因素有磁场强度、磁化时间和磁化对象。

The Cu^2 ＋ sorption influence of solution concentration, pH value, absorption time, and intensity of magnetic induction on the capability of kaolinite were studied. The result indicates that the important influencing factors are as follows ： adsorption quantity increases with the adsorption time under certain conditions, and the favorable time is 40 - 50 rain; the adsorption isothermal is of S-type when the initial concentration of solution changes, which sho adsorption; adsorption quantity increases with pH linearly if pH is in a range of 2 - 5. It is presented of magnetic field on the adsorption quantity of Cu^2 ＋ is remarkable, and the influencing factors inclu strength, magnetization time and objects. ws a second-order that the influence de magnetic field