作　　者： ; ; ;

机构地区： 广西师范大学环境与资源学院资源与环境学系

出　　处： 《安全与环境学报》 2004年第4期20-22,共3页

摘　　要： 采用浮选方法 ,以结晶紫作为阳离子染料模型 ,以十二烷基苯磺酸钠做捕集剂 ,对水溶液中染料进行去除处理。研究了十二烷基苯磺酸钠的用量、染料浓度、浮选时间、p H值等对浮选效率的影响 ,优化了浮选条件 ,并对方法的机理进行了初步的探讨。该法所用装置简单 ,试剂价廉 ,操作简便 ,去除率高 。 This paper has presented a new flotation method developed by the author for processing cationic dye wastewater. First of all, the author made a detailed study on the influence of some factors on the flotation efficiency,such as the effect of varying the pH from 3 to 10 on the flotation efficiency, and the effect of adding ethanol on the change of the flotation rate, etc. However, it was proved that the change of CV concentration has little effect on it. The whole study has been done by taking the anionic surfactant, sodium dodecylbenzenesulfonate as the model, which is readily reacted with the crystal violet cation to form a colloidal precipitate (sublate). In our experiment, SDBS has to be present in at least 1.3 molar ratio to CV with an excess of SDBS required to produce a stable foam layer. The experiment result shows that adding a small amount of ethanol (0.05%—1.0%) to the solution may prevent the coalescence of tiny bubbles and increase the flotation rate. Nevertheless, the coexisting ions, such as SO^(2-)_4, Cl^-, NO^-_3, PO^(3-)_4, Ca^(2+), Mg^(2+), Al^(3+) and Fe^(3+) had little influence on flotation efficiency. The flotation rate should have reached 99.7% under the optimum conditions. Being fast, simple and cost-effective, he given method will be beneficial for processing cationic dye wastewater.

关 键 词： 环境工程 浮选法 阳离子染料 废水处理

领　　域： [环境科学与工程]