海泡石/黄原胶复合絮凝剂的制备及应用研究

Preparation and application of sepiolite/xanthan gum compound flocculant

以过硫酸钾为引发剂,使丙烯酸/丙烯酰胺在黄原胶(XG)分子链上接枝聚合并复合海泡石纤维制备复合絮凝剂。研究了反应条件对含油废水COD去除率及浊度去除率的影响,利用红外光谱(FTIR)对接枝产物进行表征。实验结果表明,最佳合成条件为:m(丙烯酸/丙烯酰胺)∶m(黄原胶)=8∶1,引发剂、交联剂与黄原胶质量比分别为0.02,0.006,m(海泡石)∶m(黄原胶)=1∶2,反应温度60℃,用该絮凝剂处理含油废水,COD去除率和浊度去除率分别达到88.2%和95.6%。

A compound flocculant was prepared using acrylic acid/acrylamide grafted polymerization onto the xanthan gum（XG） with sepiolite fiber, initiated with potassium persulfate. The influence of the reaction conditions on COD removal rate and turbidity removal rate were discussed. The compound floceulant structure was characterized by infrared spectroscopy （FTIR）. The experimental results showed that the optimum condition of grafting reaction was that mass ratio of AA/AM to XG was 8 ： 1, the mass ratio of the initiator and the crosslinking reagent to xanthan gum was 0.02 and 0.006 respectively, mass ratio of sepiolite to XG was 1 ： 2 ,the reaction temperature was 60℃. Using this flocculant to treat oil wastewater, the COD removal rate and turbidity removal rate were 88.2% and 95.6% respectively.