作　　者： ; ; ; ; (王笑迪）; (卢筱佳）;

机构地区： 长安大学公路学院

出　　处： 《应用化工》 2015年第8期1386-1390,共5页

摘　　要： 以聚氨酯泡塑为骨架,以双硫腙为接枝螯合基团,经Mannich反应,合成一种具有螯合重金属离子性能的新型材料,即双硫腙接枝聚氨酯泡塑吸附材料。依据含铅废水的水体特征以及合成的双硫腙接枝聚氨酯泡塑材料的性质,对含铅模拟废水进行吸附处理实验,探索了该泡塑材料在处理含铅废水时的最佳工艺条件,并且对其热力学及动力学机理进行了探讨。结果表明,双硫腙接枝聚氨酯泡塑材料对含铅废水有不错的吸附效果。该泡塑材料吸附铅的最佳条件:在温度20℃、p H=6时,0.3 g双硫腙接枝螯合泡塑处理5 mg/L的含铅废水50 m L,反应时间4 h后铅去除率能达到99.99%。此外,对螯合泡塑的合成机理以及吸附机理进行了理论上的分析和解释,指出了按照Mannich反应机理制备出螯合泡塑,基于在聚氨酯泡塑上引入具有螯合作用的基团双硫腙,使得该螯合泡塑具有捕捉Pb2+螯合作用。 According to the Mannich-Reaction, a kind of chelating foam grafted with dithizone was prepared from polyurethane（PU）, formaldehyde and dithizone . Based on the analysis and generalization of waste water with Pb^2＋ and the property of the chelating PU foam, the optimum adsorption condition while dispose above-mentioned waste water was investigated. The result indicated the chelating PU foam can be used to process waste water with Pb^2＋. The optimum adsorption condition while dispose above-mentioned waste water were below： at 20 ℃, pH = 6,0.3 g of the chelating foam grafted with dithizone process 5 mg/L 50 mL waste-water with Pb^2＋ for 4 h, and then 99.99% of Pb^2＋ was removed. In addition the analysis and explanation of the chelating mechanism were studied as well. And pointed out that according to the Mannich-Reaction, this kind of chelating foam was prepared and due to the chelate functional group-dithizone-grafted on PU, the chelating foam are able to capture Pb^2＋.

关 键 词： 含铅废水 聚氨酯泡塑 双硫腙 除铅

领　　域： [化学工程] [化学工程]