聚丙烯酰胺磷酸锆对Pb^(2+)的吸附性质研究  

Study of polyacrylamide zirconium phosphate adsorption properties onto Pb^(2+) ions

作　　者：陈双莉[1] 张彤 党媛 CHEN Shuang-li;ZHANG Tong;DANG Yuan(Department of Chemistry,College of Science,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学理学院化学系,陕西西安710055

出　　处：《应用化工》2019年第3期582-585,共4页Applied Chemical Industry

基　　金：陕西省自然科学基金(2017JQ2007);陕西省教育厅专项基金(16JK1446)

摘　　要：使用溶胶-凝胶法合成聚丙烯酰胺磷酸锆,研究其对Pb^(2+)的吸附行为。结果表明,0.10 g聚丙烯酰胺磷酸锆,加入0.20 g/L Pb^(2+)溶液20.00 mL,24 h时已基本吸附饱和,q_e=18.50 mg/g,η=84.49%。当Pb^(2+)初始浓度增加到0.70 g/L时,吸附容量达到最大,在pH=3.72时吸附容量最大。混合金属溶液吸附实验表明,聚丙烯酰胺磷酸锆对Pb^(2+)具有高的选择性,k_(dPb)/k_(dNi)=23.76,k_(dPb)/k_(dCu)=6.680。吸附速率符合准二阶动力学方程。吸附等温线符合Langmuir吸附模型和Freundlich吸附模型。Polyacrylamide zirconium phosphate was synthesized by sol-gel method to selectively remove heavy metal ions from water.The results showed that q e=18.50 mg/g,η=84.49% when 0.10 g of polyacrylamide zirconium phosphate,adding 20.00 mL of 0.20 g/L Pb^2+ solution,the basic adsorption saturation at 24 h,the adsorption capacity was the highest when the initial concentratioin of Pb^2+ is increased to 0.70 g/L,and the adsorption capacity was the highest at pH=3.72.Adsorption experiments of mixed metal solution showed that polyacrylamide zirconium phosphate had high selectivity to Pb^2+,k dPb /k dNi =23.76,k dPb /k dCu =6.680.The adsorption rate was in accordance with the quasi-second-order kinetic equation .The adsorption isotherms conform to the Langmuir adsorption model and the Freundlich adsorption model.

关 键 词：聚丙烯酰胺磷酸锆 PB^2+ 吸附 

分 类 号：TQ028.14[化学工程]