碳酸钙改性高吸水树脂对铜离子的吸附研究  

Adsorption of copper ion with calcium carbonate modified high water-absorbing resin

作　　者：王农[1,2] 陈利轩[1] 杨利娟[1] 肖蓉[1] 

机构地区：[1]兰州交通大学化学与生物工程学院,甘肃兰州730070 [2]甘肃省植物源生物农药工程技术研究中心,甘肃兰州730070

出　　处：《现代化工》2014年第3期78-81,共4页Modern Chemical Industry

基　　金：甘肃省工程技术研究中心项目(1106NTGA013);甘肃省重大科技专项(1002NKDA025);兰州交通大学"青蓝"人才工程基金资助项目

摘　　要：以丙烯酸(AA)为单体,碳酸钙为改性添加剂,N,N'-亚甲基双丙烯酰胺(NMBA)为交联剂,过硫酸铵(APS)/亚硫酸钠为氧化还原型引发剂,采用水溶液聚合法合成碳酸钙改性高吸水树脂。发现使用改性添加剂碳酸钙能够使改性高吸水树脂的吸附性能明显增强。通过正交实验和单因素实验进行条件优化,得出改性高吸水树脂对重金属铜离子吸附性能最佳的工艺条件为:以158 g丙烯酸为基准,反应温度为55℃,单体质量分数为20%,中和度为75%,改性添加剂质量为8 g,交联剂和引发剂质量分别为单体质量的1.0%和2.0%。在最佳工艺条件下,制备的改性树脂常温下在0.05 mol/L的硫酸铜溶液中吸附铜离子量达到213.7 mg/g。The modified high water-absorbing resin is prepared by aqueous solution polymerization with acrylic acid （AA） as the monomer,calcium carbonate as the modified additives,N,N-methylene double acrylamide （NMBA） as cross-linking agent,ammonium per-sulfate （APS）/sodium sulfite as oxidation reduction type initiator.The results show that the adsorption performance of absorbent resin modified by calcium carbonate is obviously improved.Orthogonal and single factor experiments are used to establish the optimum parameters related to the product preparation.The best process conditions on adsorption properties of the modified resin for heavy metal copper ions are obtained.Using 150 mL acrylic acid as a benchmark,the optimum process conditions are shown as follows：55 ℃ of the reaction temperature,20％the mass fraction of monomer,75％ of the neutralization degree,8 g of modified additive,1.0％ of cross-linking agent and 2.0％ of the initiator.The modified resin prepared under the optimum process conditions can absorb 213.7 mg/g of heavy metal copper ions in the 0.05 mol/L copper sulfate solution at room temperature.

关 键 词：高吸水树脂 丙烯酸 碳酸钙 铜离子 吸附性能 

分 类 号：TQ321[化学工程—合成树脂塑料工业]