纳米零价铁/玉米淀粉的制备及其对Pb^(2+)的吸附  

Preparation of Nano Zero-valent Iron/Cornstarch and Adsorption of Pb^(2+)

作　　者：高国振[1] 李金轩[1] 李小燕[1] 李寻[1] 王长柏[1] 贺彩婷[1] 

机构地区：[1]东华理工大学核资源与环境省部共建国家重点实验室培育基地,江西南昌330013

出　　处：《化工环保》2014年第4期376-379,共4页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金项目(11205030;41201500);核资源与环境省部共建国家重点实验室项目(NRE1320);放射性地质勘探与技术国防重点学科实验室项目(2011RGET06;REGT1220)

摘　　要：以玉米淀粉为载体,采用液相还原法制备纳米零价铁/玉米淀粉,并用于溶液中Pb2+的去除。采用SEM技术对吸附材料进行了表征。考察了溶液pH、纳米零价铁/玉米淀粉加入量、初始Pb2+质量浓度、反应时间等因素对Pb2+吸附效果的影响。表征结果显示,纳米零价铁/玉米淀粉球体间主要呈链状连接,不仅保持了纳米零价铁的特性,且颗粒的团聚现象明显减少。实验结果表明,在溶液pH 7.0、纳米零价铁/玉米淀粉加入量0.8 g/L、初始Pb2+质量浓度50 mg/L、反应时间60 min的条件下,纳米零价铁/玉米淀粉对Pb2+具有较好的吸附效果,Pb2+去除率为93.17%、吸附量为47.27 mg/g。Nano zero-valent iron/cornstarch（NZVI/Cornstarch） for removal of Pb2＋ from solution was prepared by liquid phase reduction method using cornstarch as carrier,and characterized by SEM. The factors affecting Pb2＋ adsorption were studied. The characterization results show that the NZVI/Cornstarch balls are interconnected in chain shape,which not only retains the characteristics of NZVI,but also reduces the aggregation of the pellets signifi cantly. The experimental results show that under the conditions of solution pH 7.0,NZVI/Cornstarch dosage 0.8 g/L,initial Pb2＋ mass concentration 50 mg/L and reaction time 60 min, the NZVI/Cornstarch has an excellent adsorption effect on Pb2＋,the Pb2＋ removal rate and the adsorption capacity are 93.17% and 47.27 mg/g respectively.

关 键 词：纳米零价铁 玉米淀粉 负载 铅离子 吸附剂 

分 类 号：TQ138.1[化学工程—无机化工]