新型磁性Fe/Mn纳米复合材料对水中铅离子的去除  

Effect of magnetic Fe/Mn nanocomposites on the removal of lead ion in the aqueous solution

作　　者：赵志伟[1] 何皎洁[1] 刘杰[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2012年第8期27-30,共4页Journal of Harbin Institute of Technology

基　　金：国家"十一五"水体污染控制与治理科技重大专项(2008ZX07421);天津市水质科学与技术重点实验室开放研究基金资助项目

摘　　要：为了有效去除水中的铅离子,实验制备以MnO2为吸附表面的磁性Fe/Mn纳米复合吸附剂,并进行了吸附实验研究,分析pH、温度等参数对吸附的影响.结果发现,从298 K Langmuir等温吸附曲线可以计算出Fe/Mn复合吸附剂对Pb2+的饱和吸附量(Q0=118.06 mg/L).复合吸附剂对Pb2+的吸附总量正比于pH(1.5～5)和温度(303～323 K).在研究纳米复合材料对铅离子的吸附动力学实验中发现,纳米复合材料和铅离子之间的吸附动力学符合假二级模型,通过相关热力学研究计算得到纳米材料和铅离子之间为吸热反应.In this paper,magnetic Fe/Mn nanocomposites were synthesized for the removal of Pb2＋ from solution.The adsorption capacity and the influence factors such as pH and temperature were analyzed.The results showed that the maximum adsorption capacity（Q0） of the sorbents towards Pb2＋was 118.06 mg/L according to the Langmuir isotherms（298 K）.The Pb2＋ removal capacity of the adsorbents increased with the increase of pH（1.5-5） and temperature（303-323 K）.In addition,the kinetic adsorption could be fitted by the pseudo-second-order model equation.At last,the thermodynamics of Pb2＋ was studied at various temperature and the thermodynamic parameters were given which confirmed that the adsorption was endothermic reaction.

关 键 词：磁性Fe/Mn纳米复合材料 离子交换 PB2+ 吸附 

分 类 号：TB383[一般工业技术—材料科学与工程]