水解PAN纳米纤维膜对Cu(Ⅱ)离子的吸附性能

Adsorption of Cu(Ⅱ) ions by Hydrolyzed PAN Nanofibers Membrane

静电纺丝法制备的PAN纳米纤维膜(PANNFM)在碱性条件下水解改性,制备水解PAN纳米纤维膜(HPANNFM),将HPANNFM用于重金属Cu(Ⅱ)离子的吸附。运用场发射扫描电镜(FE-SEM)、红外光谱(ATR-FTIR)对改性前后的样品进行表征;考察pH对吸附性能的影响;研究了HPANNFM对Cu(Ⅱ)离子吸附的动力学和等温线。结果表明:其吸附过程的动力学符合二级动力学方程,吸附等温线符合Langmuir吸附模型,对Cu(Ⅱ)离子的饱和吸附量为51.11 mg/g,用1 mol/L的HCl对其进行解吸附,在1 h后解吸附率超过90%。

The electrospinning ployacrylonitrile nanofibers membrane（PANNFM） is hydrolyzed to prepare the hydrolyzed polyacrylonitrile nanofibers membrane（HPANNFM）,and it is used as an adsorbent to remove and recovery copper ions from the aqueous solution.The samples before and after hydrolysis are characterized with FE-SEM and ATR-IR.Experimental results indicate that pseudosecond order reaction model provides the best description of the data.The isothermal data of the HPANNFM can be well described by the Langmuir equation and the Langmuir,monolayer capacity has a mean value of 51.11mg/g.In addition,over 90% of metals are recovered from the metal-load HPANNFM in a 1 mol/L HCl solution after 1 h.