摘要
以酶解木质素和吡咯单体为原料,通过原位聚合法制备了木质素-聚吡咯(EHL-PPY)复合纳米粒子。而后以银离子为吸附质,系统地研究了EHL-PPY复合纳米粒子的银离子吸附性能,考察了吸附剂浓度,吸附时间和银离子初始浓度对吸附容量和吸附率的影响。在35℃时,该复合纳米粒子对银离子的饱和吸附容量为882.0 mg/g,吸附完成后,银离子被还原为直径为22~56 nm的单质银颗粒。研究表明,EHL-PPY复合纳米粒子可作为低成本银离子吸附剂使用。
Lignin-polypyrrole nanocomposite particles(EHL-PPY) were prepared via an in-situ polymerization of pyrrole monomers in the existence of enzyme hydrolysis lignin. Adsorption property of silver ions onto EHL-PPY nanocomposite particles was investigated through a batch adsorption technique. Effects of adsorbent concentration,adsorption time and initial silver ion concentration on the adsorption were examined. The results show that the maximal adsorption capacity of silver ions onto the EHL-PPY nanocomposite particles reaches 882. 0 mg/g at 35 ℃. After adsorption,the product of nanocomposite patticles was characterized by TEM and XRD. It is found that the silver ions are reduced to silver nanoparticles with the mean diameters of 22 ~ 56 nm after adsoption. This result indicates that EHL-PPY nanocomposite particles possess reactive adsorbability of silver ions. Therefore,the EHL-PPY nanocomposite particles can be effectively used as an adsorbent for removal and recovery of silver ions from waste water.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第2期130-134,共5页
Polymer Materials Science & Engineering
基金
福建省自然科学基金资助项目(2012J01201)
关键词
木质素
聚吡咯
复合物
银离子
吸附
lignin
polypyrrole
nanocomposite
silver ion
adsorption
