摘要
以聚苯胺为碳源,通过高温热解和KOH化学活化法制备了多孔聚苯胺碳纳米管(PPN),将其用于吸附罗丹明B(RhB)。PPN具有大的比表面积(2055.30 m^2/g)和孔体积(1.32 cm^3/g),对RhB的吸附容量高达433.30 mg/g。将Langmuir和Freundlich等温吸附模型用于研究PPN吸附RhB过程。实验结果表明,吸附模型更符合Langmuir等温吸附模型,属于均相表面的单分子层可逆吸附。准一级动力学、二级动力学和内颗粒扩散模型研究吸附动力学过程,PPN对RhB的吸附符合准二级动力学模型。PPN用于RhB吸附,在30次循环使用后,仍然表现出优异的回收率(86.9%),表明PPN是一种高效并且可以循环使用的吸附材料,具有用于废水中移除RhB的潜力。
Using polyaniline as carbon source,porous polyaniline nanotube(PPN)was prepared via high-temperature pyrolysis and further KOH chemical activation method,which was employed in the adsorption of Rhodamine B(RhB).PPN adsorbent exhibited a large specific surface area(2055.30 m^2/g)and pore volume(1.32 cm^3/g),and its adsorption capacity for RhB was as high as 433.30 mg/g.Langmuir and Freundlich isothermal adsorption models were used to investigate the adsorption behavior of RhB by PPN.The results were more consistent with the Langmuir isotherm adsorption model,which was ascribed as reversible adsorption of monolayer on homogeneous surface.Three kinetics models including pseudo-first-model,pseudo-second-model and internal particle diffusion model were employed to investigate the adsorption process of RhB.The adsorption behavior of RhB by PPN was in accordance with the pseudo-second-model.After 30 cycles of use,PPN still showed a good extraction recovery(86.9%),indicating that PPN was an efficient and recyclable adsorbent with the expectable potential to remove RhB from wastewater.
作者
赵德
陈国举
李亦婧
卢晓锋
牛盼红
郭勇
ZHAO De;CHEN Guo-jv;LI Yi-jing;LU Xiao-feng;NIU Pan-hong;GUO Yong(State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization,Jinchuan Group Co.,Ltd.,Jinchang 737100,China;Key Laboratory of Chemistry of Northwestern Plant Resource,Key Laboratory for Natural Medicine of Gansu Province,Lanzhou Institute of Chemical Physics,Chinese Academy of Science,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《化学试剂》
CAS
北大核心
2020年第7期791-796,共6页
Chemical Reagents
基金
国家自然科学基金资助项目(21575149)
镍钴资源综合利用国家重点实验室开放基金资助项目(2019-620001000141)。
关键词
多孔碳纳米管
罗丹明B
固相萃取
聚苯胺
循环利用
吸附剂
porous carbon nanotube
Rhodamine B
solid phase extraction
polyaniline
regeneration
adsorbent
