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电化学(中英文) ›› 2015, Vol. 21 ›› Issue (4): 344-352.  doi: 10.13208/j.electrochem.150210

• 研究论文 • 上一篇    下一篇

电化学法控制聚吡咯/α-磷酸锆/碳毡电极去除水中低浓度铅离子

陈如意1,张朋乐1,廖森梁2,李馨然1,王忠德1,郝晓刚1*   

  1. 1. 太原理工大学化学工程系,山西 太原 030024;2. 广东省国家模具产品质量监督检验中心,东莞市质量监督检测中心,广东 东莞 523808
  • 收稿日期:2015-02-10 修回日期:2015-04-22 出版日期:2015-08-28 发布日期:2015-08-28
  • 通讯作者: 郝晓刚 E-mail:xghao@tyut.edu.cn
  • 基金资助:

    国家自然科学基金项目(No. 21276173,No. 21476156,No. 21306123)资助

Electrochemical Removal of Low Concentration Pb(II) from Aqueous Solution based on PPy/α-ZrP/PTCF Electrode

CHEN Ru-yi1, ZHANG Peng-le1, LIAO Sen-liang2, WANG Zhong-de1, HAO Xiao-gang1*   

  1. 1. Department of Chemical Eegineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; 2. Guangdong Dongguan Quality Supervision Testing Center (National Mould Products Quality Supervision Inspection Center), Dongguan 523808, Guangdong, China
  • Received:2015-02-10 Revised:2015-04-22 Published:2015-08-28 Online:2015-08-28
  • Contact: HAO Xiao-gang E-mail:xghao@tyut.edu.cn

摘要: 采用循环伏安法在水相中制备了电活性聚吡咯/α-磷酸锆(PPy/α-ZrP)有机-无机杂化膜,通过FT-IR、XRD、XPS对电活性PPy/α-ZrP杂化膜进行表征. 将制备在碳毡(PTCF)基体上的电活性PPy/α-ZrP膜电极(聚吡咯/α-磷酸锆/碳毡电极,PPy/α-ZrP/PTCF)用于电控离子交换去除废水中的铅离子. 通过对PPy/α-ZrP膜电极施加氧化还原电位来调节电活性组分PPy/α-ZrP的氧化还原状态,使废水中的铅离子能够快速置入和释放. 在10 mg·L-1的Pb(II)水溶液中,膜电极对铅离子的去除效率为单纯离子交换的1.8倍,膜电极的吸附量为单纯离子交换的2倍,表明该膜电极在电控离子交换条件下对铅离子具有较强的去除效率和更高的吸附容量. 吸附过程符合准二级动力学模型,电控离子交换的准二级吸附速率常数k2(0.6142 g·mg-1·h-1)明显高于单纯离子交换(0.2632 g·mg-1·h-1).

关键词: 电控离子交换;聚吡咯/&alpha, -磷酸锆/碳毡电极;吸附选择性;铅离子;吸附动力学

Abstract: A novel organic-inorganic hybrid film consisting of polypyrrole/α-zirconium phosphate (PPy/α-ZrP) was prepared in an aqueous phase by cyclic voltammetry method. It was proved by FT-IR, XRD and XPS characterizations that the electroactive PPy/α-ZrP hybrid film was synthesized successfully. The PPy/α-ZrP film electrode prepared on a porous three-dimensional carbon felt (PTCF) was used for removal of a low concentration of Pb(II) ions from an aqueous solution by electrochemically switched ion exchange (ESIX). A quick uptake and release rate of Pb(II) onto the film electrode was obtained by adjusting redox state of the hybrid film. The removal efficiency and adsorption capacity of the PPy/α-ZrP/PTCF electrode for Pb(II) were about 1.8 and 2 times higher than those of traditional ion exchange (IX), respectively. Thus, the film electrode showed higher removal efficiency and adsorption capacity for Pb(II) by ESIX. The adsorption kinetics of Pb(II) could be described properly by the pseudo-second-order kinetic mode. A greater pseudo-second-order rate constant of 0.6142 g·mg-1·h-1 was achieved by ESIX, which was higher than that of 0.2632 g·mg-1·h-1 by IX.

Key words: electrochemically switched ion exchange, polypyrrole/α-zirconium phosphate/carbon felt electrode, adsorption selectivity, Pb(II), adsorption kinetics

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