Study on the Adsorption Performance of Conjugated Microporous Polyaniline for Cationic and Anionic Dyes in Wastewater

WU Xiaoxi; WANG Yubing; HE Bianyan; YAN Wei

doi:10.7652/xjtuxb202511002

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Study on the Adsorption Performance of Conjugated Microporous Polyaniline for Cationic and Anionic Dyes in Wastewater

Special Topic Pollution Control and Resource Utilization in the“Dual Carbon”Context | 更新时间：2025-11-11

- Study on the Adsorption Performance of Conjugated Microporous Polyaniline for Cationic and Anionic Dyes in Wastewater
- Journal of Xi'an Jiaotong University Vol. 59, Issue 11, Pages: 19-31(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202511002
  CLC： X826
- Received：27 March 2025，
  
  Published：10 November 2025
- 稿件说明：
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WU Xiaoxi, WANG Yubing, HE Bianyan, et al. Study on the Adsorption Performance of Conjugated Microporous Polyaniline for Cationic and Anionic Dyes in Wastewater[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 19-31.
DOI：

WU Xiaoxi, WANG Yubing, HE Bianyan, et al. Study on the Adsorption Performance of Conjugated Microporous Polyaniline for Cationic and Anionic Dyes in Wastewater[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 19-31. DOI： 10.7652/xjtuxb202511002.

摘要

针对目前多数吸附剂具有较高选择性的局限，通过布赫瓦尔德-哈特维希偶联反应，合成了一类通用的吸附剂——共轭微孔聚苯胺（CMPAs）。首先，研究该系列吸附剂对阴离子染料酸性红G（ARG）和阳离子染料亚甲基蓝（MB）的吸附效果；然后，探讨了pH、吸附时间、初始浓度和温度等因素对吸附性能的影响，并通过吸附前后的表征分析探究吸附机理；最后，研究了CMPAs对混合染料的吸附效果。结果表明：CMPAs系列吸附剂对ARG和MB均有优异的吸附性能，吸附能力随溶液pH变化，吸附行为符合准二级动力学模型和Freundlich模型；吸附剂的亚胺氮含量是决定吸附容量的关键因素，比表面积和孔径分布通过影响活性位点可及性和分子传质效率产生协同效应；在318K时，吸附剂对ARG和MB的最大吸附量分别为1416、235mg·g

-1

，其主要依靠静电、氢键和π-π相互作用协同吸附染料；吸附剂在混合染料体系中具有同时去除阴离子和阳离子染料的普遍适用性；经过10次循环吸附后，其吸附效率仍保持在99%以上，显示出良好的稳定性和重复使用性。

Abstract

To address the limitations of most current adsorbents that exhibit high selectivity

a novel universal adsorbent—conjugated microporous polyanilines (CMPAs) —is synthesized via Buchwald-Hartwig coupling reactions. First

the adsorption performance of this series of adsorbents is investigated for anionic dye acid red G (ARG) and cationic dye Methylene Blue (MB).Subsequently

the effects of pH

adsorption time

initial concentration

and temperature on adsorption performance are systematically examined

and the adsorption mechanism is elucidated through pre-and post-adsorption characterization. Finally

the adsorption efficiency of CMPAs on mixed dyes is evaluated. Results demonstrate that the CMPAs exhibit excellent adsorption performance for both ARG and MB

with adsorption capacity varying with solution pH. The adsorption behavior follows pseudo-second-order kinetics and the Freundlich model. Comparative analysis reveals that the imine nitrogen content of the adsorbent is the key determinant of adsorption capacity

while the specific surface area and pore size distribution create a synergistic effect by influencing the accessibility of active sites andmolecular mass transfer efficiency. At 318K

the maximum adsorption capacities reach 1416mg·g

-1

for ARG and 235mg·g

-1

for MB

primarily relying on electrostatic interactions

hydrogen bonding

and π-

π interactions for the simultaneous adsorption of dyes. Notably

the adsorbent demonstrates universal applicability in simultaneously removing both anionic and cationic dyes from mixed dye systems. After 10 adsorption-desorption cycles

the adsorption efficiency remains above 99%

indicating exceptional stability and reusability.

关键词

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references

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