Preparation and application of monodisperse, highly cross-linked, and porous polystyrene microspheres for dye removal
Preparation and application of monodisperse, highly cross-linked, and porous polystyrene microspheres for dye removal
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单分散、高交联、多孔聚苯乙烯脱色微球的制备及应用
DOI：
10.1016/j.colsurfa.2022.129596
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发表时间：
2022-06
期刊：
影响因子：
--
通讯作者：
Mingyao Zhang
中科院分区：
文献类型：
--
作者：
Haichao Xu;Baijun Liu;Mingyao Zhang
多孔材料作为吸附剂在染料去除中起着重要的作用。本文采用种子溶胀乳液聚合法合成了单分散、高交联的多孔微球，其比表面积为255.83 m2/g，平均孔径为8.5 nm。对多孔微球进行磺化反应，以提高微球表面的亲水性和电负性。以阳离子亚甲基蓝（MB）和阴离子甲基橙子（MO）为模拟染料废水，研究了多孔微球对MB和MO的吸附动力学。实验结果表明，由于微球表面的负电荷与MB分子的正电荷之间的静电相互作用，多孔磺酸盐微球对MB具有选择性吸附。吸附2 h后，多孔微球的吸附容量为313.125mg/g。MB染料在多孔微球中的吸附动力学符合准二级动力学模型。
The porous materials as adsorbents play an important role in dye removal. In this paper, monodisperse, highly cross-linked porous microspheres with a specific surface area of 255.83 m²/g and average pore size of 8.5 nm were synthesized by seed swollen emulsion polymerization. The sulfonation reactions of porous microspheres were carried out to improve the hydrophilic performance and electronegativity of the microsphere surface. Cationic methylene blue (MB) and anionic methyl orange (MO) were employed as simulated dye wastewater to investigate the adsorption kinetics of porous microspheres. The experimental results demonstrate that porous sulfonate microspheres possess selective adsorption for MB due to electrostatic interaction between the negative charges on the surface of microspheres and the positive charges of MB molecules. Porous microspheres exhibit an adsorption capacity of 313.125 mg/g after 2 h. The adsorption kinetics of MB dyes in porous microspheres follow a pseudo-second-order model.
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