植酸交联β-环糊精对阳离子染料的快速高效吸附。
Fast and highly efficient adsorption of cationic dyes by phytic acid crosslinked β-cyclodextrin.
机构信息
Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, PR China.
Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, PR China.
出版信息
Carbohydr Polym. 2022 May 15;284:119231. doi: 10.1016/j.carbpol.2022.119231. Epub 2022 Feb 8.
In this study, a novel adsorbent (PA-β-CD) capable of fast and efficient adsorption of cationic dyes was successfully prepared by the poly-condensation reaction of phytic acid (PA) and β-cyclodextrin (β-CD). Results showed that PA-β-CD exhibited high adsorption capacities of 1095, 2005.58, 1736.32, and 1930.23 mg/g for methylene blue (MB), basic green 4 (MG), astrazon pink FG (FG), and crystal violet (MV), respectively. In addition, the adsorption of cationic dyes on PA-β-CD was very fast, and most of cationic dyes were adsorbed in the first 2 min. Moreover, PA-β-CD could selectively adsorb the cationic dye from a cationic/anionic dye mixture. Adsorption data revealed that the adsorption kinetics fitted the pseudo-second-order model well, and the isotherms were well described by a Langmuir isotherm model. The regeneration efficiency of the adsorbent remained above 90% after the fifth cycle. The present work confirmed that PA-β-CD shows great potential in the treatment of dye wastewater.
在这项研究中，通过植酸（PA）和β-环糊精（β-CD）的缩聚反应成功制备了一种新型吸附剂（PA-β-CD），该吸附剂能够快速有效地吸附阳离子染料。结果表明，PA-β-CD 对亚甲蓝（MB）、碱性绿 4（MG）、偶氮粉红 FG（FG）和结晶紫（MV）的吸附容量分别高达 1095、2005.58、1736.32 和 1930.23 mg/g。此外，阳离子染料在 PA-β-CD 上的吸附非常迅速，大多数阳离子染料在前 2 分钟内被吸附。此外，PA-β-CD 可以从阳离子/阴离子染料混合物中选择性地吸附阳离子染料。吸附数据表明，吸附动力学很好地符合伪二级模型，等温线很好地符合朗缪尔等温线模型。吸附剂在经过五次循环后再生效率仍保持在 90%以上。本研究证实，PA-β-CD 在处理染料废水方面具有很大的潜力。
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