Efficient adsorption of bisphenol A from water by a hierarchically porous hyper-crosslinked polymer containing β-cyclodextrin polyurethane

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2023-08-15 DOI:10.1016/j.seppur.2023.124076

Liqin Zhou, Qiuyuan Huang, Hongbing Ji, Xuan Tang, Yuxuan Zhang, Kungang Chai

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引用次数: 8

Abstract

Bisphenol A (BPA) is a common industrial products ingredient, whose widespread utilization leads to a non-negligible problem of water pollution. For efficient adsorption of BPA, hyper-crosslinked β-cyclodextrin polyurethane (CDPU-HCP) was synthesized via crosslinking β-cyclodextrin (β-CD) with 4,4′-diphenylmethane diisocyanate followed by further external crosslinking reaction. CDPU-HCP showed high surface area (1133.12 m²∙g⁻¹) and has hierarchically pores, such as β-CD nanocavities, micropore and mesopores. Adsorption data fitted better with Freundlich adsorption isotherm model and the pseudo second order kinetic model. The fitted maximum adsorption capacity toward BPA was shown to be 371.8 mg∙g⁻¹. The stable adsorption performance during successive six recycling experiments indicated the excellent recyclability of CDPU-HCP. Furthermore, the density functional theory (DFT) calculations showed hydrophobic interaction of β-CD cavity and π-π interactions between aromatic moieties and BPA synergistically promoted the adsorption process. Therefore, CDPU-HCP was suggested to be a promising adsorbent in the treatment of BPA.

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含β-环糊精聚氨酯的分级多孔超交联聚合物对水中双酚A的高效吸附

双酚A (BPA)是一种常见的工业产品成分，其广泛使用导致了不可忽视的水污染问题。为了高效吸附BPA，将β-环糊精(β-CD)与4,4′-二苯基甲烷二异氰酸酯交联，再进行外交联反应，合成了超交联β-环糊精聚氨酯(CDPU-HCP)。CDPU-HCP具有较高的比表面积(1133.12 m2∙g−1)，并具有β-CD纳米孔、微孔和介孔等分层孔隙。吸附数据较好地符合Freundlich吸附等温线模型和拟二级动力学模型。对BPA的最大吸附量为371.8 mg∙g−1。连续6次回收实验均显示其稳定的吸附性能，表明其具有良好的可回收性。此外，密度泛函理论(DFT)计算表明，β-CD空腔的疏水相互作用和芳香基团与BPA之间的π-π相互作用协同促进了吸附过程。因此，CDPU-HCP是一种很有前途的处理双酚a的吸附剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.