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关于新型合成离子液体负载磁约束聚合物介孔吸附剂去除对羟基苯甲酸丙酯、丁酯和苄酯的研究。

A study on the removal of propyl, butyl, and benzyl parabens newly synthesised ionic liquid loaded magnetically confined polymeric mesoporous adsorbent.

作者信息

Md Yusoff Masrudin, Yahaya Noorfatimah, Md Saleh Noorashikin, Raoov Muggundha

机构信息

Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia Bertam 13200 Kepala Batas Penang Malaysia.

Research Centre For Sustainable Process Technology, Chemical Engineering Programme, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia.

出版信息

RSC Adv. 2018 Jul 18;8(45):25617-25635. doi: 10.1039/c8ra03408g. eCollection 2018 Jul 16.

DOI:10.1039/c8ra03408g
PMID:35539765
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9082765/
Abstract

This study investigated the effectiveness of ionic liquids (ILs) loaded onto the surface of a polymeric adsorbent (βCD-TDI) grafted with modified magnetic nanoparticles (MNPs) an analysis of water treatment, which resulted in high removal of selected endocrine-disrupting chemicals (parabens). The syntheses of MNPs, MNP-βCD-TDI, and IL-MNP-βCD-TDI were characterised and compared using Fourier transform infrared (FT-IR) spectroscopy, carbon-hydrogen-nitrogen (CHN) analysis, vibrating sample magnetometry (VSM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), the Brunauer-Emmett-Teller (BET) method, thermogravimetric analysis (TGA), and X-ray diffraction (XRD). The results of SEM and TEM indicated that the pore size distribution exhibited mesoporous characteristics with a small surface area (BET analysis: 42.95 m g). Furthermore, a preliminary sorption experiment demonstrated the ability of IL-MNP-βCD-TDI to enhance not only the sorption capacity, but also the removal of propyl paraben (PP), butyl paraben (BP), and benzyl paraben (ArP). The adsorption process appeared to be pH-dependent, and hence the optimum pH of 6 was selected for a subsequent batch adsorption study of all the studied parabens with an equilibrium time of 80 min. Next, in an attempt to investigate the interactions that occur between the adsorbent and the adsorbates, adsorption kinetics and isotherm studies were performed. All the studied parabens were found to best fit pseudo-second-order kinetics and the Freundlich isotherm with > 0.98 at room temperature (298 K). The interaction of the host-guest inclusion complex and the π-π interaction between βCD and a selected paraben compound (ArP) were identified by performing H nuclear magnetic resonance (NMR), together with ultraviolet-visible (UV-vis) spectroscopic analysis. Finally, the adsorption efficiency of the developed material was practically tested on tap water, drain water, and industrial wastewater, which revealed a significant removal of parabens of up to 60-90% in comparison with a prior analysis.

摘要

本研究考察了负载于接枝有改性磁性纳米颗粒（MNP）的聚合物吸附剂（βCD - TDI）表面的离子液体（IL）对水处理的效果，该处理能高效去除选定的内分泌干扰化学物质（对羟基苯甲酸酯）。使用傅里叶变换红外（FT - IR）光谱、碳氢氮（CHN）分析、振动样品磁强计（VSM）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、布鲁诺尔 - 埃米特 - 泰勒（BET）法、热重分析（TGA）和X射线衍射（XRD）对MNP、MNP - βCD - TDI和IL - MNP - βCD - TDI的合成进行了表征和比较。SEM和TEM结果表明，孔径分布呈现介孔特征，比表面积较小（BET分析：42.95 m²/g）。此外，初步吸附实验表明，IL - MNP - βCD - TDI不仅能提高吸附容量，还能增强对丙基对羟基苯甲酸酯（PP）、丁基对羟基苯甲酸酯（BP）和苄基对羟基苯甲酸酯（ArP）的去除效果。吸附过程似乎依赖于pH值，因此选择最佳pH值为6，对所有研究的对羟基苯甲酸酯进行后续的间歇吸附研究，平衡时间为80分钟。接下来，为了研究吸附剂与吸附质之间发生的相互作用，进行了吸附动力学和等温线研究。发现在室温（298 K）下，所有研究的对羟基苯甲酸酯最符合伪二级动力学和弗伦德利希等温线，相关系数>0.98。通过进行氢核磁共振（NMR）以及紫外可见（UV - vis）光谱分析，确定了主体 - 客体包合物的相互作用以及βCD与选定的对羟基苯甲酸酯化合物（ArP）之间的π - π相互作用。最后，在自来水、排水和工业废水中实际测试了所制备材料的吸附效率，结果显示与之前的分析相比，对羟基苯甲酸酯的去除率高达60 - 90%。

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