Synthesis and evaluation of green magnetic mesoporous molecularly imprinted polymers for adsorption removal of parabens from cosmetic samples

Q2 Chemistry Current Chemistry Letters Pub Date : 2023-01-01 DOI:10.5267/j.ccl.2023.1.008

Nursyahera Azreen Ramin, Saliza Asma

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Abstract

Parabens are chemicals that are frequently used as preservatives in numerous cosmetic products. In recent years, the safety concern over these compounds has grown due to their endocrine-disrupting activity. In this research, a novel green magnetic molecularly imprinted polymer (GMMIP) was synthesised using propylparaben as a template and then applied as an adsorbent to selectively recognise and remove parabens from cosmetic samples. The green strategies were introduced by using Persicaria odorata or Kesum leaf extract as a reducing agent to synthesise green magnetic nanoparticles (MNP) as a magnetic core, and deep eutectic solvent (DES) has been designed as an environmentally friendly functional monomer that was used in the preparation of GMMIP. The GMMIP was characterised using Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and Brunauer-Emmett-Teller (BET). The results of FESEM and BET indicated that the GMMIP exhibited an irregular spherical shape and mesoporous characteristics with a pore size of 17.74 nm. The adsorption pH, kinetics, isotherms, and thermodynamics parameters were performed to investigate the interactions that take place between GMMIP and propylparaben. The adsorption processes appeared to best fit the pseudo-second-order kinetic and Freundlich isotherm models at an optimum pH of 12. Findings from a thermodynamics study revealed the adsorption process was exothermic, spontaneous, and more favourable at 298 K. The optimised GMMIP was applied as an adsorbent to remove the parabens from cosmetic samples. When compared to methylparaben and ethylparaben, the GMMIP had the highest selectivity and effectively removed propylparaben, with recoveries ranging from 75.6% to 113.3%. It was found that the limits of detection (LOD) and quantification (LOQ) were between 0.03 and 0.05 mg/L and 0.11 and 0.16 mg/L, respectively. The synthesised GMMIP proved to be a convenient and effective adsorbent to remove parabens from cosmetic products.

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绿色磁性介孔分子印迹聚合物吸附去除化妆品样品中对羟基苯甲酸酯的合成及评价

对羟基苯甲酸酯是一种化学物质，在许多化妆品中经常用作防腐剂。近年来，由于这些化合物具有干扰内分泌的活性，人们对其安全性的担忧日益增加。本研究以对羟基苯甲酸丙酯为模板合成了一种新型绿色磁性分子印迹聚合物(GMMIP)，并将其作为吸附剂选择性地识别和去除化妆品样品中的对羟基苯甲酸酯。采用绿色策略，以臭桃叶提取物为还原剂合成绿色磁性纳米颗粒(MNP)作为磁芯，并设计了深共晶溶剂(DES)作为环保功能单体，用于制备绿色磁性纳米颗粒。利用傅里叶变换红外光谱(FTIR)、场发射扫描电镜(FESEM)和布鲁诺尔-埃米特-泰勒(BET)对GMMIP进行了表征。FESEM和BET结果表明，GMMIP具有不规则球形和介孔特征，孔径为17.74 nm。通过吸附pH、动力学、等温线和热力学参数研究了GMMIP与对羟基苯甲酸丙酯之间的相互作用。在最佳pH值为12时，吸附过程最符合拟二级动力学模型和Freundlich等温模型。热力学研究结果表明，吸附过程是放热的，自发的，并且在298 K时更有利。将优化后的GMMIP作为吸附剂应用于化妆品样品中对羟基苯甲酸酯的去除。与对羟基苯甲酸甲酯和对羟基苯甲酸乙酯相比，GMMIP对对羟基苯甲酸丙酯的选择性最高，回收率为75.6% ~ 113.3%。检测限(LOD)为0.03 ~ 0.05 mg/L，定量限(LOQ)为0.11 ~ 0.16 mg/L。合成的GMMIP是一种方便有效的对羟基苯甲酸酯类化妆品的吸附剂。

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来源期刊

Current Chemistry Letters Chemistry-Chemistry (all)

CiteScore

4.90

自引率

0.00%

发文量

审稿时长

20 weeks

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