基于聚吡咯的分子印迹聚合物去除内分泌干扰物(17 β-雌二醇):动力学、等温线和热力学研究

IF 5.7 3区 环境科学与生态学 Q1 WATER RESOURCES
Samaneh Mohebbi, Aram Dokht Khatibi, Davoud Balarak, Maryam Khashij, Edris Bazrafshan, Mohammad Mehralian
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引用次数: 0

摘要

本文主要研究了分子印迹聚合物(PPy-MIP)的合成和表征,以去除水溶液中的17β-雌二醇(E2)。MIP采用非共价方法合成,纳入目标化合物E2。将300 μl吡咯与50 ml蒸馏水混合,搅拌30 min,加入3g氯化铁作为氧化剂,搅拌2 h,保存48 ~ 72 h,以非分子印迹聚合物(NIP)为对照,比较其MIP性能。考察了pH、接触时间、投加量、温度和浓度等因素对PPy-MIP性能的影响。利用场发射扫描电镜(FESEM)、红外光谱(FTIR)和x射线衍射(XRD)对MIP的结构进行了证实。在最佳条件下,PPy-MIP对E2的去除率为99.97%;NIP的去除率为69.9%。吸附数据符合Langmuir等温线(R2 0.98)和拟二级动力学(R2 0.99)。PPy-MIP对类似化合物如黄体酮和胆固醇的选择性也进行了研究。为了了解吸附过程,进行了热力学、动力学和等温线研究。MIP具有良好的再现性,多次吸收和再吸收循环后去除率仅略有下降。MIP对E2的吸附遵循Langmuir吸附等温线和二级吸附动力学。MIP用于预浓缩和分离真实样品(尿液、血液、医院废水、自来水)中的E2。该方法有望有效和选择性地去除水溶液中的E2。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Endocrine disruptor (17 β-estradiol) removal by poly pyrrole-based molecularly imprinted polymer: kinetic, isotherms and thermodynamic studies

This study focuses on the synthesis and characterization of the molecularly imprinted polymer (PPy-MIP) to remove 17β-Estradiol (E2) from aqueous solutions. The MIP was synthesized using a non-covalent procedure, incorporating the target compound, E2. To synthesis PPy-MIP, a mixture of 300 μl pyrrole and 50 ml distilled water was stirred for 30 min. After adding 3 g ferric chloride as an oxidant, the solution was mixed for 2 h and stored for 48–72 h. MIP capability is compared with a non-molecularly imprinted polymer (NIP) as a control. Various factors such as pH, contact time, dosage, temperature, and concentration were investigated to optimize the performance of the PPy-MIP. The structure of the MIP was confirmed using field emission scanning electron microscopy (FESEM), infrared spectrophotometric spectrum (FTIR), and X-ray diffraction (XRD). The efficiency of the PPy-MIP in removing E2 was obtained 99.97% at optimum condition; while, the NIP achieved a removal efficiency of 69.9%. Adsorption data were fitted with Langmuir isotherms (R2 0.98) and pseudo-second-order kinetics (R2 0.99). The selectivity of the PPy-MIP toward similar compounds such as progesterone and cholesterol was also examined. To understand the adsorption process, thermodynamics, kinetics, and isotherm studies were performed. The MIP showed good reproducibility with only a slight decrease in removal efficiency after multiple absorption and reabsorption cycles. The adsorption of E2 by the MIP followed Langmuir adsorption isotherm and second-order adsorption kinetics. MIP was utilized to pre-concentrate and separate E2 in real samples (urine, blood, hospital wastewater, tap water). This method shows promise for efficient and selective removal of E2 from aqueous solutions.

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来源期刊
Applied Water Science
Applied Water Science WATER RESOURCES-
CiteScore
9.90
自引率
3.60%
发文量
268
审稿时长
13 weeks
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