Bisphenol A Removal From Aqueous Phase via Polymeric Microbeads/ Polimerik Mikroküreler ile Bisfenol A Uzaklaştırılması

Abstract

The main objective of this study is to investigate the effectiveness of poly(divinylbenzene-N-methacryloyl-L-tryptophan methyl ester) [poly(DVB-MATrp)] microbeads (average diameter = 150-200 μm) to remove bisphenol A (BPA) from aqueous phase. The poly(DVB-MATrp) microbeads were synthesized by copolymerizing N-methacryloyl-L-tryptophan methyl ester (MATrp) in the presence of divinylbenzene (DVB). The poly(DVB-MATrp) beads were characterized by Fourier transform infrared spectroscopy (FTIR), elemental analysis, scanning electron microscopy (SEM) and swelling test. The efficiency of poly(DVB-MATrp) microbeads for adsorption of BPA from aqueous medium was evaluated by investigating the effects of pH, initial concentration, contact time and temperature. The adsorption capacity of the microbeads was determined to be 171.1 mg/g at pH 7.0, 25 ^oC. The Langmuir and Freundlich isotherm models were used to fit adsorption data. The adsorption process obeyed pseudo-second-order kinetic model. The prepared microbeads can be repeatedly used to adsorption of BPA without a significant change in the adsorption capacity.

Bu çalışmanın amacı, poli(divinilbenzen-N-metakriloil-L-triptofan metil ester) [poli(DVB-MATrp)] mikrokürelerin (ortalama çap: 150-200 μm) sulu fazdan bisfenol A (BPA) uzaklaştırılmasındaki etkinliğinin araştırılmasıdır. Poli(DVB-MATrp) mikroküreler N-metakriloil-L-triptofan metil ester (MATrp) monomerinin divinilbenzen (DVB) varlığında polimerleştirilmesi ile sentezlendi. Poli(DVB-MATrp) mikroküreler Fourier dönüşüm infrared spektroskopisi (FTIR), elementel analiz, taramalı elektron mikroskobu (SEM), ve şisme testi ile karakterize edildi. Poli(DVB-MATrp) mikrokürelerin sulu fazdan BPA adsorplamadaki etkinliği pH, başlangıç derişimi, temas süresi ve sıcaklığın etkisinin araştırılması ile incelendi. Mikrokürelerin BPA adsorpsiyon kapasitesi pH 7.0 ve 25 ^oC sıcaklıkta 171,1 mg/g olarak belirlendi. Elde edilen adsorpsiyon verilerinin Langmuir ve Freundlich izoterm modellerine uygunluğu araştırıldı. Adsorpsiyonun yalanı-ikinci-derece kinetik modele uygun olduğu belirlendi. Sentezlenen mikroküreler, BPA adsorpsiyon kapasitesinde önemli bir değişiklik olmaksızın tekrar tekrar kullanıldı

Keywords

• Bisphenol A; removal; polymeric microbeads; endocrine disruptor

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