SELECTIVE REMOVAL OF Cd(II) USING DOUBLE IMPRINTED POLYMER FROM SYNTHETIC WATER

Year 2015, Volume: 16 Issue: 1, 15 - 22, 11.05.2015

Ebru Ozkutuk

https://doi.org/10.18038/btd-a.59620

Abstract

The aim of this study is to prepare ion-imprinted polymers which can be used for the selective removal of Cd(II) from synthetic water. Ion-imprinted polymer particles have prepared by molecular imprinting technique using 3-mercaptopropyl-trimethoxysilane as monomer, tetraethoxysilane as crosslinking agent in the presence of Cd(II) and dodecylamine. After that, the template ions have removed using 0.1M HNO₃/ethanol. A batch procedure has used for the determination of the characteristics of the Cd(II) solid phase. The results obtained have shown that the IIP has the greatest adsorption capacity (98.2 mgg^-1). Optimum pH and adsorption time have found as pH 5.0 and 2h. In selectivity study, it has found that imprinting results in increased affinity of the material toward Cd(II) ion over other competitor metal ions with the same charge. The selectivity of Cd(II)/Zn(II), Cd(II)/Cu(II) and Cd(II)/Hg(II) have found as 2.73, 8.83 and 112.8, respectively

Keywords

Ion-imprinted, Cadmium Separation, Preconcentration, Sol-gel

SENTETİK SUDAN ÇİFT BASKILI POLİMER KULLANILARAK Cd(II)'NİN SEÇİCİ UZAKLAŞTIRILMASI

Abstract

Bu çalışmanın amacı, sentetik sudan Cd(II)’nin seçici uzaklaştırılması için kullanılabilecek iyon baskılı polimer hazırlamaktır. İyon baskılı polimer partikülleri, dodesilamin ve Cd(II) varlığında, çapraz bağlayıcı olarak teraetoksisilan, monomer olarak 3-merkaptopropil-trimetoksilanın kullanıldığı moleküler baskılama tekniği ile hazırlanmıştır. Daha sonra baskı iyonları 0,1 M HNO3/etanol kullanılarak uzaklaştırılmıştır. Beç işlemi, Cd(II) katı faz özelliklerinin belirlenmesi için kullanılmıştır. Elde edilen sonuçlar, iyon baskılı polimerin büyük adsorpsiyon kapasitesine (98.2 mgg-1) sahip olduğunu göstermiştir. Optimum pH ve adsorpsiyon süresi sırasıyla 5.0 ve 2 saat olarak bulunmuştur. Seçicilik çalışmalarında, baskılama aynı yüklü diğer yarışmacı metal iyonları üzerinden Cd(II) iyonlarına doğru materyalin afinitesinin arttığı bulunmuştur. Cd(II)/Zn(II), Cd(II)/Cu(II) and Cd(II)/Hg(II)’ın seçicilikleri sırasıyla 2,73; 8,83 ve 112 olarak bulunmuştur

Keywords

İyon baskılama, Kadmiyum ayırma, Önderiştirme, Sol jel

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