Selective Separation of Cobalt Using a New Co(II)-Imprinted Polymer/Cryogel System

Gurbet Canpolat

doi:10.17776/csj.455103

TR EN

Yeni Bir Co(II)-Baskılı Polimer/Kriyojel Sistem Kullanılarak Kobalt(II)'ın Seçici Olarak Ayrılması

Öz

Bu çalışmanın amacı, iyon baskılama tekniği ile sulu çözeltilerden Co(II) iyonunun seçici olarak ayrılmasını ve ön derişimini araştırmaktı. Bu amaçla, Co(II)-metakriloilhistidin ((MAH)₂-Co(II)) kompleks monomer sentezlendi ve 2-hidroksietil metakrilat (HEMA) varlığında polimerleştirildi. Ardından, 5.0 mol*L^-1 HNO₃ ile bağlı Co(II) iyonları polimerden söküldü. Böylece, hedef iyonun (Co(II)), p-HEMA-MAH kriyojel kolonuna tekrardan bağlanması için spesifik boşluklar oluşturuldu. Hazırlanan metal kompleks ve baskılı-kriyojel FTIR ve SEM ile karakterize edilmiştir. Optimum adsorpsiyon koşullarını belirlemek için, pH, başlangıç konsantrasyonu, akış hızı, iyonik şiddet gibi çeşitli parametrelerin etkisi araştırılmıştır. Maksimum adsorbe edilen Co(II) miktarı, pH 8.0'de 1 mL*dk^-1 akış hızında 106.0 mg*g^-1 olarak tespit edilmiştir. Seçicilik deneyleri için, bağlanma çalışmaları Cu(II) ve Ni(II) varlığında gerçekleştirilmiş olup k (seçicilik katsayısı) değerleri sırasıyla Co(II)/Cu(II) ve Co(II)/Ni(II) ikili karışımı için 8.9 ve 3.8 olarak bulunmuştur. Kolonun tekrar kullanımı araştırılmış ve ardışık on bir deneyde bile adsorpsiyon kapasitesinde önemli bir azalma olmadığı tespit edilmiştir.

Anahtar Kelimeler

İyon Baskılı Polimer,kriyojel,kobalt,seçici tanıma

Selective Separation of Cobalt Using a New Co(II)-Imprinted Polymer/Cryogel System

Abstract

The aim of the present study was to investigate selective separation and preconcentration of Co(II) ions in aqueous solutions by ion imprinted technique. For this purpose, Co(II)-methacryloylhistidine((MAH)₂-Co(II)) complex monomer has been synthesized and polymerized with presence of 2-hydroxyethyl methacrylate (HEMA) followed by flushed out of bonded Co(II) ions from polymer with 5.0 mol*L^-1HNO₃. Thus, specific cavities for re-binding of target ions (Co(II)) have been created onto p-HEMA-MAH cryogel column. Prepared metal complex and Co-imprinted polymer/cryogel system have been characterized by FTIR and SEM. The effect of various parameters such as pH, initial concentration, flow rate, ionic strength have been investigated to determine optimal adsorption conditions. The maximum amount of adsorbed Co(II) has found as 106.0 mg*g^-1at pH 8.0 with flow rate of 1 mL*min^-1. For selectivity experiments, binding studies were carried out presence of Cu(II) and Ni(II). The k (selectivity coefficient) values have found as 8.9 and 3.8 for Co(II)/Cu(II) and Co(II)/Ni(II) binary mixture, respectively. The reuse of column also has been investigated and there was no significant decrease at adsorption capacity even in consecutive eleven experiments.

Keywords

cryogel,cobalt,Ion Imprinted polymer,selective recognition

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Details

Primary Language

English

Subjects

-

Journal Section

Research Article

Authors

Gurbet Canpolat ^*
Türkiye

Publication Date

December 24, 2018

Submission Date

August 25, 2018

Acceptance Date

November 12, 2018

Published in Issue

Year 2018 Volume: 39 Number: 4

DOI

https://doi.org/10.17776/csj.455103

IZ

https://izlik.org/JA52DU84DA

Cite

RIS / Bibtex

APA

Canpolat, G. (2018). Selective Separation of Cobalt Using a New Co(II)-Imprinted Polymer/Cryogel System. Cumhuriyet Science Journal, 39(4), 920-927. https://doi.org/10.17776/csj.455103

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