ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Recovery of Au(III) ions by Au(III)-imprinted hydrogel

Melike Fırlak, Soner Çubuk, Ece Kök Yetimoğlu, and Memet V. Kahraman

^aSchool of Pharmacy, Istanbul Kemerburgaz University, Istanbul 34217, Turkey

E-mail: melike.firlak@kemerburgaz.edu.tr

Abstract: A new Au(III)-imprinted hydrogel (Au(III)-Imp) was prepared by the photopolymerisation of 4- acryloylmorpholine (AcM), 2-hydroxyethyl acrylate (HEA), and poly(ethylene glycol) diacrylate (cross-linking monomer, PEG-DA) in the presence of gold ions. In addition, non-imprinted hydrogel (N-Imp) was similarly prepared without Au(III) ions The Au(III)-Imp hydrogel was characterised by several techniques. To achieve the optimal conditions, effect of pH, time, and initial metal ion concentrations were investigated using a batch system. The pre-concentration factor for Au(III) ions was found to be at least 100. The analytical parameters of the method were determined and the method was also successfully applied to computer circuit board scrap samples. The reusability of the Au(III)-Imp hydrogel was also determined.

Keywords: ion imprinted hydrogel – 4-acryloylmorpholine – gold(III) removal – UV curing

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2016-0019

Chemical Papers 70 (6) 757–768 (2016)