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

Application of ion-exchange resin beads to produce magnetic adsorbents

Emőke Sikora, Viktória Hajdu, Gábor Muránszky, Kitti Krisztina Katona, István Kocserha, Toshiyuki Kanazawa, Béla Fiser, Béla Viskolcz, and László Vanyorek

Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Hungary

E-mail: emoke.sikora@gmail.com

Received: 17 February 2020  Accepted: 23 September 2020

Abstract:

Heavy metal ions are among the most dangerous contaminants, which can cause serious health problems. In this work, ion-exchange resin beads were used as supports for magnetite (Fe₃O₄) synthesis to produce heavy metal adsorbents which can be easily separated by magnetic field. The first step of the magnetite preparation was the replacement of hydrogen ions with Fe²⁺ and Fe³⁺ ions on the sulfonic acid groups of the resin. In the second step, magnetite particle formation was induced by coprecipitating the iron ions with sodium hydroxide. The regeneration of the ion-exchange resin was also carried out by using sodium hydroxide. SEM images verified that relatively large magnetite crystal particles (diameter = 100–150 nm) were created. The ion-exchange effect of the prepared magnetic adsorbent was also confirmed by applying Cu²⁺, Ni²⁺, Pb²⁺ and Cd²⁺ ions in adsorption experiments.

Keywords: Heavy metal ion removal; Magnetite; Adsorption capacity; Langmuir constant

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01376-y

Chemical Papers 75 (3) 1187–1195 (2021)