4.4 Article

Application of ion-exchange resin beads to produce magnetic adsorbents

期刊

CHEMICAL PAPERS
卷 75, 期 3, 页码 1187-1195

出版社

SPRINGER INT PUBL AG
DOI: 10.1007/s11696-020-01376-y

关键词

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

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  1. University of Miskolc

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Heavy metal ions, a major pollutant, can cause serious health problems. Ion-exchange resin beads were used as supports for magnetite synthesis to produce heavy metal adsorbents that can be separated by magnetic field. The preparation involved ion replacement and particle formation, resulting in relatively large magnetite crystal particles. Adsorption experiments confirmed the ion-exchange effect of the magnetic adsorbent.
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 Fe(2+)and Fe(3+)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+, Pb(2+)and Cd(2+)ions in adsorption experiments.

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