Mira Nur Fadilah, Irma Kartika Kusumaningrum, Anugrah Ricky Wijaya
This research was conducted to synthesise Magnetic Solid Phase Extraction (MSPE) adsorbent to adsorb Pb(II) ions. The MSPE adsorbent consists of a magnetic part as a core and a coating as an analyte-binder. This research aimed to synthesise carboxymethyl kappa-carrageenan (CMKC) coated nano-magnetite, which was crosslinked with bisphenol A diglycidyl ether (BADGE), as Pb(II) ion adsorbent. This research was conducted in several stages, which were a synthesis of nano-magnetite and its physicochemical characterisation using SEM, FTIR, and XRD instruments; CMKC synthesis and characterisation by FTIR; synthesis of Pb(II) ion-imprinted BADGE-coated CMKC-coated nano-magnetites and its characterisation using FTIR, SEM, and XRF instruments, and tested its adsorption ability to Pb(II) ions. The synthesised magnetite has a size of 28?nm; the formation of magnetite was confirmed by the absorption peak in the FTIR spectrum resulting from the synthesis of magnetite, typical Fe-O peaks at 581.35?cm-1 and 443.5?cm-1. The synthesised magnetite diffractogram was identical to the Fe3O4 diffractogram. CMKC was successfully synthesised, confirmed by the appearance of the absorption peak of the C=O group at wave numbers 1604?cm-1 and 1443?cm-1, which showed asymmetric and symmetrical vibrations of the -COO-group in the FTIR spectrum, indicating a carboxyl group. The adsorbent in the form of CMKC-coated nano-magnetite cross-linked with BADGE, printed with Pb(II) ions, was successfully synthesised; the surface of the adsorbent is rough, porous and pleated, FTIR spectrum of the adsorbent, showed that crosslinking and mould formation caused the C=O asymmetric vibration peak to shift to 1650?cm-1. The adsorbent has the adsorption ability (Kads) to Pb(II) ions of 0.156?mg Pb(II)/g adsorbent. © 2024 Author(s).
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, 65145, Indonesia
