Open AccessSynthesis of Novel Ionic Liquid Modified AC-Fe3O4 Magnetic Nanocomposite for the Adsorption of Heavy Metals in Wastewater
Author(s) -
Raymond Taziwa,
Henry H. Mungondori,
Takunda Zarima
Publication year - 2022
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2022.23547
Subject(s) - adsorption , freundlich equation , chemistry , langmuir , metal ions in aqueous solution , nanocomposite , nuclear chemistry , cadmium , inorganic chemistry , ionic liquid , activated carbon , langmuir adsorption model , metal , chemical engineering , organic chemistry , engineering , catalysis
This study reports a novel magnetic nanoadsorbent prepared from magnetite (Fe3O4) as the magneticcore, activated carbon from coal fly ash and an ionic liquid (1-methyl-3-ethylimidazolium chloride).The magnetic nanoadsorbent was synthesized via co-precipitation and characterized by FTIR, XRD,TEM, EDS and BET surface area analysis. Batch adsorption studies on cadmium (Cd2+) and lead(Pb2+) solutions such as effect of pH, contact time and adsorbent dosage were carried out. The datawas analyzed using the Langmuir and Freundlich models. The results revealed that the optimaladsorption conditions for both metal ions on synthesized nanoadsorbent were pH 6, 200 min, adsorbentdosage of 1.5 g/L, initial ion concentration of 10 ppm and a temperature of 25 ºC. The data obtained inthe adsorption of Cd2+ and Pb2+ best fitted the Freundlich isotherm, with R2 values of 0.998 and 0.995,respectively. Thermodynamic and kinetic studies suggested that adsorption of both metal ions on theIL-AC-Fe3O4 nanocomposite followed the pseudo first order model. The synthesised nanoadsorbent(IL-AC-Fe3O4) exhibits good adsorption properties and has great potential in a water treatmenttechnology.