Abstract
Ferriferrous oxide/l-cysteine (denoted as Fe3O4/Cys) magnetic microspheres were prepared via a solvothermal route. The content of thiol groups of Fe3O4/Cys microspheres was determined by a DTNB method, and the maximum content of thiol group was as high as 653.62μmol/g. The Fe3O4/Cys microspheres have strong ability to adsorb Pb (II) in aqueous solution and the maximum adsorption capacity reaches 459.33mg/g. The data at adsorption equilibrium are best fitted with a Langmuir model. In addition, the Fe3O4/Cys adsorbent can be easily enriched by a magnetic field, and it indicates that as-synthesized adsorbent can be a promising regenerated adsorbent for Pb (II) ions.
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