Preparation and characterization of immobilized [A336][MTBA] in PVA-alginate gel beads as novel solid-phase extractants for an efficient recovery of Hg (II) from aqueous solutions
- Author(s)
- Yun Zhang, Daniel Kogelnig, Cornelia Morgenbesser, Anja Stojanovic, Franz Jirsa, Irene Lichtscheidl-Schultz, Regina Krachler, Yanfeng Li, Bernhard Keppler
- Abstract
The coarse PVA-alginate matrix gel beads entrapping the micro-droplets of the ionic liquid tricaprylylmethylammonium 2-(methylthio) benzoate ([A336][MTBA]) as novel solid-phase extractants were prepared for the removal of mercury (II) from aqueous media. The ionic liquid [A336][MTBA] immobilized PVA-alginate beads (PVA/IL) have been characterized by FTIR, SEM and TGA. The influence of the uptake conditions was investigated including aqueous pH. PVA/IL dosage, the content of [A336][MTBA] and initial Hg (II) concentration: maximum Hg (II) ion adsorption capacity obtained was 49.89 (+/- 0.11) mg g(-1) at pH 5.8 with adsorptive removal of approximately 99.98%. The selectivity of the PVA/IL beads towards Hg (II), Pb (II) and Cu (II) ions tested was Hg > Pb > Cu. The rate kinetic study was found to follow second-order and the applicability of Langmuir, Freundlich and Tempkin adsorption isotherm model were tested as well. The results of the study showed that PVA/IL beads could be efficiently used as novel extractants for the removal of divalent mercury from aqueous solutions under comparatively easy operation conditions.
- Organisation(s)
- Department of Inorganic Chemistry
- External organisation(s)
- Lanzhou University
- Journal
- Journal of Hazardous Materials
- Volume
- 196
- Pages
- 201-209
- No. of pages
- 9
- ISSN
- 0304-3894
- DOI
- https://doi.org/10.1016/j.jhazmat.2011.09.018
- Publication date
- 2011
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104003 Inorganic chemistry
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/preparation-and-characterization-of-immobilized-a336mtba-in-pvaalginate-gel-beads-as-novel-solidphase-extractants-for-an-efficient-recovery-of-hg-ii-from-aqueous-solutions(76f78bca-3ec2-474b-9b21-6235ebdfce7e).html