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Highly Effective Removal of Metal Cyanide Complexes and Recovery of Palladium Using Quaternary-Ammonium-Functionalized MOFs
- Source :
- Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry, Molecules, Volume 23, Issue 8, Molecules, Vol 23, Iss 8, p 2086 (2018)
- Publication Year :
- 2018
- Publisher :
- MDPI, 2018.
-
Abstract
- In this study, quaternary-ammonium-functionalized metal&ndash<br />organic frameworks (MOFs) Et-N-Cu(BDC-NH2)(DMF), were prepared, characterized, and applied for the highly effective removal of metal cyanide complexes, including Pd(CN)42&minus<br />Co(CN)63&minus<br />and Fe(CN)63&minus<br />Batch studies were carried out, and the maximum adsorption capacities of Pd(II), Co(III), and Fe(III) reached 172.9, 101.0, and 102.6, respectively. Adsorption was rapid, and equilibrium was established within 30 min. Et-N-Cu(BDC-NH2)(DMF) exhibited high thermal and chemical stability. Furthermore, absorbed Pd(CN)42&minus<br />was selectively recovered by two-step elution. First, Co(CN)63&minus<br />were eluted with a 1.5 mol L&minus<br />1 KCl solution. Elution rates of Co(CN)63&minus<br />were greater than 98.0%, whereas the elution percentage of Pd(CN)42&minus<br />was less than 2.0%. Second, &gt<br />97.0% Pd(CN)42&minus<br />on the loaded MOFs was eluted using a 2.0 mol L&minus<br />1 KI solution. The recovery rate of Pd(CN)42&minus<br />was greater than 91.0% after five testing cycles. Adsorption isotherms, kinetics models, and adsorption thermodynamics of Pd(CN)42&minus<br />on Et-N-Cu(BDC-NH2) (DMF) were also systematically investigated. The Et-N-Cu(BDC-NH2) (DMF) absorbent exhibited a rapid, excellent ability for the adsorption of metal cyanide complexes.
- Subjects :
- palladium cyanide recovery
Cyanide
Iron
Kinetics
Pharmaceutical Science
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
Ligands
01 natural sciences
Article
Analytical Chemistry
Metal
lcsh:QD241-441
chemistry.chemical_compound
Adsorption
lcsh:Organic chemistry
Coordination Complexes
Drug Discovery
Physical and Theoretical Chemistry
Metal-Organic Frameworks
metal cyanide complexes
Cyanides
Elution
removal
Organic Chemistry
Cobalt
metal-organic framework
Hydrogen-Ion Concentration
021001 nanoscience & nanotechnology
0104 chemical sciences
Quaternary Ammonium Compounds
chemistry
Chemistry (miscellaneous)
visual_art
visual_art.visual_art_medium
Molecular Medicine
Thermodynamics
Metal-organic framework
Chemical stability
0210 nano-technology
Palladium
Water Pollutants, Chemical
Nuclear chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 14203049
- Volume :
- 23
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry
- Accession number :
- edsair.doi.dedup.....180edbd00eb9ffb0e6b447b969f32506