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Isopentyl-Sulfide-Impregnated Nano-MnO2 for the Selective Sorption of Pd(II) from the Leaching Liquor of Ores
- Source :
- Molecules, Vol 22, Iss 7, p 1117 (2017), Molecules; Volume 22; Issue 7; Pages: 1117, Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry
- Publication Year :
- 2017
- Publisher :
- MDPI AG, 2017.
-
Abstract
- Conventional separation methods are not suitable for recovering palladium present in low concentrations in ore leaching solutions. In this study, a novel isopentyl sulfide (S201)-impregnated α-MnO2 nanorod adsorbent (BISIN) was prepared, characterized, and applied for the selective adsorption and separation of palladium from the leaching liquor of ores. Batch studies were carried out, and the main adsorption parameters were systematically investigated, in addition to the relevant thermodynamic parameters, isotherms, and kinetic models. The thermodynamic parameters reflected the endothermic and spontaneous nature of the adsorption. Moreover, the experimental results indicated that the Langmuir isotherm model fits the palladium adsorption data well and the adsorption was well described by the pseudo-second-order kinetic model. The main adsorption mechanisms of palladium were elucidated at the molecular level by X-ray crystal structure analysis. Thiourea was found to be an excellent desorption agent, and the palladium-thiourea complex was also confirmed by X-ray crystal structure analysis. The results indicated that almost all of the Pd(II) (>99.0%) is adsorbed on BISIN, whereas less than 2% of the adsorbed Pt(IV), Fe3+, Cu2+, Ni2+, and Co2+ is observed under the optimum conditions. The proposed method can be used for the efficient adsorption and separation of palladium from the leaching liquor of ores.
- Subjects :
- separation
Time Factors
Pharmaceutical Science
02 engineering and technology
Crystallography, X-Ray
01 natural sciences
Analytical Chemistry
X-Ray Diffraction
Desorption
Drug Discovery
Spectroscopy, Fourier Transform Infrared
chemistry.chemical_classification
Chemistry
manganese dioxide
Temperature
Langmuir adsorption model
Sorption
Oxides
Hydrogen-Ion Concentration
021001 nanoscience & nanotechnology
Chemistry (miscellaneous)
Selective adsorption
symbols
Molecular Medicine
0210 nano-technology
Porosity
Palladium
Sulfide
Nitrogen
Inorganic chemistry
chemistry.chemical_element
Sulfides
010402 general chemistry
Article
Mining
isopentyl sulfide
palladium
adsorption
lcsh:QD241-441
symbols.namesake
Adsorption
lcsh:Organic chemistry
Physical and Theoretical Chemistry
Organic Chemistry
0104 chemical sciences
Kinetics
Manganese Compounds
Nanoparticles
Leaching (metallurgy)
Water Pollutants, Chemical
Subjects
Details
- Language :
- English
- ISSN :
- 14203049
- Volume :
- 22
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Molecules
- Accession number :
- edsair.doi.dedup.....f285e3e0e14ca5713340476f6160eb9e