Abstract
Aiming at selective adsorption and separation of Pd(II) in nitric acid solution, a hybrid soft N and hard O donor adsorbent (TAMIA-EH+TOA)/SiO2–P (P = Polymer) was successfully synthesized. The adsorption performances of (TAMIA-EH+TOA)/SiO2–P adsorbent towards Pd(II) were systematically investigated as a function of contact time, effect of concentration of nitric acid, effect of temperature etc. Adsorption speed of Pd(II) was fairly fast and can reach equilibrium state within only 0.5 h. The distribution coefficient of Pd(II) was more than 103 when [HNO3] = 0.1. Though it decreased gradually with an increase in the concentration of HNO3, the adsorption selectivity of (TAMIA-EH+TOA)/SiO2–P adsorbent towards Pd(II) was still significant than other co-existing metal ions in the whole HNO3 range from 0.1 to 5 M. The adsorption isotherm of Pd(II) onto (TAMIA-EH+TOA)/SiO2–P adsorbent fitted well with Langmuir adsorption model but Freundlich isotherm model. The calculated results of adsorption thermodynamic parameters indicated that the adsorption process of Pd(II) was exothermic and happened in a natural way. Furthermore, the separation chromatography experiment by utilizing (TAMIA-EH+TOA)/SiO2–P adsorbent packed column was carried out. Based on the results of plotted elution curves, it was found that the successful recovery of Pd(II) (96.27%) was achieved by eluting with thiourea solution.
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Original Papers
- Plutonium complexes in water: new approach to ab initio modeling
- Synthesis of selective biodegradable amidoxime chitosan for absorption of Th(IV) and U(VI) ions in solution
- A new method for monitoring the redox potential of fuel salt based on the deposition of 95Nb on Hastelloy C276
- Adsorption and separation behavior of palladium(II) from simulated high-level liquid waste using a novel silica-based adsorbents
- Investigation on the efficient separation and recovery of Se(IV) and Se(VI) from wastewater using Fe–OOH–bent
- Separation of no-carrier-added 71,72As from 46 MeV alpha particle irradiated gallium oxide target
- Efficient trace-scale extraction method of reactor produced 199Au adequate for nuclear medicine applications
- The influence of gamma radiation on organic compounds having carbon ring and its application in dosimetry
Artikel in diesem Heft
- Frontmatter
- Original Papers
- Plutonium complexes in water: new approach to ab initio modeling
- Synthesis of selective biodegradable amidoxime chitosan for absorption of Th(IV) and U(VI) ions in solution
- A new method for monitoring the redox potential of fuel salt based on the deposition of 95Nb on Hastelloy C276
- Adsorption and separation behavior of palladium(II) from simulated high-level liquid waste using a novel silica-based adsorbents
- Investigation on the efficient separation and recovery of Se(IV) and Se(VI) from wastewater using Fe–OOH–bent
- Separation of no-carrier-added 71,72As from 46 MeV alpha particle irradiated gallium oxide target
- Efficient trace-scale extraction method of reactor produced 199Au adequate for nuclear medicine applications
- The influence of gamma radiation on organic compounds having carbon ring and its application in dosimetry