NDLI: Sorption of aqueous palladium onto synthetic hydroxyapatite

Content Provider	Springer Nature Link
Author	Soria Rodríguez, J. M. Badillo Almaraz, V. E. Alliot, C. Monroy Guzmán, F. Vitorge, P.
Copyright Year	2011
Abstract	The sorption of Pd(II) on hydroxyapatite (Ca$_{10}$(PO$_{4}$)$_{6}$(OH)$_{2}$) has been studied at 25 °C as a function of pH, in 0.01 M NaClO$_{4}$, and 0.01 and 0.025 M Ca(ClO$_{4}$)$_{2}$ aqueous background electrolytes and Pd(II) concentration (9.3 to 47 μM), trying to minimize some types of reactions, such as solid dissolution of and metal precipitation. The radiotracer palladium, $^{109}$Pd, obtained by neutron irradiation, has been used to calculate the palladium’s distribution coefficients K $_{d}$ between aqueous and solid phase. A mathematical treatment of results has been made by ion-exchange theory in order to interpret palladium sorption onto treated solid. For this, we take into account the existence of active sites at the hydroxyapatite surface, and the aqueous solution chemistry of palladium as well as the effect of phosphate anions from solid dissolution. The results can be explained as evidence of sorption of the species PdOH$^{+}$, and of a mixed hydroxo complex of Pd$^{2+}$ like (XCaO$^{−}$)–PdOH$^{+}$·nH$_{2}$O fixed onto {≡Ca–OH} surface sites of the hydroxyapatite.
Starting Page	645
Ending Page	652
Page Count	8
File Format	PDF
ISSN	02365731
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume Number	288
Issue Number	3
e-ISSN	15882780
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-03-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Palladium Sorption Hydroxyapatite Surface sites Ion-exchange theory Inorganic Chemistry Nuclear Physics, Heavy Ions, Hadrons Physical Chemistry Nuclear Chemistry Diagnostic Radiology
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Pollution Health, Toxicology and Mutagenesis Radiology, Nuclear Medicine and Imaging Analytical Chemistry Public Health, Environmental and Occupational Health Nuclear Energy and Engineering

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