Sorption properties of thin-layer nickel(II) sulfide. V. Chemistry of gold-195 sorption by sulfide in the NaNO/sub 3/-NaCl-Na/sub 2/S-HCl-H/sub 2/O system
The sorption behavior of /sup 195/Au has been studied by ion exchange, ultrafiltration, and calculation of ionic equilibria at an analytical concentration n /times/ 10/sup /minus/9/ M in chloride-nitrate-sulfide solutions with an ionic strength ..mu.. = 3 with respect to thin-layer nickel sulfide under conditions of supersaturation with sulfide sulfur referred to NiS. An adequate model of the sorption process has been proposed and the concentration constants (ml/g) have been calculated for the sorbed complexes: (3.8 +- 2.6) /times/ 10/sup 4/ for Au(SH)Cl/sup /minus//, (1.4 +- 1.0) /times/ 10/sup 4/ for Au(H/sub 2/O)S/sup /minus//, and (1.3 +- 0.9) /times/ 10/sup 3/ for Au(SH)/sub 2//sup /minus//. The free reaction energies ..delta..G/sub 298//sup 0/ have also been calculated: 43.10 kJ/mole for Au(SH)/sub 2//sup /minus// + Cl/sup /minus// = Au(SH)Cl/sup /minus// + SH/sup /minus// and 25.5 kJ/mole for Au(SH)/sub 2//sup /minus// + H/sub 2/O = Au(H/sub 2/O)S/sup /minus// + N/sub 2/S. The mechanism of sorption of microamounts of gold from chloride solutions by nickel sulfide has been refined.
- OSTI ID:
- 6046180
- Journal Information:
- Sov. Radiochem. (Engl. Transl.); (United States), Vol. 29:6; Other Information: Translated from Radiokhimiya; 29: No. 6, 782-787(Nov-Dec 1987)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
GOLD 195
SORPTION
INORGANIC ION EXCHANGERS
SORPTIVE PROPERTIES
NICKEL SULFIDES
AQUEOUS SOLUTIONS
COLLOIDS
COMPLEXOMETRY
ELECTROLYTES
FORMATION FREE ENERGY
GOLD COMPLEXES
HYDROCHLORIC ACID
ION EXCHANGE
ISOTOPE SEPARATION
PHASE DIAGRAMS
RADIOCHEMICAL ANALYSIS
SODIUM CHLORIDES
SODIUM NITRATES
SODIUM SULFIDES
THIN FILMS
ULTRAFILTRATION
ALKALI METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
DAYS LIVING RADIOISOTOPES
DIAGRAMS
DISPERSIONS
ELECTRON CAPTURE RADIOISOTOPES
ENERGY
FILMS
FILTRATION
FREE ENERGY
GOLD ISOTOPES
HALIDES
HALOGEN COMPOUNDS
HEAVY NUCLEI
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ION EXCHANGE MATERIALS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATERIALS
MIXTURES
NICKEL COMPOUNDS
NITRATES
NITROGEN COMPOUNDS
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLUTIONS
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
400202* - Isotope Effects
Isotope Exchange
& Isotope Separation
400101 - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures