The solution chemistry of the copper (II) - ammonia - thiosulfate aqueous system

Povar Igor; Ubaldini Stefano; Lupascu Tudor; Spinu Oxana; Pintilie Boris

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2024-01-18 18:09

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POVAR, Igor, UBALDINI, Stefano, LUPASCU, Tudor, SPINU, Oxana, PINTILIE, Boris. The solution chemistry of the copper (II) - ammonia - thiosulfate aqueous system. In: The Environment and the Industry: SIMI 2018 Proceedings Book, 20-21 septembrie 2018, București. București, România: National Research and Development Institute for Industrial Ecology ECOIND, 2018, Ediția a 21-a, Proceedings Book, pp. 162-169. ISSN 1843-5831. DOI: https://doi.org/10.21698/simi.2018.fp20

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The Environment and the Industry
Ediția a 21-a, Proceedings Book, 2018

Conferința "The Environment and the Industry"
București, Romania, 20-21 septembrie 2018

The solution chemistry of the copper (II) - ammonia - thiosulfate aqueous system

DOI:https://doi.org/10.21698/simi.2018.fp20

Pag. 162-169

Povar Igor¹, Ubaldini Stefano², Lupascu Tudor¹, Spinu Oxana¹, Pintilie Boris¹

¹ Institute of Chemistry,
² Institute of Environmental Geology and Geoengineering (IGAG), CNR

Disponibil în IBN: 17 iunie 2020

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The paper presents a new thermodynamic approach to studying mixed ligand complex formation reactions in multicomponent two-phase systems “solid phase saturated aqueous solution” under real conditions. The quintessence of developed approach consists in the thermodynamic analysis of concurrent reactions in the system Cu (II)-NH3-S2O32--H2O under real conditions on the basis of the introduced notion of the generalized reaction equation. The formation of mixed ligand complex species Cu(OH)i (NH3 ) j (S2O3 )k is characterized by certain peculiarities in the behavior of studied two-phase heterogeneous systems. The new feature is to focus on the chemical description of the overall process of complex formation consisting of a series of concurrent reactions, where the nature and ratio of the concentrations of chemical species, formed in such reactions, depend on the ratio of the concentrations of the metal Cu2+ and ligands, temperature and other factors (thermodynamic parameters).

Cuvinte-cheie
Ammonia, copper (II), leaching, thermodynamics, thiosulfate

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