Solubility of Germanium Dioxide in Commonly Used Acids—Effect of Acid Strength, Temperature, and Water Activity

Feldmann, Thomas; Nosrati, S. Attar; Belanger, Frederic

doi:10.1007/978-3-319-95022-8_209

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Sulphuric acid was required to decompose mixed germaniumzinc and germanium-indium oxides present in the dross. On the other hand, the solubility of GeO2, which was one of the decomposition products, decreased as the H2SO4 concentration increased [43,44]. This form of germanium was present in the residue.…”

Section: Discussionmentioning

confidence: 98%

Germanium and Indium Recovery from Zinc Metallurgy by-Products—Dross Leaching in Sulphuric and Oxalic Acids

Drzazga

Prajsnar

Chmielarz

et al. 2018

Metals

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Leaching of the dross containing 28.7% Sn, 18.0 Pb, 10.6% Cu, 8.9% Ge, 8.1% Zn, and 2.7% In in sulphuric and oxalic acid solution was investigated. The dross was obtained from thermal oxidation of by-product alloy generated during a New Jersey (NJ) zinc rectification process. The influence of different process conditions (temperature, time, acid concentration, and solid to liquid ratio) on leaching yield of the main components was determined. Additionally, the impact of oxidant (hydrogen peroxide, sodium hypochlorite, manganese (IV) oxide) addition on leachabilities was investigated. Germanium leaching yields exceeding 80% were observed for both sulphuric and oxalic acid solutions. Indium leachability in H 2 C 2 O 4(aq) was found at the level of 20%, while in H 2 SO 4(aq) , it strongly depends on process temperature, and reached 80% at 80 • C.

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Section: Discussionmentioning

confidence: 98%

Germanium and Indium Recovery from Zinc Metallurgy by-Products—Dross Leaching in Sulphuric and Oxalic Acids

Drzazga

Prajsnar

Chmielarz

et al. 2018

Metals

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“…Germanium oxide cannot be dissolved in any acid in substantial amounts. [24,25] However, the solubility of germanium oxide in aqueous ammonia reaches 16 g GeO 2 /100 g H 2 O. [26] In such solutions precipitates form upon addition of acid to slightly acidic pH (pH 2-7), [27][28][29] but if the pH is rapidly adjusted to values below 2 the germanium remains dissolved.…”

Section: Resultsmentioning

confidence: 99%

A One‐Step Synthesis of Dispersed Bismuth Orthogermanate Powder and its Performance for Alpha‐ and Gamma‐Radiation Detection

et al. 2023

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Bismuth orthogermanate Bi4Ge3O12 (BGO) powder with morphology suitable for production of cheap new generation detectors was obtained in a one‐step room temperature co‐precipitation process. The influence of synthesis parameters on the phase composition and morphology of the product was systematically studied via powder diffraction and scanning electron microscopy methods. The obtained BGO powder was shown to have ∼50 % decreased flash time compared to a single crystal in the case of both α‐ and γ‐produced scintillation. For α‐produced scintillation share of the slow luminescent component decreased from 35 to 10 %, too. Such improved spectral‐kinetic characteristics provide better time and space detectors resolution and allows one to reduce radiation exposure for tomography patients.

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Leaching Behaviors of Germanium, Zinc and Iron from Germanium Distillation Residues by Water Leaching Followed by Alkaline Leaching

Wang,

Wu,

Jin

et al. 2024

JOM

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Solubility of Germanium Dioxide in Commonly Used Acids—Effect of Acid Strength, Temperature, and Water Activity

Cited by 3 publications

References 12 publications

Germanium and Indium Recovery from Zinc Metallurgy by-Products—Dross Leaching in Sulphuric and Oxalic Acids

Germanium and Indium Recovery from Zinc Metallurgy by-Products—Dross Leaching in Sulphuric and Oxalic Acids

A One‐Step Synthesis of Dispersed Bismuth Orthogermanate Powder and its Performance for Alpha‐ and Gamma‐Radiation Detection

Leaching Behaviors of Germanium, Zinc and Iron from Germanium Distillation Residues by Water Leaching Followed by Alkaline Leaching

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