Abstract
Germanium as a strategic metalloid is widely used in high-tech devices. The most crucial germanium resources are rare and limited to zinc minerals, i.e., especially zinc sulfides and coal-related products. Other than coals and zinc minerals, materials such as WEEEs (wastes from electrical and electronic equipment) and catalysts are considered secondary resources of germanium. Since there is no specific mineral for germanium, it should be extracted from the resources above as a by-product. Primary resources contribute to 70% of germanium production, whereas the rest is produced from recycled materials. The world refinery production of germanium enhanced by about 7% in 2020 compared to 2019. This growing demand for germanium encourages the industry to find other resources and extraction technologies. Germanium can be recovered after leaching of different resources in acidic, water, or alkaline media followed by processing using various hydro/pyrometallurgical methods. Several reviews and articles have been published to review the resources and processes for the germanium separation. However, no one did not present a final road map from feasibility views and environmental aspects. This review proposes a road map for germanium recycling based on the performance and economic availability, process efficiency, operational issues, and process feasibility.
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Abbreviations
- Aliquat 336:
-
A quaternary ammonium salt
- AMBERSEP™ IRA743:
-
A unique macroporous, weak base anion resin
- AMBERLITE™ IRA900 Cl:
-
A macro reticular polystyrene strong base anion exchange resin containing quaternary ammonium groups in styrene–divinylbenzene copolymer matrix
- AMBERLITE™ IRA958 Cl:
-
A macro reticular strongly basic anion exchange resin having quaternary ammonium functionality in a cross-linked acrylic polymer matrix
- Cat/CAT:
-
Catechol
- Cit:
-
Citric
- CTA:
-
Cetyl trimethyl ammonium
- CTAB:
-
Cetyl trimethyl ammonium bromide
- Cyanex 301:
-
Dialky1-dithiophosphinic acid
- Cyanex 923:
-
A liquid phosphine oxide
- Cyphos IL 104:
-
Trihexyl(tetradecyl)phosphonium bis-2,4,4-(trimethylpentyl)phosphinate
- D2EHPA:
-
Di-(2-Ethylhexyl) phosphoric acid
- D403:
-
Chelating resin with N-methylglucamine groups
- DOMPA:
-
Dioctyl ethylene bis phosphonic acid
- WEEE:
-
Waste from electrical and electronic equipment
- EG:
-
Ethylene glycol
- FSSLM:
-
Flat sheet supported liquid membrane
- GCFA:
-
Gasification coal fly ashes
- H106:
-
Hydroxamic acids
- HF:
-
Hollow fiber
- IGCC:
-
Integrated gasification combined cycle
- Ionquest 801:
-
2-Ethylhexyl phosphonic acid mono-2-ethylhexyl ester
- Kelex 100:
-
7-(4-Ethyl-l-methyl-octyl)-8-hydroxyquin
- L:S:
-
Liquid to solid ratio
- LED:
-
Light-emitting diode
- LIX 26:
-
Alkyl substituted 8-hydroxyquinoline
- LIX 63:
-
5,8-Diethyl-7-hydroxydodecan-6-oxime
- N235:
-
Tri (octyl–decyl) amine
- OPAP:
-
Octyl phenyl acid phosphate
- RX-1:
-
An anion-exchange membrane
- S:L:
-
Solid to liquid ratio
- ShelFlSol 2046:
-
A special Kerosene-cut with a mixture of paraffins, naphthenes, and aromatics
- T:
-
Tartaric
- TBP:
-
Tri butyl phosphate
- TOA:
-
Tri octyl amine
- TOP:
-
Tri octyl phosphate
- TOPO:
-
Tri octyl phosphine oxide
- YW100:
-
Unknown
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Kamran Haghighi, H., Irannajad, M. Roadmap for recycling of germanium from various resources: reviews on recent developments and feasibility views. Environ Sci Pollut Res 29, 48126–48151 (2022). https://doi.org/10.1007/s11356-022-20649-5
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DOI: https://doi.org/10.1007/s11356-022-20649-5