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Journal articles on the topic 'Leach residues'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Bhat, K. L., K. A. Natarajan, and T. Ramachandran. "Electroleaching of Zinc leach residues." Hydrometallurgy 18, no. 3 (1987): 287–303. http://dx.doi.org/10.1016/0304-386x(87)90071-5.

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2

Hodgkinson, G., R. F. Sandenberght, C. J. Hunter, and J. R. De Wet. "Pyrite flotation from gold leach residues." Minerals Engineering 7, no. 5-6 (1994): 691–98. http://dx.doi.org/10.1016/0892-6875(94)90100-7.

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3

Xiang, X. Y., X. W. Wang, Y. Q. Ma, and M. Y. Wang. "Extraction of nickel from ferromolybdenum leach residues." Canadian Metallurgical Quarterly 52, no. 2 (2013): 132–37. http://dx.doi.org/10.1179/1879139512y.0000000049.

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4

Sakharkar, Manjusha V., Jaya Sharma, R. K. Ray, and A. K. Biswas. "Characterization of synthesized wolframite minerals and their leach residues." Hydrometallurgy 44, no. 1-2 (1997): 65–69. http://dx.doi.org/10.1016/s0304-386x(96)00031-x.

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5

Benavente, Oscar, María Cecilia Hernández, Evelyn Melo, Víctor Quezada, Yan Sepúlveda, and Yuri Zepeda. "Stabilizing Arsenic in Copper Heap Leaching Residues." Metals 10, no. 9 (2020): 1242. http://dx.doi.org/10.3390/met10091242.

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The need to sustainably produce raw materials encourages mining companies to develop and incorporate new economically and environmentally efficient processes. Therefore, there is a need to investigate the behavior and stabilization of hazardous elements present in effluents from metal recovery processes such as arsenic. This study evaluates the incorporation of an effluent solution from a copper smelter that is to be treated in a copper hydrometallurgical plant (heap leaching). The treatment is applied to recover compounds of interest such as copper, acid and water, in addition to confining im

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6

Rodriguez Rodriguez, Nerea, Lieven Machiels, Bieke Onghena, Jeroen Spooren, and Koen Binnemans. "Selective recovery of zinc from goethite residue in the zinc industry using deep-eutectic solvents." RSC Advances 10, no. 12 (2020): 7328–35. http://dx.doi.org/10.1039/d0ra00277a.

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7

Liao, Y. L., G. C. Shi, F. R. Huang, and Y. Zhang. "Recovery of the valuable metals from complex converter slag at elevated temperature with sulfuric acid solution." Journal of Mining and Metallurgy, Section B: Metallurgy 55, no. 3 (2019): 359–70. http://dx.doi.org/10.2298/jmmb181024044l.

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The aim of this paper was exploring the effective utilization of nickel converter slag by means of the methodology of pressure oxidative leaching. The central composite design of response surface methodology was employed to optimize controlling conditions for the leaching of more valuable metals such as nickel, cobalt, and copper, while dissolution of iron was curbed. XRD, SEM-EDS were performed for characterizing the structure of leach residues for analyzing the mechanism of selective leaching. Experimental results demonstrate that the effects of temperature and sulfuric acid concentration on

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8

Zhou, H., L. Zhang, Y. Guo, et al. "Investigations of Attached and Unattached Cells during Bioleaching of Chalcopyrite with Acidianus Manzaensis at 65°C." Advanced Materials Research 71-73 (May 2009): 377–80. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.377.

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For the purpose of investigations of the different situations when the cells of Acidianus manzaensis can or can not attach the surface of the chalcopyrite. Three experiments were carried out in the modified shake flasks, and in one of the experiments the cells could not attach the surface of the chalcopyrite, but could participate in the solution chemistry of the process. The redox potential, pH, cell density, copper, ion and thiosulfate concentration in the solution were monitored in the experiments, and the morphological feature and chemical composition of the leached residues were analyzed

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9

Zhang, Weifeng, Zhumei Luo, and Junruo Chen. "Complex Permittivity and Microwave Absorption Properties of Zinc Oxide Leach Residues." Mineral Processing and Extractive Metallurgy Review 38, no. 5 (2017): 304–11. http://dx.doi.org/10.1080/08827508.2017.1338182.

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10

Rüşen, A., and M. A. Topçu. "Investigation of zinc extraction from different leach residues by acid leaching." International Journal of Environmental Science and Technology 15, no. 1 (2017): 69–80. http://dx.doi.org/10.1007/s13762-017-1365-4.

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11

Briceno, A., and K. Osseo-Asare. "Particulates in hydrometallurgy: Part I. Characterization of laterite acid leach residues." Metallurgical and Materials Transactions B 26, no. 1 (1995): 1123–31. http://dx.doi.org/10.1007/bf02653996.

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12

Zhang, Weifeng, Zhumei Luo, Junruo Chen, Libo Zhang, and Peng Liu. "Dielectric Properties of Zinc Oxide Leach Residues Relevant to Microwave Drying." JOM 69, no. 12 (2017): 2768–73. http://dx.doi.org/10.1007/s11837-017-2575-4.

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13

Quezada, Víctor, Oscar Benavente, Cristopher Beltrán, Danny Díaz, Evelyn Melo, and Antonio García. "Dissolution of Black Copper Oxides from a Leaching Residue." Metals 10, no. 8 (2020): 1012. http://dx.doi.org/10.3390/met10081012.

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This article presents the behavior of black copper minerals in reducing acid leaching using FeSO4 as reducing agent. The original sample, which was a blend of green and black copper minerals, was treated first by an oxidizing acid leach using O3 to dissolve the soluble phase (green copper oxides). The residue (mainly black copper) was evaluated by agitated leaching under three different solution potentials, with respect to the standard hydrogen electrode (SHE) (450, 500, and 600 mV (SHE)) at 25 °C. The original sample and the leach residue were characterized by scanning electron microscope (SE

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14

Sokić, Miroslav, Slobodan Radosavljević, Branislav Marković, et al. "Influence of chalcopyrite structure on their leaching by sodium nitrate in sulphuric acid." Metallurgical and Materials Engineering 20, no. 1 (2014): 53–60. http://dx.doi.org/10.5937/metmateng1401053s.

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During the chalcopyrite leaching by sodium nitrate and sulfuric acid solution, leaching rate decreases with increasing the time and a part of chalcopyrite mineral grains remains in the leach residue. In chalcopyrite concentrate, 95.5 % of chalcopyrite mineral occurs as in liberated grains, and the rest is in association with gangue minerals, which is very favorably from the aspect of hydrometallurgical treatment. Complex forms, like impregnations and complex intergrowths, do not exist. After experiments carried out, leaching of copper achieved 84 % at temperature 80 o C and time 240 min. In th

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15

Ismail, Suhaina, Hashim Hussin, Syed Fuad Saiyid Hashim, and Norazharuddin Shah Abdullah. "Leached Residue Characterization of Manganese-Bamboo Saw Dust Blend: An X-Ray Diffraction Study." Advanced Materials Research 1087 (February 2015): 370–73. http://dx.doi.org/10.4028/www.scientific.net/amr.1087.370.

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Manganese-bamboo sawdust leached residue (MBLR) is characterized by X-ray diffraction (XRD). The aim of this study is to evaluate the effects of leaching reaction time on the MBLR. The initial solids of low grade manganese (LGMO) ore and bamboo sawdust (BSD) as reducing agent, as well as the leach residues, were characterized. XRD analysis showed that the pyrolusite peak has not been found in the LGMO leached residue and the peak corresponding to quartz and goethite has diminished, compared to XRD peaks of initial LGMO. The calculated crystallinity of the BSD residue has decreased from 56.12%

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16

Javed, T., B. Abdul, D. Ryan, M. Raudsepp, and E. Asselin. "Amorphous iron phases in medium temperature leach residues and associated metal loss." International Journal of Mineral Processing 148 (March 2016): 65–71. http://dx.doi.org/10.1016/j.minpro.2016.01.008.

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17

Ruşen, A., A. S. Sunkar, and Y. A. Topkaya. "Zinc and lead extraction from Çinkur leach residues by using hydrometallurgical method." Hydrometallurgy 93, no. 1-2 (2008): 45–50. http://dx.doi.org/10.1016/j.hydromet.2008.02.018.

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18

Lv, Cuicui, Hao Wu, Weigang Lin, et al. "Characterization of elemental sulfur in chalcopyrite leach residues using simultaneous thermal analysis." Hydrometallurgy 188 (September 2019): 22–30. http://dx.doi.org/10.1016/j.hydromet.2019.05.020.

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19

Chen, T. T., and J. E. Dutrizac. "Mineralogical characterization of silver flotation concentrates made from zinc neutral leach residues." Metallurgical Transactions B 19, no. 5 (1988): 803–17. http://dx.doi.org/10.1007/bf02650199.

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20

Zhang, Yuanbo, Benlai Han, Zijian Su, et al. "Effect of Quartz on the Preparation of Sodium Stannate from Cassiterite Concentrates by Soda Roasting Process." Minerals 9, no. 10 (2019): 605. http://dx.doi.org/10.3390/min9100605.

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Sodium stannate (Na2SnO3) has been successfully prepared by a novel process of roasting cassiterite concentrates and sodium carbonate (Na2CO3) under CO–CO2 atmosphere, namely soda roasting-leaching process. However, more than 22 wt. % tin of the cassiterite was not converted into Na2SnO3 and entered the leach residues. Quartz (SiO2) is the predominant gangue in the cassiterite, and phase evolution of SnO2–SiO2–Na2CO3 system roasted under CO–CO2 atmosphere was still uncertain. In this study, the effect of SiO2 in cassiterite concentrates on preparation of Na2SnO3 was clarified. The results indi

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21

Vu, Nguyen, Eva Kristianová, Petr Dvořák, Tomasz Abramowski, Ivo Dreiseitl, and Aigerim Adrysheva. "Modified Leach Residues from Processing Deep-Sea Nodules as Effective Heavy Metals Adsorbents." Metals 9, no. 4 (2019): 472. http://dx.doi.org/10.3390/met9040472.

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The possible use of leaching residue from leaching deep-sea nodules in SO2/H2SO4/H2O medium as a low-cost adsorbent of heavy metals (Pb(II), Cd(II), Cu(II), Ni(II), Co(II), As(V)) was studied. The leaching residue was found to be an effective adsorbent for all of the tested elements; however, it was inactive in the solution containing As(V). The chemical activation of adsorbent in 10 vol. % HCl resulted in the greatest improvement of adsorption properties, while the activation in 10 vol. % HNO3 and heat treatment at 250 °C did not significantly affect the sorption characteristics of treated ad

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22

Dutrizac, J. E., and T. T. Chen. "Mineralogical Characterization of Leach Residues of a Pyritic Zn–Pb–Cu–Ag Concentrate." Canadian Metallurgical Quarterly 26, no. 3 (1987): 189–205. http://dx.doi.org/10.1179/cmq.1987.26.3.189.

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23

Alizadeh, Reza, Fereshteh Rashchi, and Ehsan Vahidi. "Recovery of zinc from leach residues with minimum iron dissolution using oxidative leaching." Waste Management & Research 29, no. 2 (2010): 165–71. http://dx.doi.org/10.1177/0734242x10372661.

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24

Sethurajan, Manivannan, David Huguenot, Rohan Jain, et al. "Leaching and selective zinc recovery from acidic leachates of zinc metallurgical leach residues." Journal of Hazardous Materials 324 (February 2017): 71–82. http://dx.doi.org/10.1016/j.jhazmat.2016.01.028.

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25

Acharya, S., S. Anand, and R. P. Das. "Silver losses from ammoniacal solutions on complex sulphide and chalcopyrite ammonia leach residues." International Journal of Mineral Processing 20, no. 3-4 (1987): 229–39. http://dx.doi.org/10.1016/0301-7516(87)90068-8.

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26

Briceno, A., and K. Osseo-Asare. "Particulates in hydrometallurgy: Part II. Dewatering behavior of unflocculated laterite acid leach residues." Metallurgical and Materials Transactions B 26, no. 1 (1995): 1133–38. http://dx.doi.org/10.1007/bf02653997.

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27

Briceno, A., and K. Osseo-Asare. "Particulates in hydrometallurgy: Part III. Dewatering behavior of flocculated laterite acid leach residues." Metallurgical and Materials Transactions B 26, no. 1 (1995): 1139–45. http://dx.doi.org/10.1007/bf02653998.

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28

Tawiah, Christain, Johnson Manu, Samuel Nunoo, and Ebenezer Hayford. "A comparative study of bulk leach extractable gold (BLEG) and fire assay methods on the Wassa deposit at Golden Star Limited, Wassa mine." International Journal of Basic and Applied Sciences 7, no. 1 (2018): 15. http://dx.doi.org/10.14419/ijbas.v7i1.8267.

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Golden Star Resources Limited conducts Bulk Leach Extractable Gold (BLEG) and Fire Assay methods on samples from its exploration program. Additionally, for mining control and as part of the sampling and analytical protocol, residues of samples whose assay values are greater than 10 g/t are subjected to fire assay to determine the quantity of gold. However, there is gold retained in the tails or residue after leaching and to verify the suitability and efficiency of the analytical method, drill samples (RC and DD) with control samples were analysed using BLEG method based on the accelerated cyan

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29

Safarzadeh, M. Sadegh, Mark Horton, and Adrian D. Van Rythoven. "Review of Recovery of Platinum Group Metals from Copper Leach Residues and Other Resources." Mineral Processing and Extractive Metallurgy Review 39, no. 1 (2017): 1–17. http://dx.doi.org/10.1080/08827508.2017.1323745.

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30

De Wet, J. R., G. Hodgkinson, P. C. Pistorius, L. C. Prinsloo, and R. F. Sandenbergh. "The influence of cyanide on the flotation of pyrite from Witwatersrand gold leach residues." Minerals Engineering 8, no. 11 (1995): 1333–45. http://dx.doi.org/10.1016/0892-6875(95)00100-5.

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31

Mbuya, Bienvenu Ilunga, Méschac-Bill Kime, Patrick Tshibanda Ntakamutshi, et al. "Evaluation of Flocculation and Settling Behavior of Leach Residues: Contribution of Principal Component Analysis." Journal of Sustainable Metallurgy 4, no. 4 (2018): 485–92. http://dx.doi.org/10.1007/s40831-018-0197-x.

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32

Rämä, Minna, Samu Nurmi, Ari Jokilaakso, Lassi Klemettinen, Pekka Taskinen, and Justin Salminen. "Thermal Processing of Jarosite Leach Residue for a Safe Disposable Slag and Valuable Metals Recovery." Metals 8, no. 10 (2018): 744. http://dx.doi.org/10.3390/met8100744.

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In electrolytic production of zinc, the iron levels in the solutions are controlled by precipitation of jarosite or goethite. These precipitates also co-precipitate unrecovered valuable metals (Zn, Pb, Cu, Ag) as well as elements of concern (As, Cd, Hg). After stabilization, the residues are traditionally landfilled. This work investigates pyrometallurgical treatment of jarosite residue to convert the material into reusable clean slag and to recover the valuable metals within the residue. The pyrometallurgical treatment is divided into two functional steps. First, the material is melted in an

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33

de Wet, J. R., P. C. Pistorius, and R. F. Sandenbergh. "The influence of cyanide on pyrite flotation from gold leach residues with sodium isobutyl xanthate." International Journal of Mineral Processing 49, no. 3-4 (1997): 149–69. http://dx.doi.org/10.1016/s0301-7516(96)00031-2.

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34

TOPKAYA, Y. A., I. KARAKAYA, and G. ÖZBAYOGˇLU. "Potential Recovery of Germanium from Leach Residues and Electrolyte Purification Precipitates of Turkish Zinc Plant." Mineral Processing and Extractive Metallurgy Review 10, no. 1 (1992): 281–89. http://dx.doi.org/10.1080/08827509208914091.

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35

Silwamba, Marthias, Mayumi Ito, Naoki Hiroyoshi, et al. "Recovery of Lead and Zinc from Zinc Plant Leach Residues by Concurrent Dissolution-Cementation Using Zero-Valent Aluminum in Chloride Medium." Metals 10, no. 4 (2020): 531. http://dx.doi.org/10.3390/met10040531.

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Zinc plant leach residues (ZPLRs) contain significant amounts of metal compounds of lead (Pb), zinc (Zn), iron (Fe), etc., hence, they are considered as a secondary source of metals. On the other hand, ZPLRs are regarded as hazardous materials because they contain heavy metals that pollute the environment. Resources and environmental concerns of ZPLRs were addressed in this study by removing/recovering Pb and Zn using a concurrent dissolution and cementation technique. To cement the dissolved Pb and Zn in leaching pulp, zero-valent aluminum (ZVAl) was added during ZPLRs leaching in the hydroch

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36

Ma, Bin, Zhao Hui Huang, Ming Hao Fang, Yang Ai Liu, and Shu Sen Chen. "Preparation of Porous Silicon by Magnesiothermic Reduction from Serpentine." Key Engineering Materials 544 (March 2013): 29–33. http://dx.doi.org/10.4028/www.scientific.net/kem.544.29.

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In order to obtain the porous silicon, amorphous silica was prepared from serpentine by leaching experiment The XRF results shows that the leach residues almost compose of amorphous silica, the content is 92.37%, via magnesiothermic reduction, The XRD results shows the amorphous silica was reduced to porous crystal silicon successfully and The SEM results shows they have similar morphology. One of the most important properties of porous silicon was characterized by PL and with an excitation at 365 nm. an emission centered in the blue region.

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37

Li, Xing Bin, Chang Wei, Zhi Gan Deng, Min Ting Li, Cun Xiong Li, and Hong Sheng Xu. "Acid Leaching of Vanadium from a Vanadium Residue." Advanced Materials Research 402 (November 2011): 243–48. http://dx.doi.org/10.4028/www.scientific.net/amr.402.243.

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A process has been developed at the laboratory scale for leaching of vanadium from a vanadium residue using mixed hydrofluoric and sulfuric acid solutions, and NaClO as an oxidant. The extraction studies were carried out using various acid concentrations, liquid/solid ratios, addition of oxidant, reaction temperatures and leaching times. The optimum leaching conditions were then determined. Characterization of the leach residues was carried out by SEM and EDS analysis. Results indicate that the silicates can be effectively destroyed by HF, and the vanadium contained in the vanadium-iron spinel

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38

Zhang, Ruiyang, Chunbao Sun, Jue Kou, Hongyu Zhao, Dezhou Wei, and Yi Xing. "Enhancing the Leaching of Chalcopyrite Using Acidithiobacillus ferrooxidans under the Induction of Surfactant Triton X-100." Minerals 9, no. 1 (2018): 11. http://dx.doi.org/10.3390/min9010011.

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Chalcopyrite is the richest copper sulfide mineral in the world, but it is also the most resistant to biohydrometallurgical processing. To promote the bioleaching of chalcopyrite, a nonionic surfactant, t-octyl phenoxy polyethoxy ethanol (Triton X-100), was employed in this paper. Action of Triton X-100 in chalcopyrite leaching using Acidithiobacillus ferrooxidans was explored in shake flasks. Results showed that 30 mg·L−1 of Triton X-100 increased the bioleaching yield of copper by 42.21% compared to the process without additive after 24 days. Under the stress of Triton X-100, the bioleaching

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39

Bezuidenhout, G. A., J. J. Eksteen, G. Akdogan, S. M. Bradshaw, and J. P. R. De Villiers. "Pyrometallurgical upgrading of PGM-rich leach residues from the Western Platinum base metals refinery through roasting." Minerals Engineering 53 (November 2013): 228–40. http://dx.doi.org/10.1016/j.mineng.2013.04.002.

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40

Silwamba, Marthias, Mayumi Ito, Naoki Hiroyoshi, et al. "Detoxification of lead-bearing zinc plant leach residues from Kabwe, Zambia by coupled extraction-cementation method." Journal of Environmental Chemical Engineering 8, no. 4 (2020): 104197. http://dx.doi.org/10.1016/j.jece.2020.104197.

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41

Janković, Bojan, Srećko Stopić, Aybars Güven, and Bernd Friedrich. "Kinetic modeling of thermal decomposition of zinc ferrite from neutral leach residues based on stochastic geometric model." Journal of Magnetism and Magnetic Materials 358-359 (May 2014): 105–18. http://dx.doi.org/10.1016/j.jmmm.2014.01.046.

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42

Catalan, Lionel J. J., and Michael G. Li. "Decommissioning of Copper Heap-Leach Residues by Rinsing with Water and Alkaline Solutions - A Pilot Scale Study." Environmental Engineering Science 17, no. 4 (2000): 191–202. http://dx.doi.org/10.1089/10928750050137534.

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43

Patton, Aaron J., Gail E. Ruhl, Tom C. Creswell, et al. "Potential Damage to Sensitive Landscape Plants from Wood Chips of Aminocyclopyrachlor Damaged Trees." Weed Technology 27, no. 4 (2013): 803–9. http://dx.doi.org/10.1614/wt-d-13-00066.1.

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Applications of aminocyclopyrachlor in 2011 to turf resulted in brown and twisted shoots, leaves, and needles; shoot dieback; and in some cases, death of trees and ornamental plants adjacent to treated turf areas. Our research objective was to determine if a sensitive plant could be injured from wood chips (mulch) obtained from aminocyclopyrachlor-damaged trees, and to quantify movement of aminocyclopyrachlor from contaminated wood chips into soil and its subsequent uptake by roots into landscape plant tissues. Tomatoes were grown under greenhouse conditions and mulched with chipped tree branc

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44

Hemming, N. J., D. J. Anstee, W. J. Mawby, M. E. Reid, and M. J. Tanner. "Localization of the protein 4.1-binding site on human erythrocyte glycophorins C and D." Biochemical Journal 299, no. 1 (1994): 191–96. http://dx.doi.org/10.1042/bj2990191.

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The flexibility of the human erythrocyte membrane is mediated by an underlying network of skeletal proteins which interact with the membrane through ankyrin and protein 4.1. The nature of the membrane attachment site(s) for protein 4.1 has yet to be fully elucidated. In this paper we show that purified protein 4.1 binds much less strongly to alkali-stripped membranes from erythrocytes of individuals with total glycophorin C and D deficiency (Leach phenotype) than to alkali-stripped normal membranes. We further show that a synthetic peptide corresponding to amino acid residues 82-98 of the cyto

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45

Zhang, Kuifang, Zhiqiang Liu, Yi Liu, Hongyang Cao, and Wei Zhu. "Recovery of gallium from strong acidic sulphate leach solutions of zinc refinery residues using a novel phosphate ester extractant." Hydrometallurgy 185 (May 2019): 250–56. http://dx.doi.org/10.1016/j.hydromet.2019.03.001.

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46

Zhang, Kuifang, Lili Qiu, Jinzhang Tao, et al. "Recovery of gallium from leach solutions of zinc refinery residues by stepwise solvent extraction with N235 and Cyanex 272." Hydrometallurgy 205 (November 2021): 105722. http://dx.doi.org/10.1016/j.hydromet.2021.105722.

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47

SINGLETON, G. A., and L. M. LAVKULICH. "USE OF ACETIC ACID IN SOXHLET WEATHERING PROCEDURES." Canadian Journal of Soil Science 67, no. 3 (1987): 585–90. http://dx.doi.org/10.4141/cjss87-054.

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Modified soxhlet extractors using 0.3 M acetic acid were used to leach parent material from a sandy soil. Three extractors were run at a low leaching rate of 2.2 L d−1 and three others at a high leaching rate of 4.3 L d−1 for a total of 8 wk. Soil residues, leachates, suspended sediments and adhered precipitates on the sides of the collection flasks were analyzed for basic cations and Fe, Al and Si. Leaching reduced original sample weights 2.1% and 6.0% for the low and high rates, respectively, and resulted in podzolic weathering for both treatments. Although the low and high leaching rates di

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48

Quezada, Víctor, Antoni Roca, Oscar Benavente, Montserrat Cruells, and Evelyn Melo. "The Effects of Sulphuric Acid and Sodium Chloride Agglomeration and Curing on Chalcopyrite Leaching." Metals 11, no. 6 (2021): 873. http://dx.doi.org/10.3390/met11060873.

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An option to improve the leaching efficiency of chalcopyrite is pretreatment prior to leaching. Pretreatment variables, such as the curing time and the addition of chloride, can increase the kinetics of copper extraction, particularly for sulphide ores. However, there has been little research on the topic. The reactions that govern this phenomenon have not been clearly identified. In this study, the effects of sulphuric acid and sodium chloride agglomeration and curing on chalcopyrite leaching were evaluated at various temperatures: 25, 50, 70, and 90 °C. The pretreated ore and leach residues

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49

Sethurajan, Manivannan, Piet NL Lens, Eldon R. Rene, et al. "Bioleaching and selective biorecovery of zinc from zinc metallurgical leach residues from the Três Marias zinc plant (Minas Gerais, Brazil)." Journal of Chemical Technology & Biotechnology 92, no. 3 (2016): 512–21. http://dx.doi.org/10.1002/jctb.5026.

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Cheng, Baohai, Ting’an Zhang, Kuifang Zhang, Zuoying Cao, and Li Zeng. "Recovery of germanium from acid leach solutions of zinc refinery residue using an oxime extractant of HBL101." Metallurgical Research & Technology 115, no. 5 (2018): 510. http://dx.doi.org/10.1051/metal/2018037.

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Abstract:

An oxime extractant of HBL101 was used to extract germanium from acid leach solutions of zinc refinary residues. The effect of acidity on extraction was investigated. Germanium was extracted from a sulphate acid solution with not too high acidity (1.0∼1.2 mol/L H2SO4), while zinc, cadmium, iron, gallium and arsenic were not extracted. Only small amount of copper was co-extracted. The germanium was readily stripped from the loaded organic solution with NaOH solutions. After germanium stripping, the co-extracted copper can be stripped using 2 mol/L H2SO4 while the extractant regenerated for recy

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