{"title":"Recovery of copper from deposit of Kola Tembein, Tigray, Ethiopia","authors":"Tesfay Negassi Gebreslasie, Goitom Gebreyohannes Berhe, Mulugeta Sisay Cheru, Gebreyohannes Gebrehiwet Tesfay","doi":"10.1007/s11243-023-00538-7","DOIUrl":null,"url":null,"abstract":"<div><p>One of the most significant sources of copper metal is malachite ore. The world's demand for copper is being positively impacted by increased extraction. However, the chemical compositions of copper in the malachite ore, which vary depending on the region, determine how well copper may be extracted. This study evaluated hydrometallurgical processing of copper metal from malachite ore of Kola Tembein, Tigray, Ethiopia. Malachite ore was processed hydrometallurgical with sulfuric acid to leach copper, which was then recovered using a cementation process of zinc metal. The samples were examined with XRD, EDXRF, SEM, and FAAS. The rock ore sample examined by XRD contained a variety of minerals, including malachite (Cu<sub>2</sub>CO<sub>3</sub>(OH)<sub>2</sub>), quartz (SiO<sub>2</sub>), albite Ca-rich (CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub>), albite disorder (NaAlSi<sub>3</sub>O<sub>8</sub>)m, etc., and the morphology of malachite ore was magnified by SEM. According to the EDXRF results, the malachite ores were dominated by metal oxides of CuO (58.21), SiO<sub>2</sub> (19.21), and Fe<sub>2</sub>O<sub>3</sub> (5.32) by weight%. Similar spectroscopic results of malachite were shown for Turkey, China, Chile, and Nigeria malachite. The leaching experiments were optimized by BBD using the RSM to leach and extract malachite at 2.6130 M H<sub>2</sub>SO<sub>4</sub>, 133.919 µm particle size, 60 °C, and 600 rpm agitation speed, with 98.159% (68,850 mg/L) copper recovered. Using the cementation process, red–brown copper metal was obtained, and waste determined by AAS having very low concentrations of copper ions (1.74 mg/L) and high concentrations of zinc ions (68,850 mg/L). Both the leaching and cementation are best in environmentally and economically, and further purification will be needed to recover zinc from the waste.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"48 4","pages":"237 - 248"},"PeriodicalIF":1.6000,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11243-023-00538-7.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transition Metal Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11243-023-00538-7","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
One of the most significant sources of copper metal is malachite ore. The world's demand for copper is being positively impacted by increased extraction. However, the chemical compositions of copper in the malachite ore, which vary depending on the region, determine how well copper may be extracted. This study evaluated hydrometallurgical processing of copper metal from malachite ore of Kola Tembein, Tigray, Ethiopia. Malachite ore was processed hydrometallurgical with sulfuric acid to leach copper, which was then recovered using a cementation process of zinc metal. The samples were examined with XRD, EDXRF, SEM, and FAAS. The rock ore sample examined by XRD contained a variety of minerals, including malachite (Cu2CO3(OH)2), quartz (SiO2), albite Ca-rich (CaAl2Si2O8), albite disorder (NaAlSi3O8)m, etc., and the morphology of malachite ore was magnified by SEM. According to the EDXRF results, the malachite ores were dominated by metal oxides of CuO (58.21), SiO2 (19.21), and Fe2O3 (5.32) by weight%. Similar spectroscopic results of malachite were shown for Turkey, China, Chile, and Nigeria malachite. The leaching experiments were optimized by BBD using the RSM to leach and extract malachite at 2.6130 M H2SO4, 133.919 µm particle size, 60 °C, and 600 rpm agitation speed, with 98.159% (68,850 mg/L) copper recovered. Using the cementation process, red–brown copper metal was obtained, and waste determined by AAS having very low concentrations of copper ions (1.74 mg/L) and high concentrations of zinc ions (68,850 mg/L). Both the leaching and cementation are best in environmentally and economically, and further purification will be needed to recover zinc from the waste.
期刊介绍：
Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc.
Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
