Ecofriendly leaching agents for copper extraction-An overview of amino and organic acid applications

Abstract

The green transition’s push for electrification has substantially increased the demand for copper, making it a critical raw material. This extravagant demand has made it profitable to extract copper from low-grade sulfide ores, which contain less than 0.3wt% copper. However, processing such low-grade ores requires extensive amounts of chemicals, raising environmental concerns. Thus, several investigations have been conducted on non-traditional lixiviants for copper extraction. Surprisingly, few studies have comprehensively reviewed this area to provide a comprehensive understanding and highlight gaps. This review analyzes investigations that have worked on the leaching process of copper into solutions using environmentally friendly reagents, particularly organic acids and amino acids, and compare them to conventional inorganic acids and examines recent advancements in ecofriendly leaching agents, specifically their application in copper leaching. The primary objective is to highlight the significance of these green reagents in mobilizing copper from solid to solution phases. It was highlighted that factors, such as mineralogy, mechanical activation, impurities, particle size, temperature, and initial concentration of the leaching agent, influence the leaching efficiency of organic and amino acids from primary and secondary copper resources. These variables interact in more complex ways than those encountered with conventional leaching methods. Research in this area has shown promising results, both in terms of extraction efficiency and reduced environmental impact, making it an exciting and essential area for further exploration and development. This shift towards using nonconventional lixiviants represents a significant step forward in the quest for more sustainable and environmentally responsible mining practices and recycling processes.

Keywords

Copper / Leaching / Ecofriendly acids / Glycine / Glutamic acid / Organic acids

References

[1] International Copper Study Group (ICSG), Copper: Preliminary Data for September 2020, ICSG, Lisbon, Portugal, 2020.

[2] J. Doebrich, Copper-A metal for the ages, U.S. Geological Survey, 2009.

[3] K.C. Misra, Understanding Mineral Deposits, Springer, Dordrecht, 2012.

[4] M.E. Schlesinger, K.C. Sole, W.G. Davenport, G.R.A. Flores, Extractive Metallurgy of Copper, Elsevier, 2021.

[5] Z.H. Ren, P. Krishnamoorthy, P.Z. Sanchez, E. Asselin, D.G. Dixon, N. Mora, Catalytic effect of ethylene thiourea on the leaching of chalcopyrite, Hydrometallurgy 196 (2020) 105410.

[6] S.H. Yin, L.M. Wang, A.X. Wu, X. Chen, R.F. Yan, Research progress in enhanced bioleaching of copper sulfides under the intervention of microbial communities, Int. J. Miner. Metall. Mater. 26 (11) (2019) 1337-1350.

[7] R.P. Hackl, D.B. Dreisinger, E. Peters, J.A. King, Passivation of chalcopyrite during oxidative leaching in sulfate media, Hydrometallurgy 39 (1-3) (1995) 25-48.

[8] B.C. Tanda, J.J. Eksteen, E.A. Oraby, An investigation into the leaching behaviour of copper oxide minerals in aqueous alkaline glycine solutions, Hydrometallurgy 167 (2017) 153-162.

[9] Statista, Refined copper usage worldwide from 2010 to 2022, Statista, 2023. 〈 https://www.statista.com/statistics/267849/global-copper-consumption/〉 (Accessed September 2023).

[10] International World Copper Council (IWCC), Major End Uses of Copper Worldwide Report, IWCC, 2023.

[11] E. Ebrahimi, H. Safari, M. Rezaee, A. Rezaei, H. Abdollahi, An environmentally friendly method for extraction of cobalt and molybdenum from spent catalysts using deep eutectic solvents (DESs), Environ. Sci. Pollut. Res. Int. 30 (39) (2023) 90243-90255.

[12] D. Feng, J.S.J. van Deventer, The role of amino acids in the thiosulphate leaching of gold, Miner. Eng. 24 (9) (2011) 1022-1024.

[13] H. Li, Z.X. Deng, E. Oraby, J. Eksteen, Amino acids as lixiviants for metals extraction from natural and secondary resources with emphasis on glycine: a literature review, Hydrometallurgy 216 (2023) 106008.

[14] H. Li, E. Oraby, J. Eksteen, Extraction of copper and the co-leaching behaviour of other metals from waste printed circuit boards using alkaline glycine solutions, Resour. Conserv. Recycl. 154 (2020) 104624.

[15] M. Rezaee, R. Saneie, A. Mohammadzadeh, H. Abdollahi, M. Kordloo, A. Rezaee, E. Vahidi, Eco-friendly recovery of base and precious metals from waste printed circuit boards by step-wise glycine leaching: process optimization, kinetics modeling, and comparative life cycle assessment, J. Clean. Prod. 389 (2023) 136016.

[16] I. Jamett, P. Carrasco, M. Olmos, P. Hernández, Glycine/glutamate: “green” alternatives to recover metals from minerals/residues-Review of current research, Minerals 13 (1) (2022) 22.

[17] S. Kostudis, K. Bachmann, S. Kutschke, K. Pollmann, J. Gutzmer, Leaching of copper from Kupferschiefer by glutamic acid and heterotrophic bacteria, Miner. Eng. 75 (2015) 38-44.

[18] E. Prasetyo, C. Anderson, F. Nurjaman, M. Al Muttaqii, A.S. Handoko, F. Bahfie, F.R. Mufakhir, Monosodium glutamate as selective lixiviant for alkaline leaching of zinc and copper from electric arc furnace dust, Metals 10 (5) (2020) 644.

[19] C.G. Perea, O.J.R. Baena, C.F. Ihle, H. Estay, Copper leaching from wastes electrical and electronic equipment (WEEE) using alkaline monosodium glutamate: thermodynamics and dissolution tests, Clean. Eng. Technol. 5 (2021) 100312.

[20] B. Musariri, G. Akdogan, C. Dorfling, S. Bradshaw, Evaluating organic acids as alternative leaching reagents for metal recovery from lithium ion batteries, Miner. Eng. 137 (2019) 108-117.

[21] M.A. Razak, P.S. Begum, B. Viswanath, S. Rajagopal, Multifarious beneficial effect of nonessential amino acid, glycine: a review, Oxid. Med. Cell Longev. 2017 (2017) 1716701.

[22] D.M. Muir, A review of the selective leaching of gold from oxidised copper-gold ores with ammonia-cyanide and new insights for plant control and operation, Miner. Eng. 24 (6) (2011) 576-582.

[23] H. Mokhlis, R. Drissi Daoudi, M. Azzi, Study of the electrochemical behavior of printed circuit boards (PCBs) leaching solutions using glycine and copper recovery by electrodeposition from leachate solutions, Mater. Today Proc. 37 (2021) 3973-3979.

[24] M. Rezaee, S.Z. Shafaei, H. Abdollahi, S. Mohammadnejad, A. Mabudi, An experimental and DFT study on using the thiosulfate-glycine complex as an alternative agent of cyanide in the gold leaching process, J. Sustain. Metall. 9 (3) (2023) 1239-1252.

[25] M. Sarvar, Z. Shafaei Tonkaboni, M. Noaparast, A.R. Badiei, A. Amiri, Application of amino acids for gold leaching: effective parameters and the role of amino acid structure, J. Clean. Prod. 391 (2023) 136123.

[26] G.C. Barrett, Chemistry and Biochemistry of the Amino Acids, Springer, Dordrecht, 2012.

[27] F. Faraji, J.X. Wang, H. Mahandra, A. Ghahreman, A green and sustainable process for the recovery of gold from low-grade sources using biogenic cyanide generated by Bacillus megaterium: a comprehensive study , ACS Sustain. Chem. Eng. 9 (1) (2021) 236-245.

[28] F. Wissing, Cyanide formation from oxidation of glycine of Pseudomonas species, J. Bacteriol. 117 (3) (1974) 1289-1294.

[29] Global Sources, 2021. 〈 https://www.globalsources.com/?utm_source=1907412&source=1907412&gad_source=1&gclid=CjwKCAjw_4S3BhAAEiwA_64YhuTFGejsBUTYt_iuycYAfs0DLC20toLWcHtrIKE7jBXhGRPDIUpdvxoC2BIQAvD_BwE〉.

[30] B.C. Tanda, Glycine as a Lixiviant for the Leaching of Low Grade Copper-gold Ores (Dissertation), Curtin University, Perth, Australia, 2017.

[31] F.H. Al-Jeboori, T.A. Mussa Al-Shimiesawi, O.M. Noori Jassim, Synthesis and characterization of some essential amino acid metal complexes having biological activity, J. Chem. Pharm. Res. 5 (10) (2013) 172-176.

[32] E.A. Oraby, J.J. Eksteen, The selective leaching of copper from a gold-copper concentrate in glycine solutions, Hydrometallurgy 150 (2014) 14-19.

[33] E.A. Oraby, J.J. Eksteen, B.C. Tanda, Gold and copper leaching from gold-copper ores and concentrates using a synergistic lixiviant mixture of glycine and cyanide, Hydrometallurgy 169 (2017) 339-345.

[34] M. Battur, Geometallurgical Study of Copper Whole Ore from an Open Pit Mine with Various Leaching Systems (Dissertation), University of Arizona, Tucson, USA, 2021.

[35] S. Aksu, F.M. Doyle, Electrochemistry of copper in aqueous glycine solutions, J. Electrochem. Soc. 148 (1) (2001) B51-B57.

[36] J.J. Eksteen, E.A. Oraby, B.C. Tanda, A conceptual process for copper extraction from chalcopyrite in alkaline glycinate solutions, Miner. Eng. 108 (2017) 53-66.

[37] G.M. O’Connor, K. Lepkova, J.J. Eksteen, E.A. Oraby, Electrochemical behaviour of copper in alkaline glycine solutions, Hydrometallurgy 181 (2018) 221-229.

[38] I. Barton, J. Ahn, J. Lee, Mineralogical and metallurgical study of supergene ores of the Mike CuAu(Zn) deposit, Carlin trend, Nevada, Hydrometallurgy 176 (2018) 176-191.

[39] J. Ahn, I.F. Barton, D. Shin, J. Lee, The study of copper leaching from conichalcite and chalcopyrite using alternative lixiviants, in: G. Lambotte, J. Lee, A. Allanore, S. Wagstaff (Eds.), Materials Processing Fundamentals 2018. TMS 2018. The Minerals, Metals & Materials Series, Springer, Cham, 2018, pp. 171-180.

[40] B.C. Tanda, J.J. Eksteen, E.A. Oraby, Kinetics of chalcocite leaching in oxygenated alkaline glycine solutions, Hydrometallurgy 178 (2018) 264-273.

[41] D. Shin, J. Ahn, J. Lee, Kinetic study of copper leaching from chalcopyrite concentrate in alkaline glycine solution, Hydrometallurgy 183 (2019) 71-78.

[42] B.C. Tanda, J.J. Eksteen, E.A. Oraby, G.M. O’Connor, The kinetics of chalcopyrite leaching in alkaline glycine/glycinate solutions, Miner. Eng. 135 (2019) 118-128.

[43] M. Khezri, B. Rezai, A. Akbar Abdollahzadeh, M. Molaeinasab, B.P. Wilson, M. Lundström, Glycine leaching of Sarcheshmeh chalcopyrite concentrate at high pulp densities in a stirred tank reactor, Miner. Eng. 157 (2020) 106555.

[44] M. Khezri, B. Rezai, A.A. Abdollahzadeh, B.P. Wilson, M. Molaeinasab, M. Lundström, Investigation into the effect of mechanical activation on the leaching of chalcopyrite in a glycine medium, Hydrometallurgy 203 (2021) 105492.

[45] D. Dreisinger, Copper leaching from primary sulfides: options for biological and chemical extraction of copper, Hydrometallurgy 83 (1-4) (2006) 10-20.

[46] S. Dasarathy, R.P. Mookerjee, V. Rackayova, V. Rangroo Thrane, B. Vairappan, P. Ott, C.F. Rose, Ammonia toxicity: from head to toe? Metab. Brain Dis. 32 (2) (2017) 529-538.

[47] M. Allameh, M.R. Hosseini, E. Azimi, Development of a sustainable alternative for the ammoniacal cyanidation of copper-gold ores through a biological approach, J. Sustain. Metall. 6 (4) (2020) 796-808.

[48] D. Medina, C.G. Anderson, A review of the cyanidation treatment of copper-gold ores and concentrates, Metals 10 (7) (2020) 897.

[49] E.Y. Yazici, F. Ahlatci, E. Koc, O. Celep, H. Deveci, Pre-treatment of a copper-rich gold ore for elimination of copper interference, in: 8th European Metallurgical Conference, Düsseldorf, 2015, pp. 601-613.

[50] E.A. Oraby, J.J. Eksteen, Gold leaching in cyanide-starved copper solutions in the presence of glycine, Hydrometallurgy 156 (2015) 81-88.

[51] B.C. Tanda, E.A. Oraby, J.J. Eksteen, Kinetics of malachite leaching in alkaline glycine solutions, Miner. Process. Extr. Metall. 130 (1) (2021) 16-24.

[52] L. Sohbatzadeh, S. Shafaei Tonkaboni, M. Noaparast, A. Entezari-Zarandi, A comparative study of malonic and l-glutamic acids for metal leaching from spent lithium-ion batteries: Kinetic and optimization analysis, Minerals 13 (8) (2023) 1104.

[53] P. Meshram, A. Mishra, Abhilash, R. Sahu, Environmental impact of spent lithium ion batteries and green recycling perspectives by organic acids-a review, Chemosphere 242 (2020) 125291.

[54] S. Doores, Organic acids, Food Sci. Technol. N. Y. -Marcel Dekker 145 (2005) 91.

[55] D. Das, S. Mukherjee, M.G. Chaudhuri, Studies on leaching characteristics of electronic waste for metal recovery using inorganic and organic acids and base, Waste Manag. Res. J. Sustain. Circ. Econ. 39 (2) (2021) 242-249.

[56] M.A. Shabani, M. Irannajad, A.R. Azadmehr, Investigation on leaching of malachite by citric acid, Int. J. Miner. Metall. Mater. 19 (9) (2012) 782-786.

[57] A. Yaras, H. Arslanoglu, Leaching behaviour of low-grade copper ore in the presence of organic acid, Can. Metall. Q. 57 (3) (2018) 319-327.

[58] M.D. Turan, Z.A. Sarı, H. Nizamoğlu, Pressure leaching of chalcopyrite with oxalic acid and hydrogen peroxide, J. Taiwan Inst. Chem. Eng. 118 (2021) 112-120.

[59] P. Meshram, L. Bhagat, U. Prakash, B.D. Pandey, Abhilash, Organic acid leaching of base metals from copper granulated slag and evaluation of mechanism, Can. Metall. Q. 56 (2) (2017) 168-178.

[60] X. Ke, F.J. Zhang, Y. Zhou, H.J. Zhang, G.L. Guo, Y. Tian, Removal of Cd, Pb, Zn, Cu in smelter soil by citric acid leaching, Chemosphere 255 (2020) 126690.

[61] N. Habbache, N. Alane, S. Djerad, L. Tifouti, Leaching of copper oxide with different acid solutions, Chem. Eng. J. 152 (2-3) (2009) 503-508.

[62] R. Torres, B. Segura-Bailón, G.T. Lapidus, Effect of temperature on copper, iron and lead leaching from e-waste using citrate solutions, Waste Manag. 71 (2018) 420-425.

[63] N. Nagarajan, P. Panchatcharam, Cost-effective and eco-friendly copper recovery from waste printed circuit boards using organic chemical leaching, Heliyon 9 (3) (2023) e13806.

[64] M. Kolenčík, M. Urík, S. Čerňanský, M. Molnárová, P. Matúš, Leaching of zinc, cadmium, lead and copper from electronic scrap using organic acids and the Aspergillus niger strain , Fresenius Environ. Bull. 22 (12a) (2013) 3673-3679.

[65] K. Gargul, B. Boryczko, A. Bukowska, P. Jarosz, S. Małecki, Leaching of lead and copper from flash smelting slag by citric acid, Arch. Civ. Mech. Eng. 19 (3) (2019) 648-656.

[66] R. Torres, G.T. Lapidus, Copper leaching from electronic waste for the improvement of gold recycling, Waste Manag. 57 (2016) 131-139.

[67] M.K. Tanaydın, N. Demirkıran, A. Ekmekyapar, Kinetic model of copper leaching from a malachite ore by acetic acid solutions, J. Chem. Technol. Metall. 55 (2020) 852-859.