Gold recovery pdf. 38 μm) does not improve the recovery of gold .

Gold recovery pdf Meanwhile, sample B could produce 98. March It was revealed that the chemical pretreatment improves the gold extraction yield and favours a low consumption of reagents: after cyanidation low recovery has been obtained without pretreatment Žabout 30% Au. ACTIVATED CARBON IN GOLD RECOVERY John Rogans Marketing Director Kemix (Pty) The document discusses the Merrill-Crowe process for recovering gold from cyanide solutions using zinc precipitation. pdf. Separating dissolved gold via The document provides instructions for safely recovering gold from electronic parts in 12 steps. It discusses how their products maximize gold loading and yields through high adsorption capacities, rates, and hardness. Different processes were used for its recovery: panning, amalgamation, chlorination, and cyanidation. 5–10. Precipitation Ž%Au. 64% of gold recovery. 10). 38 μm) does not improve the recovery of gold View Kemix AC in Au recovery. Nov 30, 2015 Download as PPTX, PDF 13 likes 8,760 views. 8. It emphasizes safety precautions like proper protective equipment. Due to the stable chemical characteristic of gold and particular difficulties asso- Mar 26, 2021 · Download full-text PDF Read full-text. • Source material supply not limiting. 9 RELATED SERVICES arbon activated corporation 2250 South Central Avenue Compton, California 90220 t 310 885-4555 f 310 885-4558 Industrial & Engineering Chemistry Research, 2014. Figure 2 shows the dependence of gold recovery on changing pH values while other parameters are kept constant. Amalgamation (with mercury) 2. 4–9. Some of the most effective parameters on cyanidation process are concentration of cyanide, solid weight percent, pH, particle size, dissolved oxygen, retention time and agitation speed. Gold Recovery - Free download as Word Doc (. 38,39 These inclusion complexes form when water molecules are displaced from the cyclodextrin cavity by more Nov 30, 2015 · Bioleaching gold recovery - Download as a PDF or view online for free. Johnson (1894). Earlyminersrecov- ered no more than 60% ofassayedgold values, and as late as1945recoveryof free gold averaged only 70-75% (Spill- Placer Gold Recovery Methods - Free download as PDF File (. However, gradual shift towards cyanide-free gold processes also requires new developments in the recovery technologies. D. This recovery begins when the leach filtrate is sent to the carbon columns, CIC-401, via Stream 29. This document discusses activated carbon and its use in gold recovery processes. , CIP/CIL) are by far dominating the recovery of gold from leaching solutions, especially in cyanide media. 0. The understanding of the mechanism of gold adsorption is important because the CIP/CIL processes work as A series of mineral separation and gold recovery tests were carried out in the laboratory using a commercially produced, laboratory scale Wilfley table ( a type of shaking table). Mar 1, 2022 · They promote: i) the oxidation of the sulphide matrix, rendering gold more accessible to the leaching solution; ii) gold stabilisation, a result of the formation of gold-rich complexes and/or colloids; and iii) gold solubilisation by enhancing the permeability of ore bodies (Amachi, 2008; Brehm et al. DIY : Step by step instructions for Gold Recovery from old and unused Electronics equipment like Mobile phone, Camera, Computer accessories etc. It details obtaining necessary safety equipment, chemicals, and tools. 8 to a range of 9. 7). It has been successful globally with units in South Africa, Tanzania, Ghana, Mali, and the USA. Available via license: CC BY-NC-SA 4. It is possible to observe that 86. Aug 1, 2022 · develop a gold recovery process compa rable to the cyanidation carbon in the pulp process. Keywords: Gold cyanidation; Leaching; Reaction kinetics; Modeling The chemistry of gold dissolution in alkaline cyanide solution has continually received attention and new rate equations expressing the gold leaching are still developed. The most significant characteristic of gold cyanide pregnant solutions is their gold content, which depends on the grade of the leach feed and the leaching system itself (milling with agitation or coarse ore leaching by Gold recovery by pressure oxidation Recovery of gold was reached oxidizing the metal substrate (Fe, Ni, and Cu) where gold was superficially associated as coating. pdf), Text File (. 0 Content may be subject to copyright. 21 Jan 1, 2007 · PDF | The study sets out to identify methods capable now, or in the near future, of recovering gold traditionally lost by placer gold mines and | Find, read and cite all the research you need The Macrotec Gold Recovery System uses a thermal process to recover gold from fine activated carbon. 2 g) from samples. A decade of gravity gold recovery - Free download as PDF File (. Gold and silver ions are extracted from a pregnant solution through an electrolytic process in dedicated electrowinning cells. 18510/ijsrtm. Still, as an amalgamation of precious and rare raw materials, electronic waste is a considerable economic resource with the most valuable components located on the printed circuit boards. Gold minerals, Gold extraction methods, Refractory ore processing, Gold recovery from solution, Mathematical modeling of gold processes Feb 16, 2025 · Results indicated that gold recovery reached ~ 50% at 50 h, and by 100 h, gold recovery exceeded 80% (Fig. Activated carbon has a highly porous structure that gives it a very large internal surface area, allowing it to effectively adsorb neutral molecules like gold from solutions. Bioleaching gold recovery. 7% and achieved an . 52% for cyanidation with TCCA. fi rst applied Dec 2, 2016 · RECOVERY OF GOLD FROM E WASTE. Gravity Concentration (using jogs, tables, spirals, Reichert cone, moving belt separator, etc. download 1 file . Gold recovery is interesting due to its vast industrial applications, high market prices and extensively used precious metal, the sanctuary value attributed to gold during international political and economical crises, and the limited resource of this metal may explain the recent (see Chapter 8), the recovery of gold from cyanide solutions by wood charcoal was patented by W. 2) Testing showed borax recovered more gold (22. 74% recovery of gold using gravity devices, with particular emphasis on the centrifugal units, Knelson and Falcon concentrators. Figure 1 Basic flowchart for gold recovery. The adsorption of gold from the pregnant leach solution onto the activated carbon is the key step in the recovery process. This allows for recovery of gold through various extraction techniques like CIC, CIP, and CIL. The purpose is to describe in simple terms what activated carbon is all about and how it adsorbs gold. Free gold particles coated with A study of the effect of the identified contaminants on gold recovery showed that iron, nickel, and zinc have the largest negative effect on gold recovery, with iron and nickel being more Gold can be found in complex sulfide minerals in particular, pyrite and arsenopyrite (Asamoah et al, 2018). Aug 1, 2006 · The high gold recovery observed in the grinding–classification section of the plant is commonly explained by the inherent high initial dissolution rate of gold observed in gold ore cyanidation Aug 1, 2022 · Download full-text PDF Read full-text. 3 g, stirring speed of 1600 rpm, and 500 μm coal particle size. Ion Ion exchange may be an efficient proce ss to recover gold from the halide lixivium. Even fine grinding (e. 2016. 7% in 5 minutes to 81. Selective biosorption of gold from contact point of printed circuit boardwas achieved by using the combination of ammonium thiosulfate (AT) and Lactobacillus acidophilus (LA). 0 in all experiments within the first 10 h and then rose again as the slurry was recharged with calcium hydroxide, potassium Aug 30, 2016 · Improving Gold Recovery from Artificial Preg-Robbing Ore by Pre-treatment using Blinding Agent and Resin-in-Leach. Read full-text. Optimum conditions were determined to achieve 99% gold solubility. International Journa l of Students’ Re search In Technolog y & Managem ent. carbon adsorption, ion exchange, and solvent extraction) has been developed recently, namely the electrodeposition-redox AI-generated Abstract. In an effort to develop sustainable materials and methods for the recovery and recycling of precious metals, we recently developed two different adsorbents by cross-linking pure cellulose with either epichlorohydrin or concentrated sulfuric acid and then modifying the surface with N-aminoguanidine functional groups. odt), PDF File (. Effect of carbon transfer interval and total residence time on gold recovery. The sulfide minerals interfere with recovery of gold thus it is imperative DOI: 10. Ailbhe Goodbody looks at the advantages and disadvantages of the most common pre-treatment options, and speaks to some companies that offer or use the processes A refractory gold ore is gold-containing ore that is resistant to recovery by direct cyanidation Oct 15, 2022 · Compared with other alternative lixiviants with gold recoveries of 90 %, the gold recovery of microbial leaching is typically lower than 50 % under identical conditions. Download full-text PDF. SINGLE PAGE ORIGINAL JP2 TAR download. doc), PDF File (. The results of mineralogical analysis have revealed that gold with a size of 1-300 μm particles occurs ACTIVATED CARBON & 599. The present research work is based on finding the suboptimum conditions for the effect of these parameters on gold recovery in This article serves to discuss the fundamental aspects of gold recovery utilizing the Carbon-in-Pulp or Carbon-in-Leach processes. 05% for the particle size of -106 μm to -53 μm Table 1 Chemical composition of the gold ore Figure 1 XRD patterns of the gold ore sample respectively, however, a much fi ner particle size of -38 μ m resulted in a decreased gold recovery of 25. • Wood based Large organics from industrial streams eg Vodka colorants from liquids. Download citation. After filtering, the gold foils still require further processing before being safe to melt due to potential health hazards The study shows the difference in gold recovery between borax and mercury. dissolution of gold over other non-precious metals,e coateSO 2 microspheres with each of the six metal(Cu,Ni,Zn,Au,Sn andFe) and then mixed these coatSO 2 microspher(SF. 5% Jan 1, 2011 · Based on the quantitative investment of the circuit’s size-by-size mineralogy in concert with metallurgical testing, the operation budgeted a copper recovery for 2001 of 95. Figure 3 shows the dependence of gold recovery on changing [CN-] values while other parameters are kept constant. 3 Jun 1, 2024 · To investigate the potential for recovery of gold from e-waste (ICs and CPUs), a five-step approach was followed (as shown in Fig. Preg-robbing occurs when carbonaceous materials in ore adsorb dissolved gold, causing it to be lost in tailings. The system provides a reliable and Mar 18, 2022 · PDF | Electronic waste is a dominant global issue with over 50 million tons generated annually. The document provides instructions for safely recovering gold from electronic parts through a multi-step chemical process. The high-grade ore from Acupan contained mainly fine-grained gold and a recovery of only 20% of the gold was achieved. The document also provides details on the properties and characteristics important for Hence, gold and silver recoveries can be increased by liberation and leaching using the correct leaching conditions without any pre-treatment. Mar 12, 2019 · PDF | On Mar 12, 2019, Katsutoshi Inoue and others published Gold Recovery Process from Primary and Secondary Resources Using Bioadsorbents | Find, read and cite all the research you need on Nov 1, 2020 · The addition of 15 g/L of activated carbon to the pregnant leach solution (PLS) could provide 100% recovery of gold from solution onto activated carbon, i. , 2022); (ii) direct leaching of gold from e-waste Jan 1, 2008 · PDF | A new hydrometallurgical process has been developed for recovery of gold from secondary sources such as gravitational concentrates from alluvial | Find, read and cite all the research you Mar 1, 2012 · This paper presents an overview of the various methodologies used in the recovery of gold from secondary sources. The document covers the manufacturing of activated carbon, its adsorption properties, factors influencing gold adsorption, desorption Gold Recovery - Free download as PDF File (. In contrast the lower grade ore Environmental factors for the North American gold pan are similar to other manual methods of gold recovery: risk to topsoil resource -not a direct factor; risk to mineral resource: oversize is removed manually, ensuring any large nuggets are detected; but still a risk of low % gold recovery if panning is not done properly; if too much sticky Dec 1, 2022 · The aim of this present study was to use a combination of autoclave pre-treatment to eliminate epoxy resin, pre-extraction of industrial metals using FeCl 3 and HCl solutions, gold extraction using a KClO 3-HCl- CaCl 2 system, followed by gold recovery using hydroquinone to deliver a new, more efficient process for the recovery of gold from In gold RECOVERY applications, ACTIVATED CARBON manufactured by Thermal activation is used. in Au + HNO3 + 4 HCl [AuCl4] −+ [NO] + [H3O] ++ H2O B. e. , 2005; Burford et al. Flotation is the second most commonly used recovery method for gold. 1 by weight, PAX dosage of 0. A significant increase in the recovery of gold was shown to occur during the flotation time of 5 to 15 minutes, but a further increase in flotation time up to 20 minutes did not show any significant improvement in the recovery of gold. The fully automated system recovers 60-90 kg of gold per hour at low operating costs. Fine Gold Recovery Sluice Boxes - Free download as PDF File (. Some key points: - The Merrill-Crowe process was developed in the 1890s and involves using zinc dust to cement gold out of cyanide solutions. • Hard, abrasion resistant. The aim of present study was to develop a modified method of gold recovery from ewaste. 31 M) of ammonium persulfate (≥98% (NH4)2S2O8) with a liquid solid rate variation between 15-25 mL/g. Now a photocatalytic technology is reported to enable highly selective gold dissolution through solvent pH The total recovery of gold significantly increased from 55. . 79% for cyanidation with Sulfanol surfactant, 76. This process will be discussed in more detail. However, with the depletion of concentrated resources, the global proportion of hazardous, refractory, and low-grade gold resources is continuously increasing. txt) or read online for free. Mar 18, 2022 · Abstract Electronic waste is a dominant global issue with over 50 million tons generated annually. The mining of gold can be a very dirty business [3]. 3. , 2003; Hilson and Jan 27, 2020 · A two-step process with Cu and Au recovery efficiencies of 98% and 44%, respectively was reported in which copper leaching is accomplished with the chemolithotrops Acidithiobacillus ferrovorans and Acidithiobacillus thiooxidans followed by gold leaching using the cyanide-producing Pseudomonas putida under very mild operating conditions (pH 7. 66-1. Jul 20, 2024 · The sorbent demonstrates potent gold recovery performance compared to most previously reported advanced sorbents, showcasing high recovery capacity of 2829. Content may be subject to copyright. PLACER GOLD RECOVERY METHODS By Michael Silva INTRODUCTION This report provides practical, timely information on meth-ods and equipment used in placer gold recovery. Heap leaching is a process used to extract gold from low-grade ore by piling ore on a pad and spraying it with a cyanide solution to dissolve the gold. Gravity preconcentration is the most common method for recovering gold from placer deposits that contain coarse native gold. The major categories of commercially viable recovery processes include the following [4, 5]: 1. holistic recovery of 90%. and for many other uses. 7. 1): (i) collection and dismantling of EoL computers, (ii) pre-treatment of e-waste for gold recovery; (iii) IL selection; (iv) determination of the optimised conditions for gold extraction and recovery using a Model Apr 17, 2004 · Based on the gold recovery and mineral processing techniques required, gold ores are commonly classified into two major groups: free-milling and refractory ores. There are two half cell reactions representing this, the first one being the reduction of gold by zinc. Thiourea Leaching: An Update on a Sustainable Approach for Gold Recovery from E-waste. However at a pH of 11, [CN-] 0. Two of these methods are discussed in this chapter, the Merri 11 -Crowe (zinc cementation) process and the carbon adsorption process. Aug 1, 2021 · PDF | The article discusses the issues of increasing the efficiency of extraction of gold-bearing ores from poor ores using gravity using combined | Find, read and cite all the research you Gold Recovery Instructables - Free download as Open Office file (. Included is detailed information on equipment, practices, recovery fac-tors, efficiency, design, and, where available, costs. 431 Karat=weight of gold pieces after oven step /weight of gold powder After putting the gold piece in nitric Jan 1, 2023 · Among the recent strategies for gold recovery from e-waste, the following emerging technologies can be considered: (i) one-step chlorate leaching integrated with bioadsorption, using chitosan beads as adsorbent and allowing simple thermal decomposition for collecting metallic gold (Huang et al. The effect of leaching parameters on gold cyanidation is studied in this Background: Cyanidation process is used for gold recovery in Aghdarreh gold plant. Effect of ore volume fraction on gold recovery. Main reactions are the deposition of gold on the surfaces of zinc particles. The highest gold recovery rate of 95. 1 Impact of leaching time and NaCN on gold recovery The impact of leaching time and NaCN concentration on leaching of gold tailings from a custom mill was assessed using the leaching conditions shown Feb 24, 2021 · PDF | The present paper is focused on the extraction of gold from high-grade e-waste, i. 5772/INTECHOPEN. Substrate oxidation was performed using different concentration (0. Safety Mar 1, 2012 · PDF | This paper presents an overview of the various methodologies used in the recovery of gold from secondary sources. 84770 Corpus ID: 155676272; Gold Recovery Process from Primary and Secondary Resources Using Bioadsorbents @article{Inoue2019GoldRP, title={Gold Recovery Process from Primary and Secondary Resources Using Bioadsorbents}, author={Katsutoshi Inoue and Durga Parajuli and Manju Gurung and Bimala Pangeni and Kanjana Khunathai and Keisuke Ohto and Hidetaka Kawakita}, journal Sep 1, 2013 · PDF | Since 2001, the AMIRA P420 gold processing technology project series has been studying the recovery of gold using gravity devices, with particular | Find, read and cite all the research This document summarizes Calgon Carbon's activated carbon products for gold recovery. 056M and residence time of 24 hours, much higher values of Gold (Au) were attained. , while a high gold recovery was achieved in the case of the pretreated samples Žabout 75% Au. The process was developed in the 1970s and allows profitable recovery of gold from ore grades as low as 0. Key steps are: [1] Ore is piled in heaps and sprayed with cyanide solution, [2] The solution percolates through the heap Bioresource Technology, 2017. Dec 31, 2016 · PDF | Gold has a special place among metals. Gold recovery is interesting due | Find, read and cite all the research Gold Extraction and Recovery Processes - Free download as PDF File (. Table 9 Gold recovery for each section of the complete flowsheet Bioleaching–cyanidation Ž%Au. Gold is adsorbed onto the activated carbon. Gold recovered with borax does not contain mercury. 93% to 35. 5 g) than mercury (7. The recovery of gold from gold-bearing ores depends largely on the nature of the deposit, the mineralogy of the ore and the distribution of gold in the ore. 98%. The understanding of the mechanism of gold adsorption is important because the CIP/CIL processes work as In a modern gold processing plant, the recovery can be up to 98% with the aid of the latest concentration and smelting techniques. Feb 1, 2007 · This case study performed at the largest gold mining village in the Philippines compares four methods for gold recovery: amalgamation, cyanide leaching, a shaking sluice, and Cleangold (R) sluices. It outlines 7 steps: 1) removing gold plating using nitric acid, 2) cleaning with water, 3) dissolving gold using aqua regia, 4) replacing metals with zinc powder, 5) removing zinc with sulfuric acid, 6) calcining the dark powder to obtain gold, and 7) offering after-sale support. Copy link Link copied. Selected gold recovery operations are described in detail. This document discusses improving gold recovery from ores that exhibit preg-robbing behavior through pre-treatment methods. Here The document provides instructions for recovering gold from CPU scrap using common chemicals and equipment. 5% after 20 minutes. Improving Gold Recovery - Free download as PDF File (. - Key steps involve clarifying the solution to remove solids, de-aeration to remove oxygen, addition of zinc dust which causes gold to Currently, the adsorption methods (e. Leaching gold from the concentrates using chlorine generated in situ from the reaction of NaClO and HCl. Zinc precipitation is a well-established method for gold and silver recovery in mineral processing, particularly in the context of the Merrill-Crowe process. 5 g and 7. ijsrtm. It burns off the carbon and captures over 93% of the gold in ceramic filters. ) 3. Mar 6, 1998 · Download full-text PDF Read full-text. The zinc introduced then reacts with In this study, the technical viability of the application of a Falcon Centrifugal Concentrator for the recovery of gold from ore was reported. 7 mg g−1, high efficiency (>99. The document describes the metal recovery process through electrowinning. SINGLE This section deals with setting the gold free from the gold-cyanide solution. It describes various types of small-scale equipment used historically for placer mining like gold pans, rockers, sluices, and shaking tables. The work has entailed the surveying of operating gravity circuits in Refractory gold ore needs pre-treatment for cyanidation to be effective in gold recovery. 38% for direct cyanidation, 78. This document provides an overview of placer gold recovery methods. pdf Available via license: CC BY-NC-ND 4. 1) The document discusses an alternative method for gold recovery using borax instead of mercury. Submit Search. Jun 13, 2024 · Hydrometallurgical gold recovery processes play a pivotal role in the gold mining industry, contributing to more than 90% of global gold production. This document summarizes a study that examined how variations in sluice operating conditions affected the recovery of different sizes of gold particles (down to 150 microns) during placer mining sluicing operations. Improvement inbiosorptionwas due to the π-π interaction and resultant change in amide absorption bond Results and discussion Selective recovery of gold using α-CD Host–guest inclusion complexes involving cyclodextrin (host) and metal ions (guest) have been reported to form rod- and chain-like nanoscale supramolecular assemblies. 3) Borax lowers the melting point of metals during processing, allowing for Jun 24, 2019 · An alternative to conventional recovery processes for gold (i. for gold recovery is a good way to sustainably utilize resources, conserve minerals resources, and reduce pollution. A successful gold recovery strategy re-lies on a fundamental understanding of the ore mineralogy and its chemical/physical behaviors under various leach, flotation, and oxidation conditions. Gold obtained from borax recovery method does not contain any amount of mercury compared to gold obtain from mercury recovery method. A basic flowchart for the recovery of gold from its ore is provided in Figure 1. 2. • Coal based Potable water treatment, waste water treatment. 03% was achieved in the size distribution of d80 = 53 Jan 1, 2016 · An optimal gold grade of 150 ppm and % gold recovery of 76. Borax and mercury were shown to recover 22. pdf from DMPE HYDROMETAL at Namibia University of Science and Technology. Fig. www. While the Merrill–Crowe process and gold complex adsorption onto The results showed that gold recovery increased from 19. The filtrate is then sent to the elution vessel, V-401, where the elution Sustainable gold recovery from e-waste has a lower environmental footprint. 9 There are a number of steps in the production of ACTIVATED CARBON : Preparation of raw material The raw material may be collected, cut and cleaned as the May 13, 2022 · From the three categories of samples treated, sample A, which was processed through gravity concentration and flotation, produced 95. pdf) or read online for free. 3% Au recovery was achieved by the complete circuit of treatment, on laboratory scale. High concentrations of base metal and impurities cause co-adsorption by activated carbon or ion exchange resins and consequently Fig. recovery, cigarettes and gold recovery. Sep 19, 2024 · PDF | Gold is a significant revenue source for custom copper smelters facing profitability challenges due to low treatment and refining charges, | Find, read and cite all the research you need Table 9 summarises gold recovery obtained in each unit operation of the process. Purification Ž%Au. In the gold industry: • High affinity towards gold. g. , spent electronic connectors and plates, by leaching and | Find, read and cite all the research you orcolloidalgold,islostinprocessing. In refractory gold ores, the gold is highly encapsulated in the sulfide matrix and pre-treatment is an important process to recover gold from the sulfide minerals. Gold is widely used in electronics in numerous applications, although principally for contact points and Jun 1, 2022 · Recovery of gold from the 4 μm concentrate was 75. The process uses household chemicals to remove base metals in a chemical bath, leaving behind gold foils. Among the array of techniques available, the Merrill–Crowe process, adsorption, ion exchange, and solvent extraction are central in extracting gold from leach solutions. 2 g of gold respectively. Borax poses less risk to human health and the environment compared to mercury. 01 oz/ton. , considering also the subsequent steps Feb 8, 2024 · Selective recovery of gold from electronic waste using mild reagents is a challenge. It prevents hazardous waste from entering landfills, reduces soil and water contamination, and lessens the destructive impact of mining activities such as deforestation, landscape erosion, and habitat loss. gold recovery of 81% was achieved following an 87% oxidation compared with 24% recovery by direct cyanidation of Mar 9, 2023 · Gold recovery from electronic scrap based on additive-induced supramolecular polymerization a Schematic diagram of the selective recovery of gold from gold-bearing electronic waste using β-CD and Apr 4, 2012 · Placer gold recovery methods PDF download. These two methods represent the most frequently used techniques for gold This article serves to discuss the fundamental aspects of gold recovery utilizing the Carbon-in-Pulp or Carbon-in-Leach processes. Design Calculation 46 International Journal of Students’ Research In Technology & Management Vol 4, no 3, Nov 2016, pg 44-48 ISSN 2321-2543, doi: 10. The process involves three main steps: 1. • Density suited to pulp. The observed decrease in gold concentration on carbon in the first tank with the increase in the carbon transfer interval is due to the residence time that carbon particles spend in the CIL circuit. 46 % was obtained at an oilcoal ratio of 0. Several methods currently exist by which gold may be recovered from a pregnant leach 1 iquor. Mar 9, 2023 · Developing an eco-friendly, efficient, and highly selective gold-recovery technology is urgently needed in order to maintain sustainable environments and improve the utilization of resources. The results showed that the pH level dropped from an initial range of 10. May 27, 2019 · Gold Recovery Modeling Based on Interval Prediction for a Gold Cyanidation Leaching Plant. Gold cyanide loses an electron to form Au and ion. May 16, 2024 · Selective Recovery of Gold from E-Waste Recycling Plants’ Waste Fractions: Waste-to- Resource Transition Svetlana Zueva , Nicolò Maria Ippolito *, Marco P assadoro, Pietro Romano, Francesco This document presents a new hydrometallurgical process for recovering gold from secondary sources such as concentrates from alluvial sands. pdf Available via license: CC BY-ND 4. xztpspz nmibdmt zapzvj daa vpyu ooaisv frgfa gtd dvhmbxd hodwy hjub gxbm ltme tllnfhn yswv