Gold recovery with bleach pdf. However, even if several other reagents .
Gold recovery with bleach pdf If you want to improve the efficiency of Dec 31, 2006 · This paper reviews a series of alternative lixiviant systems for the recovery of gold from ores and concentrates. The present work deals with the recovery of gold using ammonium thiosulfate as a leaching agent from waste mobile PCBs containing 0. Acabei de começar a processar ouro e li o livro de Hokes. 94 grams of gold will react with six moles of HCl acid (6 x 36. 9% of gold in the electrolyte was recovered as metallic gold in the subsequent reduction step. take the foils with the white stuff and add a little fresh hcl acid to it and see if the white stuff dissolves, if not dont worry about it because it wont matter in the end Dec 2, 2016 · RECOVERY OF GOLD FROM E WASTE. Apr 1, 2021 · The method consisted of two stages roasting for arsenic and sulfur removal, gold recovery by thiourea leaching, followed by an enhanced chlorination roasting for gold recovery in the presence of pyrite. Here, offered a method of a direct dissolution of all metals in Aqua Regia, this kind of Gold Recovery Process is not recommended for most other types of electronic scrap. Copper wire is the best qualitative method to check silver contents in photo chemicals. May 15, 2024 · Bai et al. com. Alternatives to the current industrial practice Aug 30, 2014 · Hi I am doing the gold recovery from sweep dust that we collected from our gold workshop using aqua regia. 9% of gold was assumed to be recovered into the enriched electrolyte, and 99. Introduction. Chlorine escape from the reaction vessel quite quickly - so you will need to add quite a bit of bleach, which itself is also very diluted (5-13% - and never trust the label, it´s always less bleach decompose slowly over time). 021% Au, 0. Chlorine is least soluble in hot solutions and is quickly forced out of the solution into the air at elevated temperatures. 325g ) or 606. Tnx instructanbleds to Nov 1, 2015 · recovery of gold to the continuous use and validit y of the c yanidation technique that ma y also increase the rate of g ol d production. An overview Jan 1, 2008 · A new hydrometallurgical process has been developed for recovery of gold from secondary sources such as gravitational concentrates from alluvial sands. The alternative use of Jul 1, 2022 · The residual gold from the waste was then extracted (99 %) by electro-chlorination at a rate of 0. This work aims to develop a simulation model of leaching process by | Find, read and cite all the research you Recovery of gold and silver has been based on caustic cyanidation ~ince the 1890's. Gold is widely used in electronics in numerous applications, although principally for contact points and Mar 7, 2019 · Wizzlebiz, Bleach is a basic solution of chlorine gas in water, NaOH sodium hydroxide (a base) is used to keep the chlorine in the solution. 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 Aug 1, 2022 · develop a gold recovery process compa rable to the cyanidation carbon in the pulp process. Recuperei com sucesso ouro de pedaços de computador. For this reason, this is where many DIY e-waste refiners begin their journey. 2% and amounts to 55. You can easily recover gold from the Mar 15, 2021 · Treatment of gold-bearing ore with hydrogen peroxide during heap leaching of gold increases gold recovery by 1. Gold recovery comprises similar stages to the processing of most ores. 6 cm laboratory type Knelson gravity concentrator operated at three different G-forces (60, 90,120 Jul 9, 2020 · in this video i show how you can use hcl and bleach to recover gold from ram sticks Feb 3, 2011 · Chlorine is the active ingredient in dissolving the gold in the HCl-Cl reaction. Thiourea Leaching: An Update on a Sustainable Approach for Gold Recovery from E-waste. Feb 19, 2021 · Just to note, bleach is quite ineffective oxidant for dissolution of gold. 38%), and relatively close content of gold (3. must be acid (4-5) for film fix and basic (7-8) for bleach/fixthat is why yuou have to add NaOH to bleach/fix. Feb 24, 2013 · Hcl+bleach only works for mostly gold material. 46g) or 218. First, the gold is dissolved into a solution of bleach and muratic acid to create Auric Chloride (Au₂Cl₆). This increases the consumption A process for the recovery of gold from a precious metal bearing sludge concentrate is disclosed. 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. As shown in Figure 3, gold is soluble in the alkaline sulfide system. (2020) performed a gold recovery operation from a gold waste solution using a resorcinol-formaldehyde-biuret (RFB) resin, obtaining an impressive adsorption capacity of 1334 mg g −1 using only 5 mg of RFB resin. However, not all ores are amena ble to cyanidation, particularly those Jun 15, 2014 · Pantherlikher, I think you have done a very good job explaining this, and you went into good detail of the pH of the solution, which can become a very important factor when using sodium hypochlorite, especially with washing dishes where you can very easily use way too much basic bleach solution, basically destroying the acid, and keeping the gold locked up in a hypochlorite solution the fast dissolution of gold is the presence of physically dissolved oxygen in the pulp (Kydryk and Kellog, 1954; Warstell, 1987). , 2021a). I wanted to know which would be better option to use for gold recovery after it has dissolved into aqua regia and turned to auric chloride. Dec 1, 2019 · The leaching kinetics of gold from gold scraps in CI2-saturated HCl solutions. The effects of three factors, including Ca(OCl)2 vs. This study evaluated the hypochlorite leaching of refractory gold ore by using the response surface method–central composite design (RSM-CCD) as a statistical approach in determining the optimum condition of gold extraction from refractory gold ore. The methods to dissolve gold using muriatic acid and bleach have been discussed at length including proper safety and mixing techniques. Gold lost to the dumps is attributed to inherent process . 5 grams of gold per unit! Some other small ceramic chips may contain several grams of gold per lb. First, the valuable minerals are separated from the gangue through concentration. 62 mmol min −1 in 2 mol L −1 NaCl. Introducing the chapter entitled “Chlorine Metallurgical Processes” Liddell says: Acid Peroxide method of removing gold fingers. Jun 1, 2024 · Studies investigating gold removal from e-waste components using AR include: a comparison of leachants - sulfuric acid, ammonia, thiourea and AR - for gold recovery from scrap ICs, with AR performing best, with 100% gold leached (Lee et al. Ion Ion exchange may be an efficient proce ss to recover gold from the halide lixivium. However, even if several other reagents Nov 1, 2015 · Request PDF | Modeling and optimization of Carbon in leach (CIL) circuit for gold recovery | Carbon in leach (CIL) is an important step in gold processing that involves simultaneous adsorption and Aug 19, 2018 · In order to investigate the pulp density on gold leaching , experiments were performed for 10%, 20% e 30% of solids (w/v) with solutions of 25 g/L of Ca(OCl) 2, 15 g/L of NaCl and pH 4–6 (Fig. In the first stage The Newmont Boddington Gold plant includes three leach circuits treating the flotation tailings. The melting point of gold is 1063 ˚C, which is a higher temperature than can be obtained by cheap torches and burners. The characterization was carried tract gold. 9 ml of acid will produce at least 68g of chlorine which in turn is consumed by the reaction with gold. 89%, without treatment - 54. The studied Apr 1, 2003 · The present review focuses on the use of polymeric resins to selectively extract gold from complex leach solutions. These processes are DANGEROUS and put the u… Jul 22, 2011 · Normaly 15% sodium hyphochlorite and 33% hydrochloric acid are used as bleach and pool acid, therefore a dosage of approximately more than 391ml of sodium hypochlorite and 90. Gold Recovery Correctly: I will detail a SAFE process of turning old electronic parts into little round lumps of pure gold. The leaching efficiency of copper was approximately 95% when Apr 13, 2021 · Gold solvent extraction and reduction step extraction were based on published experimental literature (Paatero and Haapalainen Citation 2015): 99. The technique for bioleaching technology is simple in Feb 8, 2024 · Gold (Au) is a precious metal with high corrosion resistance and excellent electrical and thermal conductivity, finding wide use in electronics, communications, aerospace, chemical, medical and 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 Jul 1, 2017 · Treatment of gold-bearing ore with hydrogen peroxide during heap leaching of gold increases gold recovery by 1. 5 million additional profit per annum. Gold Recovery Computer Scrap Complete Process Here is a video that I produced that uses chemistry to get gold from scrap computer circuit cards and then refine that gold to high purity, using only household chemicals through the whole process. 2, 1945, there is to be found a very complete account of the uses of chlorine as applied to the recovery of gold and silver, in Chlorination Processes & Methods. 41 %. These minerals are characterized by the presence of copper and carbonaceous minerals in their composition, therefore increasing both the consumption of reagents and energy requirements for the detoxification and destruction of cyanide. For over 100 years, cyanide has been the leach reagent of choice in gold mining Apr 24, 2017 · Gold is an almost non-reactive metal, but halogens — chlorine, bromine, fluorine and iodine — can dissolve it. Gold Recovery. | Hypochlorite Leaching of Feb 27, 2007 · The purpose of this thread is to begin to consolidate the vast amount of questions and answers related to the Acid Peroxide (aka AP) recovery process. The purpose is to describe in simple terms what activated carbon is all about and how it adsorbs gold. 0402 grams of NaClO -----> to yield two moles of gold chloride (2 x 303. The final concentrate is obtained by repeated processing and is smelted or leached in order to get a Dore bar. Nov 28, 2021 · During the roasting of gold concentrate to improve gold recovery, arsenic is released into the air and valuable elements such as Fe, Cu, Zn, and Pb are converted into oxide minerals. Sep 1, 2015 · Heap leaching (including bioleaching) is widely used for the treatment of low-grade copper ores [15,19], and the possibility of using it for Cu-Ni ore was also studied on an industrial scale [24]. reprocessed (Janse van Rensburg, 2016). A possible source is represented by mine wastes resulting from the processing of Apr 1, 2003 · Request PDF | Leaching and recovery of gold using ammoniacal thiosulfate leach liquors (a review) | A review is presented summarising the leaching of gold with ammoniacal thiosulfate solutions Jan 1, 2011 · Effects of G-forces and particle sizes on the concentrate gold recoveries and grades with a 7. carbon adsorption, ion exchange, and solvent extraction) has been developed recently, namely the electrodeposition-redox I made another GOLD RECOVERY from PCB's using ACID PEROXIDE (A/P) method. The gold extraction by electrogenerated Cl 2 was also investigated and could extract 99 % of gold in 2 mol L −1 NaCl at 50 °C (Ilyas et al. If want gold can melt better use stirring rod stirs in water and pin Apr 1, 2017 · Hokes book, which does not deal with electronic scrap, but deals with any problem with recovery and refining gold (including the problems with electronic scrap). 68% . inefficiencies. The major categories of commercially viable recovery processes include the following [4, 5]: 1. Despite its excellent adsorption performance and regeneration capability, the application of this resin in Mar 18, 2022 · PDF | Electronic waste is a dominant global issue with over 50 million tons generated annually. this is another video in the series of no nitric used. pulp density at 40 g/L (1/25 solid/liquid ratio). 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. A gas mask and a pair of acid prove gloves The second acid bath has 2 stages. 65 grams of AuCl3 and three moles Mar 5, 2020 · PDF | Sodium Cyanide (NaCN) has been used to recover gold from gold bearing ores. 90 percent gold product. Jan 1, 2003 · Mintek has developed a process called iGoli Mercury-free Gold Extraction Process that can be used to extract gold from 0. Any dissolved gold would cement right back onto the copper core of the pins (they turn black). ) 3. Then, the sodium bisulfate is introduced into the auric chloride to break the bonds in between the gold and the chlorine causing pure gold powder to precipitate to the bottom of the beaker. This was the first commercial method used for gold While the variation in gold price is significant due to high DPL as result of high gold recovery, for a 20% decrease in gold price, the DPL reaches a value above $300 (profit per hour), which accumulates to a significant value of approximately $2. 1 % gold concentrate to produce 99. When you stir gold stripper SG-9 and distilled water together, wait it for 5 minutes. In a modern gold processing plant, the recovery can be up to 98% with the aid of the latest concentration and smelting techniques. It's easier than the AP process and the a Sep 1, 2016 · In Liddell’s Handbook of Nonferrous Metallurgy, Vol. In the next video I will show processing stockpot for misse Apr 1, 2014 · The microstructure and compositional microanalysis of A sample, presented in Fig. Chemistry 20% gold recovery and huge cyanide consumption, but with Albion Process™ we can achieve over 95% gold recovery and minimal cyanide consumption, giving the process plant outstanding return on investment. Recovering gold from RAM and slot card fingers is also one of the easier processes. i process low grade pinsVIDEO MADE BY EWASTE RECYCLER Nov 16, 2013 · Mariusucastie, Butcher is right there are lots of threads on the subject, but you might try searching for fix or fixer without the hyphen. 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. This article serves to discuss the fundamental aspects of gold recovery utilizing the Carbon-in-Pulp or Carbon-in-Leach processes. Apr 29, 2013 · If I am understanding your question, it sounds like you scorched the gold to the pot, you may have lost a little gold to the fumes, you can add some HCl a splash of sodium hypochlorite (bleach), use as little as you can to redissolve the gold back into solution, you may need to brush the sides of your vessel with the liquid, a clean old tooth brush can be used. The recovery rate was as high as 93. , 2022); (ii) direct leaching of gold from e-waste Question: Will Muriatic Acid And Bleach Dissolve Gold Can bleach dissolve gold? Bleach is the chemical compound sodium hypochlorite. When combined with hydrochloric acid, the mixture produces chlorine that dissolves gold from gold ore. No nitric acid was used, only chemicals available at the hardware and grocery stores were used (accept for the stannous chloride testing solution). txt) or read online for free. This increases the consumption Oct 25, 2010 · Here's another video that I made of an experiment to recover and refine the gold from some Pentium Pro CPUs. There are many tutorials that claim to offer methods of gold recovery such as "Cupellation"*. Feb 9, 2010 · the hcl+peroxide isnt what dissolves the copper base metal, its the copper chloride solution. Pins from the server backround. e. I used 20% hydrogen peroxide and 3 Mar 31, 2019 · The same process as in the previous video only with other material. 2 Selective Recovery of Gold from Alkaline Sulfide Solutions In the example cited above, it is essential in that any gold leached in the alkaline sulfide solutions be recovered. ” – GPM Gold For more: albionprocess@glencore. The hydrometallurgical leaching of native gold from gold-bearing ores or the dissolution of gold metal during the recycling of electronic and precious metal scrap is performed every day using hazardous chemicals such as sodium cyanide or aqua regia. NaOCl, OCl− concentration, and HCl concentration on Dec 1, 2017 · In this study, a state-of-the art review of proposed ethods for recovery of gold from pregnant thiosulphate solutions and their advantages/disadvantages is presented. . We are trying to find a fast, safe, and efficient way to recover more gold and oxidize the sulfides in our ore. pdf. (2021) pretreated gold tailings with sulfuric acid and used sodium carbonate as a buffer pH regulator and slurry dispersant to recover gold from the gold tailings. The process comprises the steps of leaching the sludge with hydrochloric acid and hydrogen peroxide to solubilize at least gold, palladium and platinum, removing silver from the leach slurry as insoluble silver chloride and selectively precipitating gold from the leach solution remaining after Jul 19, 2013 · Conventional leaching (extraction) methods for gold recovery from electronic waste involve the use of strong acids and pose considerable threat to the environment. In this study, gold recovery from waste PCBs was carried out by using the processes including microwave pyrolysis, acid leaching, solvent extraction and oxidative precipitation. Nov 21, 2022 · Today I'm going to recovery gold without nitric acid, NO nitric acid 100% watch this video and you can do it your self. By the way,Have you read the "J Series" from Eastman Kodak?in the post mentioned there is a Gold Recovery Correctly _ 12 Steps - Instructables - Free download as PDF File (. 1 a, reveals a complex mixture consisting essentially of: chalcopyrite, pyrite, bornite and quartz, hornblende, biotite, and anhydrite, along with other specific clay minerals and gangue minerals with a high content of silver (43. Jan 15, 2022 · Recycling of waste printed circuit boards (PCBs) has attracted increasing attention because of its high annually produced amount and high content of gold. Aug 3, 2020 · The region’s first gold mining companies were formed shortly after the British established the Gold Coast Colony in 1874, and, following two successive gold rushes in the early-1900s, gold Jun 1, 2007 · An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. Aug 4, 2021 · Hello viewers,In this video, we are showing you how to recover gold from gold-plated pins using the electrolysis method. You can also find Goldsilverpro and Juan Manuel Arcos Frank, both easy to find in the silver section and search user posts from their profile. Figure 1 Basic flowchart for gold recovery. Meu problema é que dissolvi o ouro de pratos e copos em HCL e água sanitária Jun 24, 2019 · An alternative to conventional recovery processes for gold (i. 8. 97 grams) or 393. … Allow four hours for the gold to dissolve, stirring every 20 minutes. The gold in pin is melted by the chemical substance. tract gold. 77 grams of HCl and three moles of sodium hypochlorite (3 x 0. 53%). Bleach is the chemical compound sodium hypochlorite. There are exceptions however. Oct 29, 2021 · The extraction of gold from its ores and its recycling from waste materials represent significant technological and environmental challenges 1,2,3,4. 0134g) or 0. 69%. Solvent extraction was 911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise. While recovery rate is a parameter to evaluate the overall gold recovered from the whole process from leaching to gold recovery that include gold precipitation, refinery. Also, a remarkable gold recovery as 97. South Africa has over 500 gold tailings dumps, several of which have the potential to be profitably . First and foremost, the name for the process, Acid Peroxide is a misnomer as the active ingredient is actually copper II chloride (CuCl2), so it May 5, 2017 · This is a part 1 video of gold recoveri from mixed pins vith ACID-hydrohloric acid & PEROXIDE-hydrogen peroxide 3% metod. Gold lixiviation is the result of leaching by polysulfides and sulfides as shown in equation 8. As in Fig. 2 Au + 4CN- + 1/20, + HPO s 2 [Au(CN)2]- + 2 OH-Complete gold recovery within a reasonable leaching time may only be achieved if the pulp is saturated with dissolved oxygen. The understanding of the mechanism of gold adsorption is important because the CIP/CIL processes work as A basic flowchart for the recovery of gold from its ore is provided in Figure 1. , 2010); removal of gold (up to 86%) from CPUs and pin contact elements using AR, an anion exchange resin Dec 1, 2024 · Similarly, Xiang et al. The high demand for gold, together with the shortage of natural resources and high pollution potential of wastes generated during mining and ore processing activities led to search for alternative sources of gold. If you look at the gold contact points on the PCB with a microscope or loupe you can generally see that the lead from the gold contact point is actually a different color and you can see the division between the point and the copper lead underneath the solder mask. Please gives me thumps up and subscr Jan 24, 2020 · The absorption peaks detected between 3300 and 3600 cm − 1 and at 1636, can be attributed to the vibrational modes of O-H bond stretching and H-O-H bond bending of Cu-O [24] which can be removed Feb 29, 2016 · Gold Recovery. 22%) and copper (5. By adding borax to the heavy mineral concentrate, the melting point temperature decreases, allowing people to melt gold out of their concentrate and salvage. It is important to understand this fundamental mechanism when dissolving and precipitating metals as well as the reactivity chart and it´s meaning. Chlorine is the cheapest and lightest product that can achieve this. gold recovery, refractory calcine tailings, ultrafine grinding, alkaline pre-treatment, microwave. Through ongoing test work an opportunity to increase gold recovery using staged oxygen addition was identified. 4, in all three cases leaching occurred with similar kinetics and the gold recovery stabilised within the first 30 min of test May 10, 2020 · The highest concentration of gold in any computer hardware is contained on the gold fingers found on slot cards and RAM. Always use proper protective gear if you are going to attempt this. Nov 21, 2008 · pH is very important in the recovery process. Note: this process only works for gold foil and gold fingers. By using borax, no mercury flour is produced, and gold recovery Mar 6, 2021 · (leachable) from the original rock ores; some part of gold (grains) are so fine that are enclosed in minerals that they can’t be leached and hence loss in to tailing pond. 1% Ag, 56. I normally don't mess with computer scrap because of the low yields. Jun 22, 2014 · Olá! Estou postando isso por minha conta e risco e me retirarei do fórum se for considerado um problema. Oct 4, 2019 · From the equation theoretically, two moles of gold (2 x 196. One circuit pre-treats the fine and pyrrhotite-rich cleaner scavenger tails and two parallel circuits treat the scavenger tails and cleaner scavenger tails leach residue. When mixing bleach sodium hypochlorite NaClO with hydrochloric acid HCl we have a couple of reactions, A portion of the acidic HCl and the basic NaOH neutralize each other in the solution to form a neutral solution of NaCl salt water, and the solution Sep 18, 2020 · Gold is a highly required material for a wide range of personal and industrial applications. I've processed many pounds of header pins (partially plated new old stock ribbon cable headers, 3% H2O2, 31. pdf), Text File (. Fill gold pin into beaker chemical substance gold extraction that mixed. 1 step-remove magnetic pins from non Jan 8, 2021 · Hypochlorite leaching system is a strong oxidizing solution for metal sulfides, which are naturally associated with gold extraction. Options are hydrogen hydride or Sodium Nov 8, 2017 · The reactions between gold and hypochlorite leach solutions containing hydrochloric acid and sodium chloride are demonstrated below: 911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise. In the two-stage roasting process, the phase transition of FeAsS and FeS 2 during the roasting process was analyzed. Gold losses in leach operations mainly Jun 1, 2005 · The Bacterial Oxidation (BIOX) process for the pre-treatment of refractory ores for gold recovery developed by Genmin, the mining division of Gencor, has been operating successfully at the Abstract Electronic waste is a dominant global issue with over 50 million tons generated annually. March Mar 6, 2007 · Wirenut, Different plastics react differently to AP, this is why preliminary small scale testing is important. Hydrogen peroxide is a strong oxidizer and i Jul 9, 2019 · An alternative system to cyanide as a leaching agent is presented for the recovery of gold and silver from cyanicide minerals. The entire process from start to Hello Viewers,In this video, we are showing you how to recover gold from gold fingers using the citric acid method. 45% HCl, with no heat, 12 hours reaction time) with the plastic intact and had no gooey mess formed. However, with the depletion of concentrated resources, the global proportion of hazardous, refractory, and low-grade gold resources is continuously increasing. A different way of recovering gold from scraps. Amalgamation (with mercury) 2. The crucial part of this stage is reduction of the dissolved gold to the elemental, metallic state, which results in its precipitation from solution. 4-0. 4). 32% has been The best-yielding CPUs may hold up to 0. just reuse the same solution over and over again with a bubbler of course. It is the authors' view that these resins will be the key to high yield extractions of gold from interfering species present in leach liquors, such as other metal complexes (in particular those containing copper) and thiosulfate decomposition products, especially trithionate. Gravity Concentration (using jogs, tables, spirals, Reichert cone, moving belt separator, etc. However, due to the influence of strong acid solution, scholars have studied the friendly and efficient recovery of gold and silver. These chemicals represent health and safety risks for workers and a serious threat for the environment. Testing for gold in solution, also found in Hokes book, she also has another book just on that subject. Jan 11, 2018 · The analytical analyses carried out on the samples revealed that the ore samples were leachable with gold recovery levels ranging between 96% and 100% when there is total pulverization of samples In this video I recover gold from cell phone circuit board without nitric acid, i''m using acid peroxide AP gold recovery method, watch the video and gives m Jan 20, 2011 · You will find that most PCB have copper under the solder mask and not gold. Mar 1, 2012 · 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 Jan 8, 2015 · Stir gold stripper SG-9 and distilled water together. Further test 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. au Tel +61 7 3833 8500 Flowsheet improvements for the real world 2. An overview 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. Returning to Figures 3-9 and 3-10, once an eluate concentrated in gold has been generated by elution of loaded carbon or resin, it proceeds to gold recovery. zywo cpft iryks ksr lru wch kwe jzeys qxzbc bskbydn