Microbemediated sustainable biorecovery of gold from
Innovative sensitive biogeochemical detection methods and biosensors for goldspecific exploration will revolutionise the gold exploration by applying the basics of these bacterialmetal interactions, thereby making the realtime gold processing
Bacteria Found to Thrive on Gold Scientific American
Bacteria Found to Thrive on Gold A newly discovered biochemical technique could aid in the recovery of the precious metal from mine waste By Ewen
Gold particle geomicrobiology: Using viable bacteria as
The aims of this study are to evaluate the functional capabilities of bacterial communities on gold particles from six key locations using GeoChip 50 and to link functional and taxonomic data
Gold Dissolution from Ore with IodideOxidising Bacteria
Gold leaching from ore using iodideiodine mixtures is an alternative to gold cyanidation This study evaluated the ability of iodide
Polymers Free FullText Selective and Effective Gold
Several researchers reported the adsorption and reduction of Au (III) ions by amino acid [ 11, 26, 27 ] However, very little investigation has been reported for Au recovery from a practical leaching solution of
Metal resistant bacteria on gold particles: Implications of
This study will i) characterise and assess gold particle morphology and surface textures, ii) correlate the particle morphology with bulk sediment geochemistry
Vanadium removal from LD converter slag using bacteria
Bioleaching Bacteria Fungi Adaptation 1 Introduction Due to reinforcement of environmental regulations that requires minimization of waste disposal,
Characterization of Slags Produced During Gold Melting
open access In the extractive metallurgy of gold ores the cyanidation and melting processes are generally applied These processes allow obtaining the “dore”
Recovery of metal from slag/mixed metal generated in
The studies showed that in the case of the charge chrome plant, crushing of mixed metal and slag to below 10 mm followed by jigging of the −10+1 mm material and
Environmental and Socioeconomic Impact of
Copper slag is generated when copper and nickel ores are recovered from their parent ores using a pyrometallurgical process, and these ores usually contain other elements which include iron, cobalt,
Progress, Challenges, and Perspectives of Bioleaching for Recovering
Using an initial bacterial oxidation “Effects of pH, pulp density and particle size on solubilization of metals from a Pb/Zn smelting slag using indigenous moderate thermophilic bacteria,” Hydrometallurgy, vol 104 “Bioleaching of gold pyrite tailings with adapted bacteria,” Hydrometallurgy, vol 22, no 3
Metallurgical recovery of metals from electronic waste: A review
Pyrometallurgical processing has been a traditional technology for recovery of precious metals from waste electronic equipment However, stateoftheart smelters are highly depended on investments Recent research on recovery of energy from PC waste gives an example for using plastics in this waste stream
Transfer of Gold, Platinum and NonFerrous Metals from Matte to Slag
One of the stages of extracting gold and platinum from sulfide materials and circulating slags is the melting stage in orethermal and electric furnaces, where the melt is separated into matte and slag Gold, platinum, and nonferrous metals are concentrated in the matte However, a significant portion of them ends up in the slag, which reduces
Vanadium removal from LD converter slag using bacteria and fungi
Vanadium removal is at the lowest level in comparison to the two bacteria system However, after a prolonged adaptation, fungi also grow at slag concentration of 50 g L −1 It is shown in Fig 8 a and b that in the adapted system, more than 70% of vanadium is removed at slag concentration less than 10 g L −1
Vanadium removal from LD converter slag using bacteria and fungi
Removal of vanadium from LinzDonawits (LD) converter slag was investigated by means of three different species of microbial systems: Acidithiobacillus thiooxidans (autotrophic bacteria), Pseudomonas putida (heterotrophic bacteria) and Aspergillus niger (fungi) The bioleaching process was carried out in both onestep and
Minerals Free FullText Recovery of Iron from Copper Slag Using
The Fe3O4 and Fe2SiO4 in copper slag were successfully reduced to metallic iron by coalbased direct reduction Under the best reduction conditions of 1300 °C reduction temperature, 30 min reduction time, 35 wt% coal dosage, and 20 wt% CaO dosage (075 binary basicity), the Fe grade of obtained iron concentration achieved
Recent Progress in Electric Furnace Titanium Slag Processing and
Titanium slags produced through ilmenite electric furnace smelting contain 60–80%TiO2, a vital titanium resource in the titanium industry The processing and utilization of titanium slag is faced with many challenges, such as complex mineral structures, high requirements, severe environmental pollution, and heavy additives and energy
Selective Dissolution of Magnesium from Ferronickel Slag by
Slag is a metallurgical waste generated from smelting processes to produce metal from its raw materials or scrap For ferronickel production from lateritic nickel ore, the amount of ferronickel slag accounts for more than 90% of total furnace output because of the low metal content in the feed This large ratio eventually promotes
Selective Dissolution of Magnesium from Ferronickel Slag by
The effect of biooxidation (BIOX) pretreatment of refractory gold concentrates using mixotrophic and chemolithotrophic bacteria on the gold extraction during cyanidation of the concentrates at
Recovery of copper from copper slag using a microbial fuel cell
A dualchamber microbial fuel cell (DMFC) for the treatment of copper slag sulfuric acid leach liquor was constructed The electrogenesis performance of the DMFC and its ability to extract copper from the copper slag leachate were investigated The results demonstrated that the maximum voltage was 540 mV when the DMFC achieved steady
Removal of phosphorus from LD slag using Heterotrophic bacteria
Abstract LinzDonawitz (LD) slag is a byproduct of the steelmaking industry and contains ~30% Ca, 20% Fe, 5% Mg and 14% P For its application as flux in steelmaking, the phosphorus content has
Ammoniacal System Mechanisms for Leaching Copper from Converter Slag
In pyrometallurgical processes refining copper, the main source of loss in the conversion stage is from slag This paper reports on research work treating converter slag containing high percentages of copper (36 wt%) using ammonium hydroxide at room temperature Variables analyzed are solution pH, agitation, temperature, NH4OH
Recovery of critical metals using biometallurgy ScienceDirect
Although researchers so far have mainly focused on PGM recovery from synthetic wastewaters using whole cells or products of microorganisms [15, 27], a few studies have used real wastewaterTwo studies reported the Pd recovery from metal refining [28] and catalytic converter production [29] waste streams by reductive precipitation on
Sustainability Free FullText Sustainable Utilization of Steel Slag
Steel slag is a large amount of residual material produced in the process of steel manufacturing With the requirements of sustainable development in China, the utilization of steel slag has become a hot issue Through an indepth study on steel slag, it is apparent that it has been widely used in various fields in recent years The resource
gold from slag using bacteria
Review on Cyanogenic Bacteria for Gold Recovery from E Refining Slag Treatment with Flotation Cell p330 Environmental Impacts of Lead Ore Mining and Smelting p338 Exploratory Study of Gold Recycle from the Tailing of AllS Cyanidation CIP p348 Review on Cyanogenic Bacteria for Gold Recovery from EWaste p355
A clean way to extract rare earth metals Harvard John A
As part of their research at SEAS, from 2009 to 2015, David Clarke, the Extended Tarr Family Professor of Materials, and his then graduate student, William Bonificio, have developed a method to separate rare earths using bacteria filters and solutions with pH no lower than hydrochloric acid The method was recently described in
Reclamation of Phosphorus from LD Slag UsingMicroorganisms
slag using a facultative anaerobe Ac idithiobacillusferroxidans The reductive bioleaching in a pure CO 2 atmosphere results in 83% removal of c hromium in comparison to 27% chromium
Recovery of Gold from the Refractory Gold Concentrate Using Microwave
Microwave technology has been confirmed to be suitable for use in a wide range of mineral leaching processes Compared to conventional leaching, microwaveassisted leaching has significant advantages It is a proven process, because of its short processing time and reduced energy The purpose of this study was to enhance the gold
Heavy Metal Removal Processes by SulfateReducing Bacteria
The contamination for heavy metals is caused by natural phenomena and human activities The human activities demand the development of new chemicals, materials and enormous quantities of energy and exploit natural resources and discharge of wastewater from metalrelated industry, which result in environmental pollution, mainly of