Bio-Assisted Leaching of Copper, Nickel and Cobalt from Copper Converter Slag. Bioleaching of the converter slag was studied on bench scale using Thiobacillus ferrooxidans, an iron oxidising bacteria, for recovery of valuable metals at room temperature. Parameters such as particle size, pH, pulp density, Fe (II)/Fe (III) ratio and amount of Fe ...
Key words: Bioleaching, Penicillium notatum, organic wastes, organic acids, metals solubilization. INTRODUCTION Bioleaching is a process based on the ability of micro- processes are usually more eco-friendly and economical organism (bacteria and fungi) to transform solid com- than physico-chemical processes.
Bioleaching of copper and zinc from the ore body during 10 days of processing using indigenous iron-oxidizing bacterial consortia under optimized conditions are studied. Copper and zinc extraction rates both in bacterial and control systems in shaking conditions were higher (Fig. 3 …
@article{Potysz2016ComparisonOC, title={Comparison of Cu, Zn and Fe bioleaching from Cu-metallurgical slags in the presence of Pseudomonas fluorescens and Acidithiobacillus thiooxidans}, author={Anna Potysz and Piet N. L. Lens and Jack van de Vossenberg and Eldon R. Rene and Malgorzata Grybos and Gilles Guibaud and Jakub Kierczak and Eric D ...
BioMetals 1992, 5,169-172 Leaching of copper converter slag with Aspergillus niger culture filtrate Lal Bihari Sukla, RaN Narayan Kar & Vinita Panchanadikar Regional Research Laboratory, Bhubaneswar, Orissa, India Received 20 October 1991; accepted for publication 25 March 1992 Leaching of copper converter slag of M/s Hindustan Copper Ltd, Ghatshila (Bihar, India) was …
An Aspergillus aculateus strain was capable of producing agriculturally ... Myconanomining (Fungi mediated bioleaching and conversion of bulk metallic elements/compounds into nanostructures) is ... casted on a carbon-coated copper grid and air dried under dark conditions. The prepared grid was analyzed at an accelerated
Bioleaching of copper from WPCBs using Aspergillus niveus at 37°C and 180 rpm The comparison of all the bioleaching approaches is represented in Figure 9 . The variation in metal extraction from WPCBs by different bioleaching approaches was found to be statistically significant using Student's t -test as in Figure 9 .
An innovative, economical, and environmentally sound hydrometallurgical process has been proposed for recovering Cu, Ni, and Co from copper-rich converter slag by organic acids. In the leaching experiments, the effects of organic acid concentrations, pulp density, temperature, and time were investigated. Optimum recovery of 99.1% Cu, 89.2% Ni, 94% Co, and 99.2% Fe …
copper and iron from dump bioleaching solution from Dexing Copper Mine using LIX® 984N. Kinoshita et al. (2003) reported the separation of copper and nickel from nitrate media containing 11 180 mg/L Cu and 1160 mg/L Ni using 200 g/L LIX® 984. Extraction and separation of copper and nickel by LIX® 984N from ammoniacal medium was
The conversion of insoluble metals to soluble ones by microorganisms is called bioleaching. Bacteria like Chromobacterium violaceum, Pseudomonas species, Sulfobacillus thermosulfidooxidans, and Acidiphilium acidophilum bioleach gold, silver, nickel, and copper of electronic wastes. There are different fungi like Aspergillus niger,
Bioleaching of copper converter slag of MIS Hindustan Copper Limited, Ghatsila, India, was carried out using a strain of Aspergillus niger …
Leaching of copper converter slag of M/s Hindustan Copper Ltd, Ghatshila (Bihar, India) was carried out usingAspergillus niger culture filtrate. The effects of the duration of leaching, temperature, pulp density and the addition of hydrochloric acid were studied.A. niger culture filtrate solubilized metals from the converter slag at levels of 18.70% copper, 7.40% nickel and …
Bioleaching of the converter slag was studied on bench scale using Thiobacillus Ferroxidens, an iron oxidising bacteria for recovery of valuable metals at room temperature. Parameters such as particle size, pH, pulp density, Fe (II)/Fe(III) ratio and amount of Fe(II), additives etc., were optimised to treat the slag. In bioleaching with samples-1, 98.0% Cu in 50 days, 60.0% Ni in …
The copper recovery from low-grade copper sulfide ore was investigated using microbial leaching. Several parameters substantially affect the bioleaching of copper; among them, pulp density and nutrient media were selected for investigation. The optimum conditions for copper recovery were a pulp density of 5 g/mL, a mixed-mineral salt medium of …
Abstract The leaching of copper, nickel and cobalt from polymetallic manganese nodules from the Indian Ocean was investigated using a fungus — Aspergillus niger. Parameters such as initial pH, pulp density, particle size and duration of leaching were optimized for the bio-recovery of metals. At an initial pH of 4.5, 35 oC temperature and 5% (w/v) pulp density, about …
The copper recovery from low-grade copper sulfide ore was investigated using microbial leaching. Several parameters substantially affect the bioleaching of copper; among them, pulp density and nutrient media were selected for investigation.
ferrooxidans, and Aspergillus niger were used with electric arc furnace (EAF) slag for two-step bioleaching (Hocheng et al., 2014). Acidithiobacillus thiooxidans, Pseudomonas putida and Aspergillus niger were tested with roasted Linz-Donawitz converter slag for vanadium recovery (Mirazimi et al., 2015) in one and two-step bioleaching. However,
The bioleaching process was carried o … Removal of vanadium from Linz-Donawits (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).
Trace elements are processed by using sulfur oxidizing microorganisms (Aspergillus niger). Heap bioleaching of chalcocite ores is widely used as a relatively low cost process option, especially for marginal deposits. Aspergillus niger has …
Vanadium removal from LD converter slag using bacteria and fungi. ... Pseudomonas putida (heterotrophic bacteria) and Aspergillus niger (fungi). The bioleaching process was carried out in both one-step and two-step process and the leaching efficiencies in both cases were compared. Formation of inorganic and organic acids during the leaching ...
Research highlights Bioleaching and recovery of metals from final smelter slag was studied. Metal yields after 29 days of leaching were 41% Fe, 62% Cu, 35% Zn and 44% Ni. Metals were subsequently precipitated using biogenic sulfide. Over 98% of Cu precipitated at pH ⩾ 2.8 and over 99% of Zn precipitated at pH ⩾ 3.9. The precipitation of Ni and Fe required …
Recovery of heavy metals from Indian LD slag using acidophilic and heterotrophic bacteria: A comparative study Neha Garg1, Suparna Mukherji1 1Environmental Science and Engineering Department, Indian Institute of Technology, Bombay, Powai, 400076, India Keywords: Bioleaching, Indian steel slag, LD slag, Acidithiobacillus ferrooxidans, …
hydrometallurgy. Much research has been conducted on copper recovery from converter slags. In the chemical leaching pathway, Anand [1] leached converter slag (4.03% Cu, 1.99% Ni, 0.48% Co) with ferric chloride and obtained extractions of 92%, 28% and 24% copper, nickel and cobalt, respectively, after 10,800 s (3 h).
bioleaching of heavy metals from hospital sewage sludge using cassava peels fermentation extracts. Sewage sludge sample was collected from the University College Hospital sewage treatment plant, Ibadan, Oyo State, Nigeria and analysed for selected heavy metal concentrations such as Copper (Cu), Zinc (Zn),
In the present study, before bioleaching experiment water washing of an EAF slag was carried out. This reduced slag pH from 11.2 to 8.3. Culture supernatants of Acidithiobacillus thiooxidans (At. thiooxidans), Acidithiobacillus ferrooxidans (At. ferrooxidans), and Aspergillus niger (A. niger) were used for metal solubilization.
The best metal bioleaching efficiency was achieved by A. niger fungus, which extracted approximately 46.92% of Cu, and almost 30.63% of Pb from PCBs. R. oligosporus leached only 8.53 and 19.61% of Cu and Pb, respectively. Key words: Aspergillus niger, bioleaching, Cu, Pb, printed circuit boards, Rhizopus oligosporus.
Biological methods for leaching of nonferrous and noble metals from its sulfide ores are widely applied at industrial enterprises of different countries. This process is based on the use of the oxidative activity of acidophilic microorganisms. Since all bio systems are quite sensitive to the temperature, bacterial leaching process also significantly effects.
Bioleaching of copper converter slag of M/S Hindustan Copper Limited, Ghatsila, India, was carried out using a strain of Aspergillus niger isolated from the Sukinda Lateritic Nickel Ore. The organism was enriched in 2% potato dextrose broth prior to leaching in the same medium with different solid to liquid ratios by varying dextrose concentration from 2–10%.