Bioleaching is the biological conversion of an insoluble metal compound to a water soluble form. Bioleaching is the extraction of specific metals from their ores through the use of bacteria. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic. Biomining presentation free download as powerpoint presentation.
Apr 17, 2004 bioleaching definition is the extraction of valuable metals such as copper and gold from ores through the action of microorganisms such as bacteria. Brogim turbine floating agitator economic assessment experimental design. Due to an increase in consumerism, heightened dependence. Biomining is the biotechnology that uses microorganisms to recover metals, in particular copper and gold, from ores and concentrates. Ppt biomining and bioleaching powerpoint presentation. Recent development has shown commercial application of the process and, concurrently, details pertaining to the key microorganisms involved in these processes have been described. Extraction of metals card sort phytomining and bioleaching. An industrial bioleaching plant for the treatment of a refractory gold concentrate. Pictures of each step in the process, a description to link to and differentiated questions.
Bioleaching is the process by which metals are dissolved from ore bearing rocks using microorganisms. Heap bioleaching of copper ores historical and current cu production tyear. Mesophiles moderately thermophilic bacteria extremophiles. Find powerpoint presentations and slides using the power of, find free presentations research about. The process of leaching metals from ore by using bacteria or fungi to convert the metals into a soluble form. The future of bioleaching isolate new bacterial strains from extreme environments, such as minedrainage sites, hot springs, and waste sites, and use these to. Finally, this work attempted to extract copper from a lowgrade ore using bioleaching techniques.
Microbial oxidation of gold ores and gold bioleaching. Thermophilic bacteria hetrotrophic bacteria and fungi 1. The future of bioleaching isolate new bacterial strains from extreme environments, such as minedrainage sites, hot springs, and waste sites, and use these to seed bioleaching processes. Bioleaching definition of bioleaching by the free dictionary. Jul 01, 2015 bioleaching of heavy metals from a lowgrade mining ore using aspergillus niger. Improve isolates by conventional mutation and selection or by genetic engineering. Bioleaching of metal sulfides is caused by diverse groups of bacteria.
Information and translations of bioleaching in the most comprehensive dictionary definitions. Optimization of parameters affecting recovery of copper from. This is much cleaner than the traditional leaching processes like heap leaching using cyanide or other chemicals. Bioleaching is the extraction of metals from their ores through the use of living organisms. Powerpoint is topdrawer presentation software, and the 2016 mac edition gains a handful of useful additions to keep the tool vital. Bioleaching of gold, copper and nickel from waste cellular. Metal recovery from sulfide minerals is based on the activity of. Having developed from a very simple operational in terms of both engineering and biology process, biomining has developed into a multifaceted technology, to the extent that many of the largest industrial stirred tanks and heaps throughout the world are. Phytoming and bioleaching extraction of copper from ores bioleaching advantages we can use waste ores, reducing the impact of mining on the environment. Having developed from a very simple operational in. When it comes to presenting a project or idea, giving a conference or explaining any. Bioleaching processes are originated in the mining industry.
This is much cleaner than the traditional leaching processes like heap leaching using cyanide or other. Names of worlds major mines producing copper through mass bioleaching 12. The environmental consequences of mining and quarrying are vast, as highlighted in the mining section. Find powerpoint presentations and slides using the power of, find free presentations research about copper bioleaching ppt. Methods of metal recovery by microorganisms 2 methods. We are currently using them in a modified way to treat residues form waste incineration plants containing minerals and metals. Ppt biotechnology in india powerpoint presentation free. Scribd is the worlds largest social reading and publishing site. This is much cleaner than the traditional method using cyanide. Some of the types of bacteria used in this process include leptospirillum ferrooxidans, thiobacillus. Pictures of each step in the process, a description to. In an effort to develop alternate techniques to recover metals from waste electrical and electronic equipment weee, this research evaluated the bioleaching efficiency of gold au, copper.
Introduction bioleaching is the simple and effective technology for. View bioleaching ppts online, safely and virusfree. Some of the types of bacteria used in this process include leptospirillum ferrooxidans, thiobacillus ferrooxidans, and some species of sulfolobus, acidianus, and sulfobacillus. Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt. Bioleaching is getting metals from their ores by using living organisms. With the mac version of microsoft powerpoint from the famous office suite, you can create all sorts of presentations integrating multimedia elements. Bio leaching group members mehwish nazeer, kanza saleem, nazish mehmood m. Oct 19, 20 cards for pupils to create a flowchart on how pure copper is obtained from lowgrades ores via bioleaching and phytomining. Biomining presentation chemistry natural materials free.
Soil microorganisms are very closely involved as catalytic agents in. Determining the bioleaching ability, ph and fungal biomass after incubation, fungal mycelium was separated from the culture medium by vacuum filtration and dried at. View and download powerpoint presentations on copper bioleaching ppt. Bioleaching is a new technique used by the mining industry to extract minerals such as gold and copper. Analysis ni with aas mixed culture of microorganisms were provided by mintek, south africa statistically ph, particle size, pulp density and type of substrate are significant factors in the bacterial. Bioleaching accessscience from mcgrawhill education. The bioleaching of the nodules was carried out in two different ways a leaching during the growth of the isolate and b leaching by spent liquor after removal of fully grown cells. The oxidizing agent ironiii for the metal sulfides originates from the microbial ironiioxidation. Column leaching operate in the principle of precolator leaching used as model for heap or dump leaching process column may be made of glass, plastic, lined concrete or steel. Heap bioleaching of ores a rapidly developing technology undoubtedly, heap bioleaching has had a considerably bigger impact on the base metal industry than tank bioleaching. The technology has its origins in chile, where acidsoluble copper oxide heap leach operations were adapted to treat secondary copper sulfide ores.
Bioleaching bioleaching is the extraction of metals from their. Bioleaching technology in minerals processing john neale mintek, biotechnology division private bag x3015, randburg, 2125, south africa bioleaching is a process that employs microorganisms to dissolve leach sulphide minerals. Mineralogical characterization of chalcopyrite bioleaching. Bioleaching is a simple and effective technology for metal extraction from lowgrade ores and mineral concentrates. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly thiobacillus ferrooxidans and t. Bioleaching definition is the extraction of valuable metals such as copper and gold from ores through the action of microorganisms such as bacteria. Files included 1 copper bioleaching and phytomining. Due to an increase in consumerism, heightened dependence on technology, and an overall world population growth, more and more minerals and metals need to be extracted from the earths surface as shown in figure 1. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Furthermore, ferrous ions promoted chalcopyrite bioleaching below the critical potential, in this case around of 430 mv, which caused enhanced copper removal on days 115.
Bioleaching article about bioleaching by the free dictionary. Bioleaching is performed mostly by iron and sulfide oxidizing bacteria, or acid producing fungus. Bioleaching rate and sulfide dissolution yields wide range of do concentration below and above 6ppm oxygen transfer biomass to study bioleaching efficiency vs. This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is a simple and effective technology for metal extraction from lowgrade ores. Soil microorganisms are very closely involved as catalytic agents in many geological processes.
Cards for pupils to create a flowchart on how pure copper is obtained from lowgrades ores via bioleaching and phytomining. In an effort to develop alternate techniques to recover metals from waste electrical and electronic equipment weee, this research evaluated the bioleaching efficiency of gold au, copper cu and nickel ni by two strains of aspergillus niger in the presence of goldplated finger integrated circuits found in computer motherboards gficms and cellular phone printed circuit boards. Gold bioleaching of electronic waste by cyanogenic bacteria and its enhancement with biooxidation. Bioleaching definition of bioleaching by merriamwebster. Get the students to arrange the cards onto a3 paper and annotatebuild a flow chart. The plants absorb copper ions through their roots the plants are then burnt to ashes containing copper ions. At present, bioleaching is employed on a large commercial scale to extract. These include mineral formation, mineral degradation, sedimentation and geochemical cycling. The leaching efficiency was observed to be more or less the same in both the cases confirming that metabolites produced during growth of the microorganism, played a. Broadway, red lodge, mt 59068, usa received 11 january 1994. Bioleaching is a process that employs microorganisms to dissolve leach sulphide minerals. Phytomining involves growing plants on top of low grade ores. Microsoft powerpoint 2016 for mac free download and.
Phytomining and bioleaching gcse triple award revision. Objectives after the end of the presentation well know biohydrometallurgy and its applications bioleaching. Created using powtoon free sign up at youtube create animated videos and animated presentations for free. Bioleaching is one of latest technologiesthe used to recover many important metals like copper. Brief overview of microsoft powerpoint 2016 for mac os x. The dissolution biochemistry signifies two types of. In microbial leaching or bioleaching metals can be extracted from large quantities of low grade ores this process has been used for centuries to recover copper form the drainage water of mines the role of microbes in the bioleaching came into notice some 40 years ago. Leaching generally refers to the removal of a substance from a solid via a liquid extraction media. Objectives after the end of the presentation well know biohydrometallurgy and its applications bioleaching microorganisms involved in bioleaching bioleaching process factors and parameters influencing bioleaching advantages and disadvantages of bioleaching bioleaching of some metals gold. Ppt leaching powerpoint presentation free to download. Bioleaching technology in minerals processing john neale mintek, biotechnology division private bag x3015, randburg, 2125, south africa bioleaching is a process that employs microorganisms to.
Column leaching operate in the principle of precolator leaching used as model for heap or dump. Oct 05, 2006 biomining is the biotechnology that uses microorganisms to recover metals, in particular copper and gold, from ores and concentrates. Recent development has shown commercial application of the process and, concurrently, details. Bioleaching of heavy metals from a lowgrade mining ore using aspergillus niger. The metals can be recovered by the microorganisms by two processes. Bioleaching definition of bioleaching by medical dictionary. Microsoft powerpoint 2016 for mac is an application which can be used for creating some stellar presentations. We would like to show you a description here but the site wont allow us. Bioleaching simple english wikipedia, the free encyclopedia. At present, bioleaching is employed on a large commercial scale to extract metals from sulfide minerals. In general, bioleaching is a process described as being the dissolution of metals from their mineral source by certain naturally occurring microorganisms or the use of microorganisms to transform elements so that the elements can be extracted from a material when water is filtered trough it atlas and bartha, 1997. Bioleaching microbial leaching, being an economical and environmental friendly process, is investigated extensively for metal extraction from secondary solid wastes, viz. Bioleaching application of biotechnology in mining industry.
In recent years, a new discipline of mineral science namely biohydrometallurgy or. In general, bioleaching is a process described as being the dissolution of metals from their mineral source by certain naturally occurring microorganisms or the use of microorganisms to transform. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. This biotechnical process, involving bacteria, archaea, fungi, and yeast, can be applied to both sulfide and nonsulfide minerals. Alteration of groundwater and sediment geochemistry in a sulfidic backswamp due to melaleuca quinquenervia encroachment. It finds application in the extraction of metals from their ores. Introduction bioleaching is the simple and effective technology for metal extraction from low grade ores and mineral concentrate by the use of micro organisms. Oct 10, 2017 created using powtoon free sign up at youtube create animated videos and animated presentations for free. Sand w, tilman g, jozsa pg, schippers a 2001 biochemistry of bacterial leachingdirect vs indirect bioleaching. Thus, this fungal strain was only assessed in combination with a. Bioleaching of chalcopyrite university of birmingham.
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