The knowledge is mainly for aqa but it will apply to other boards too. Thermal decomposition means that the compound breaks down into other substances when it is heated. Revising for gcse is just so important but revision boredom can easily setin. The traditional method used for leaching purpose is done through heap reactors whose charecteristics may vary much with that of the modern bioleaching process. At present, bioleaching is employed on a large commercial scale to extract metals from sulfide minerals. Phytomining and bioleaching gcse triple award revision. Bioleaching or biomining is a process in mining and biohydrometallurgy natural processes of interactions between microbes and minerals that extracts valuable metals from a lowgrade ore with the help of microorganisms such as bacteria or archaea. Bioleaching factsheet and questions teaching resources. Biomining is the biotechnology that uses microorganisms to recover metals, in particular copper and gold, from ores and concentrates. Nov 23, 2011 this website and its content is subject to our terms and conditions.
The 91 aqa specification for gcse chemistry, examined from summer 2018. The process of extracting the specific and useful metals from their ores using the bacterial organisms is defines as bioleaching. Search the worlds most comprehensive index of fulltext books. Phytomining and bioleaching for the new gcse do now. Bioleaching is a simple and effective technology for metal extraction from lowgrade ores and mineral concentrates. The future of copper phytomining, bioleaching and scrap iron some plants absorb copper compounds. Bioleaching impact factor omics international journal of. Questions 42 publications 21,217 questions related to bioleaching. These include mineral formation, mineral degradation, sedimentation and geochemical cycling. Three fungal strains were found to be capable of bioleaching rare earth elements from monazite, a rare earth phosphate mineral, utilizing the monazite as a phosphate source and releasing rare earth cations into solution. Some bacteria can live by using the energy of the bond between sulfur and copper.
Bioleaching and phytomining are increasingly used to extract copper from low grade ores see below. Bioleaching is the extraction of a metal from sulfide ores or concentrates using materials found native to the environment. Bioleaching of rare earth elements advanced science news. The plants absorb copper ions through their roots the plants are then burnt to ashes containing copper ions.
Soil microorganisms are very closely involved as catalytic agents in many geological processes. This biotechnical process, involving bacteria, archaea, fungi, and yeast, can be applied to both sulfide and nonsulfide minerals. Universal reserves of highgrade ores are diminishing at an alarming rate due to the rapid increase in the demand for metals. Buy aqa gcse life and environmental sciences for combined science.
I have used it as resource to teach gcse physics and when covering a set 1 biology group for a colleague, and found the internet links to videos particularly helpful in engaging pupils with the more difficult material in the course. Explore the latest questions and answers in bioleaching, and find bioleaching experts. The dissolution biochemistry signifies two types of. Gcse scienceenvironment wikibooks, open books for an open. Files included 1 copper bioleaching and phytomining. It finds application in the extraction of metals from their ores.
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. Bioleaching is the extraction of metals from their ores through the use of living organisms. Copperii sulfide gives copper and sulfur dioxide during thermal decomposition. The kings school grantham year 10 chemistry curriculum. Bioleaching can extract metals from ores that are too poor for other technologies. Alkali and transition metals, the reactivity series, displacement reactions, metal extraction from their ores, the ph scale indicators and neutralisation, and salts. Remember to like, share and comment subscribe for more. 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. This is much cleaner than the traditional heap leaching using cyanide. Bioleaching impact factor bioremediation is a waste management technique that involves the use of organisms to remove or neutralize pollutants from a contaminated site. Phytomining involves growing plants on top of low grade ores.
Gcse science chemistry 91 triple the haber process duration. To provide an appealing aperitif of whats on offer. Covering aqa, edexcel and ocr exam boards with a huge array of topics, weve got everything you need to help your students bond with chemistry. This website and its content is subject to our terms and conditions. Gcse sciencecells wikibooks, open books for an open world. It is mainly used to recover certain metals from sulfide ores. 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. Synergy 91 student book gcse science 91 by walker, gina, bloom, katy, shirazi, shaista, walsh, ed isbn. Our teacher written quizzes provide an alternative to textbook swatting in the key subjects of english, english literature, maths, science, biology, chemistry, physics, geograpy, history and re religious education. These ions are leached from the ash using sulfuric acid. Bioleaching of metal sulfides is caused by diverse groups of bacteria. 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. Students are given a storyboard and are asked to use it to answer the questions. It has the advantage that it is very energy efficient typically using only 30% to 50 % of the traditional method.
The resource is suitable to use for gcse chemistry aqa using resources and ocr chemicals of the natural environment units the first task is a sorting activity in which students sort statements related to bioleaching and phytomining. Pictures of each step in the process, a description to link to and differentiated questions. Gcse chemistry extraction of copper thermal decomposition. Events links homepage urgent message to parentscarers school buses leaving early. Bioleaching application of biotechnology in mining industry. In telophase, the chromosomes, which were distinct and condensed, begin to disperse into a tangle of dense material. The kings school grantham isaac newtons school menu. Oct 15, 2016 universal reserves of highgrade ores are diminishing at an alarming rate due to the rapid increase in the demand for metals. In other words, bioleaching is the commercialization of the ability of certain bacteria and archaea, found in nature, to catalyze the oxidation of sulfide minerals. Using scrap iron iron is more reactive than copper. Bioleaching definition of bioleaching by the free dictionary. Dec 18, 2006 biomining is the biotechnology that uses microorganisms to recover metals, in particular copper and gold, from ores and concentrates.
The solution is called a leachate and the process is called bioleaching. Great minds hank introduces us to alfred wegener, a voraciously curious guy who proposed the original theory of continental drift and was laughed at for it. Bioleaching top journals omics international journal of. Biomining is the extraction of specific metals from their ores through biological means, usually microorganism.
This separates the metal from the ore and is called bioleaching. Purification of copper by electrolysis metal extraction reduction of ores phytomining bioleaching raw materials electrode equations furnace smelter description of processs gcse igcse o level ks4 science. Methods of metal recovery by microorganisms 2 methods. Gcse science jump to navigation jump to search there are several main points within the metals topic, which are. Bioleaching certain bacteria can break down lowgrade ores to produce an acidic solution containing copper ions. Aqa gcse life and environmental sciences for combined. The process of extracting the specific and useful metals from their ores using the bacterial organisms is. In recent years, a new discipline of mineral science namely biohydrometallurgy or. In subsequent processes, different from bioleaching, the metal is recovered from the leachate bacterial oxidation such as bioleaching or biooxidation on a commercial scale has been done on sulfide metal bearing materials such as arsenopyrite, pyrite, pyrrhotite, covellite and chalcocite ores and concentrates, the one. It can be used to partially replace the extensive crushing and grinding that translates to prohibitive cost and energy consumption in a conventional. Gcse sciencemetals wikibooks, open books for an open world. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly thiobacillus ferrooxidans and t.
Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq. Biological methods of metal extraction higher material. Copper extraction chemistry bibliographies cite this for me. Oct 19, 20 cards for pupils to create a flowchart on how pure copper is obtained from lowgrades ores via bioleaching and phytomining. Biomining is done in two steps often called bioleaching and biooxidation. Bioleaching accessscience from mcgrawhill education. Bioleaching of rare earth elements from monazite sand. Bioleaching is the process by which metals are dissolved from ore bearing rocks using microorganisms. Feb 02, 2017 bioleaching bioleaching or biooxidation employs the use of naturally occurring bacteria, harmless to both humans and the environment, to extract of metals from their ores. Recent development has shown commercial application of the process and, concurrently, details pertaining to the key microorganisms involved in these processes have been described.
Recent commercially relevant developments in the biohydrometallurgy of zinc are discussed with respect to brisa, hydrozinc, heap bioleaching, and stirred tank biooxidation of mixed concentrates. A nuclear envelope reforms around each cluster of chromosomes. 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. Gcse physics gcse science 7th grade science mad science teaching science teaching ideas earth science lessons earth and space science earth space alfred wegener. Dec 12, 2016 metal extraction bioleaching and phytomining. Gcse is the qualification taken by 15 and 16 year olds to mark their graduation from the key stage 4 phase of secondary education in england, northern ireland and wales. Bioleaching definition of bioleaching by merriamwebster. 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. The metals can be recovered by the microorganisms by two processes. Bioleaching definition is the extraction of valuable metals such as copper and gold from ores through the action of microorganisms such as bacteria. Tes global ltd is registered in england company no 02017289 with its registered office. Ive been impressed with both the quality and usefulness of thinkie resources. Bioleaching microbial leaching, being an economical and environmental friendly process, is investigated extensively for metal extraction from secondary solid wastes, viz.
The spindle begins to break apart, and a nucleolus becomes visible le in each daughter nucleus. Beyond offer highquality secondary resources that have been designed by teachers with you in mind. May i just add, my predictions are just a wild guess on what has not appeared on the specimen papers from aqa and from researching the specification, i want to remind you all to cover the full content use revision guides for tips on this just to ensure you do not get any nasty surprises on the exam. Jan 20, 2016 in this new study, vanessa brisson and lisa alvarezcohen from the university of california, berkeley, ca, usa, and weiqin zhuang from the university of auckland, auckland, new zealand, investigate bioleaching of rare earth elements rees from monazite sand as a potential alternative to conventional extraction. The traditional method of extraction is to heat the copper sulfide. Bioleaching principles, mechanisms, and applications for extraction of zinc, nickel, and cobalt are illustrated. Mineralogical characterization of chalcopyrite bioleaching. Phytomining and bioleaching flashcards in gcse chemistry. Bioleaching does not need high temperatures, but it produces toxic. Bioleaching top journals bioremediation is a waste management technique that involves the use of organisms to remove or neutralize pollutants from a contaminated site. Gcse quizzes in english, maths, science and many other subjects. Conversion of insoluble metal sulfides into watersoluble metal sulfates. Bioleaching is a preparatory step to metal recovery.