These scientists grew the nickel accumulating plant streptanthus polygaloides in plots of nickelrich soil in california, and predicted that a nickel yield of. Bioleaching is the process by which metals are dissolved from ore bearing rocks using microorganisms. Phytomining and bioleaching lesson plan template and teaching resources. Students are given a storyboard and are asked to use it to answer the questions. Natural bioleaching has been taking place for almost as long as the history of the world, but it is only in the last few decades that we have realized that bioleaching is responsible for acid production in some mining wastes, and that this bacterial activity can be used to liberate some metals.
New resources for metals must be developed with the aid of novel technologies. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Find powerpoint presentations and slides using the power of, find free presentations research about copper bioleaching ppt. Bioleaching and phytomining extraction of copper by katie. Examples where phytoremediation has been used successfully include the restoration of abandoned metal mine workings, and sites where polychlorinated biphenyls have been dumped during manufacture and mitigation of ongoing coal mine discharges reducing the impact of contaminants in soils, water, or air. Bioleaching of spent re nery processing catalyst using. Bioleaching is the use of about 20% of the extracted copper in the world came from bioleaching. Improve isolates by conventional mutation and selection or. Ppt biomining and bioleaching powerpoint presentation. Oct 15, 2016 universal reserves of highgrade ores are diminishing at an alarming rate due to the rapid increase in the demand for metals. 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. Ppt biomining and bioleaching leon nyamweda academia.
Unlike traditional excavation, phytomining is dependent on growing conditions such as the weather, altitude and soil quality. These ions are leached from the ash using sulfuric acid. Phytomining can therefore be considered as farming for metals. Bioleaching and phytomining are increasingly used to extract copper from low grade ores see below. Here is a small powerpoint presentation on bioleaching a phytomining. Extracting metals and equilibria education using powerpoint. Elisabeth fischer speaks to ross orr, president and ceo of clean tech company bactech, about how bioleaching bacteria can be used to rid mines of harmful toxins. Bioleaching and phytomining extraction of copper by. It is proposed that the economics of phytomining could be improved by selective breeding of plants with greater blomasss and higher metal concentrations as well as by.
The bacteria we use for bioleaching to oxidise the sulphide materials left behind, occur naturally and are harmless to humans, animals and the environment. As an alternative to smelting or roasting, miners use bioleaching when there are lower concentrations of metal in ore and they need an efficient, environmentally responsible method. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. The main variables that control its economic feasibility are. 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. At these extremes, a plant with a biomass of 20 t ha. Biomining and bioleaching a free powerpoint ppt presentation displayed as a flash slide show on id.
New methods of copper extraction exploit waste ores and low grade ores phytomining involves growing plants on top of low grade ores. Nov 24, 2011 resources for a lesson on phytomining. View and download powerpoint presentations on copper bioleaching ppt. Phytoremediation describes how hyperaccumulator plants remove heavy metals from contaminated soils, while phytomining refers to how hyperacccumulator plants grow and harvest to recover commercially valuable metals in plant shoots from metalrich sites. Bioleaching uses bacterial microorganisms to extract precious metals, such as gold, from ore in which it is embedded. Currently, phytomining has only limited potential application see our 2015 article below. Phytoming and bioleaching extraction of copper from ores bioleaching advantages we can use waste ores, reducing the impact of mining on the environment. What are the advantages and disadvantages of phytomining. Suitable bacteria that can survive at high temperatures, acid concentrations, high concentrations of heavy metals, remaining active under such circumstances, are to be selected to ensure successful bioleaching. Bioleaching application of biotechnology in mining industry. Bioleaching personal page both two papers focused on bioleaching made hypothesis and carried out experiments to test and verify what they thought. Some of the types of bacteria used in this process include leptospirillum ferrooxidans, thiobacillus ferrooxidans, and some species of sulfolobus, acidianus, and sulfobacillus. Phytomining involves growing plants on top of low grade ores.
Use the powerpoint as an introduction to the treatment of waste read more. Cards for pupils to create a flowchart on how pure copper is obtained from lowgrades ores via bioleaching and phytomining. Dec 12, 2016 metal extraction bioleaching and phytomining. Bioleaching is a process that employs microorganisms to dissolve leach sulphide minerals. Energy efficient, using almost half as much energy as traditional extraction. You are allowed to download the video for nonprofit, educational use. Biomining is done in two steps often called bioleaching and biooxidation. Mining companies must be careful of pollution india. A bad growing season could wipe out an entire crop of metalproducing plants, and if global climate change alters weather patterns, the risks associated with establishing a longterm phytomining industry in an area increase. Biomining is the extraction of specific metals from their ores through biological means, usually microorganism. Teaching from september onwards version looking bioleaching and their the.
Phytomining is a green technology that should appeal to the conservation movement as an alternative to opencast mining of lowgrade ores. The advantage of phytomining is that it saves using high grade ores. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Learn the basics about future extraction methods including bioleaching and phytomining.
Chemistry, methods of extracting copper slideshare. The first paper used the mathematical model as a tool to optimize and control the process of uranium bioleaching. One of the benefits or positive sideeffects of bioleaching is the ability to neutralise or stabilise arsenic into a ferric arsenate. Download paper world academy of science, engineering and. Chemistry 10 using resources education using powerpoint. This unit covers topic 4 from the 2016 edexcel course, including. Scrap iron can then be used to displace the copper from the leachate. Students will also evaluate phytomining and bioleaching in comparison with conventional methods for extracting metals. Click here to register and to download this powerpoint file.
Topic 4 extracting metals and equilibria education. Customers affiliates powerpoint tutorial videotour infographics. Aqa c1 phytomining and bioleaching teaching chemistry, gcse. Metal ores are a finite resource which are in limited supply. Bioleaching is a simple and effective technology for metal extraction from lowgrade ores and mineral concentrates. Oct 19, 20 cards for pupils to create a flowchart on how pure copper is obtained from lowgrades ores via bioleaching and phytomining. Explain why phytomining and bioleaching need to be used. Understand phytomining and bioleaching in this worksheet, students will learn how plants and bacteria are used to extract metals from ores. Phytomining article about phytomining by the free dictionary.
Phytomining and bioleaching for the new gcse do now. Copy of bioleaching and phytomining extraction of copper. However the disadvantage is that this is a long process. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Phytomining and bioleaching hwk for 9st1 use the basic descriptions to selfassess your work on these two processes to extend yourself please try to evaluate the methods against traditional methods of extraction in more detail than i have. When we knew that both the capacity and the output size were unable to meet customers demands. Phytominers cultivate crops of a specific plant species with high concentrations of a desired metal, harvest the plant and deliver it to a furnace to burn and gather its bioore.
The plants absorb copper ions through their roots the plants are then burnt to ashes containing copper ions. Describe and explain the difference between phytomining and bioleaching. The separate science or higher tier only content is also clearly labelled, meaning that the slideshows can easily be adapted for double science and lower ability groups as well. Future extraction methods bioleaching and phytomining youtube. View bioleaching ppts online, safely and virusfree. Aqa gcse revision video phytomining and bioleaching check the website for a. The environmental consequences of mining and quarrying are vast, as highlighted in the mining section. It is a viable alternative or supplementary to conventional mining methods of low grade gold ore bodies soil. Copy of bioleaching and phytomining extraction of copper by. This separates the metal from the ore and is called bioleaching. Some bacteria can live by using the energy of the bond between sulfur and copper.
Bioleaching rate and sulfide dissolution yields wide range of do concentration below and above 6ppm oxygen transfer biomass to study bioleaching efficiency vs. Parys mountain copper mines, amlwch wales, 1989 what is the impact of this. Are rockeating bacteria the key to solving the problem of toxic mine tailings. Some of these plants are natural hyperaccumulators, and in others the property can be induced. This website and its content is subject to our terms and conditions. Introduction future sustainable development requires measures to reduce the dependence on nonrenewable raw materials and the demand for primary resources. The extraction process is performed by plants, the plants draw up the elements through their roots, it is stored there as the plant grows and then the plant is burned to produce bioore. Bioleaching or phytomining recycling saves energy saves natural recourses less pollution crude oil a mixture of hydrocarbon. Phytominings potential renders abundant nonviable and undeveloped resources into attainable levels as low as powerpoint presentation. Download metal extraction bioleaching and phytomining in word format. Copperii sulfide gives copper and sulfur dioxide during thermal decomposition. Sep 11, 2017 10 fishing knots for hooks, lure and swivels how to tie a fishing knot duration. It finds application in the extraction of metals from their ores.
Bioleaching commonly refers to biomining technology applied to base metals. However, he economic viability of phytomining improves as the price of metals increases. Evaluate the use of phytomining and bioleaching over traditional extraction methods. Purchasing a subscription for this site enables you to download all of the content on this page and any future updates for the next 12 months. Ppt bioleaching powerpoint presentation, free download id. Phytomining and bioleaching gcse triple award revision. The traditional method of extraction is to heat the copper sulfide.
If finished there are higher level questions to attempt differentiation. 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. This slideshow covers all of the content from the aqa chemistry 3 unit, including. 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. 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. Phytoremediation may be applied to polluted soil or static water environment. Gcse chemistry extraction of copper thermal decomposition. Bioleaching microbial leaching, being an economical and environmental friendly process, is investigated extensively for metal extraction from secondary solid wastes, viz. Future extraction methods bioleaching and phytomining follow us on.
Understand phytomining and bioleaching worksheet edplace. Phytomining of gold is a green approach to the environmentally sensitive and energy intensive practice of mining, involving the use of selective plants to extract valuable metals from both solid and liquid substrates. This is a part of the overall environmental chemistry topic. Bioleaching is performed mostly by iron and sulfide oxidizing bacteria, or acid producing fungus. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly thiobacillus ferrooxidans and t. Phytomining describes the production of a metal crop by using highbiomass plants, which are plants that produce energy or a usable resource when burned.
An industrial bioleaching plant for the treatment of a refractory gold concentrate. Thermal decomposition means that the compound breaks down into other substances when it is heated. It has the advantage that it is very energy efficient typically using only 30% to 50 % of the traditional method. Some of these plants are natural hyperaccumulators, and in. Advantages and disadvantages of bioleaching and phytomining. Feasibility step ii and basic engineering complementary testwork on bioleaching, zinc solvent extraction and electrowinning. Pictures of each step in the process, a description to link to and differentiated questions.