Rehabilitation Of Industrial Tailing Ponds
Everyone knows that mining is a process to extract materials, minerals, petroleum and gas from the deep down of the grounds. This process is consist of two methods, first is called placer mining in which to extract valuable minerals and the second method is hard rock mining which helps to extract the ore and then relies on chemical reactions to concentrate the sought-after material. Mining is a very big process and needs too many things to consider but when it come to actually start extraction, it is very much possible that to extract any specific mineral, the need of removing rocks and other materials present on top of it would need to be removed first, and the piles of these materials is known as tailing. It can be consist of mine dumps, culm dumps, slimes, tails, refuse, leach residue or slickens, are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore.
Some of these tailings submerged in a wet storage area and some of them can be stored on dry land such as sand. These ponds can be created through dams, berms, and “natural features such as valleys, hillsides or depressions. In the act of 2002 of the federal Metal Mining Effluent Regulation of the Fisheries, it has been said that lakes can also be used as tailing pond area.
Because the tailing can be the result of any mining process so it can have many, many substances such as tonnes of nickel, kilograms of lead, kilograms of mercury, tonnes of cobalt, kilograms of cadmium and much more and tailing from oil sand can have naphthenic acids, polycyclic aromatic hydrocarbons, phenolic compounds, ammonia, lead, mercury, and other metals.
Tailing ponds can be very risky for the environment of the surrounding, damaged tailing ponds can contain a large amount of toxins which can be released into the environment and make it unhygienic. It is not that ponds leak the toxic at once, no they leak it slowly and gradually depends on the damage that has happen to the pond. Sometimes people notice about me after a very long time. A new federal study released earlier this year found evidence that strongly suggested that the contents of Alberta’s tailing ponds are seeping into the Athabasca River. The study finds out that the oilsands compounds with chemical signatures matching the tailings ponds in upward flowing groundwater less than a meter below the river. All these things can be very harmful for sea animals and wildlife. The amount of the oil present in the ponds because of many materials can cause them to sink to the bottom of the ground. Many people and organizations have said that making lake tail storing area has result in the killing of fishes.
The risk to the environment from tailing ponds cannot end but to minimize it, industries have come with the idea of less interaction between tailing and the local environment to prevent acid generation and metal leaching. They are also using different methods to remove water from failing so that they can dry off and there won’t be any risk of falling. People are also thinking that How Can Tailing Ponds Be Rehabilitated to control the risk more. For that, many industries are using thermal membrane technologies.