Arsenic contamination in the background is a real problem, in the United States there are more than 560 places contaminated by super funds, followed by places. (2) This problem is very broad and EPA has developed a manual on how to effectively deal with problems. Arsenic contamination occurs in large-scale excavation. The most common are coal mining materials such as coal, various metals, pressurized wood. Copper arsenate is a chemical that began to be used for pressure treatment of wood in the 1940s.
IV. Bioremediation of pollutants is an effective, simple and practical way to eliminate Earth pollution. Bioremediation refers to the use of organisms to reduce pollution and remove environmental pollutants. Bioremediation of organic toxic contaminants is mainly based on microorganisms and is therefore called "microbial bioremediation". On the other hand, bioremediation of inorganic pollutants is performed by specific plant species, so it is called "phytoremediation" (ie bioremediation using plants).
Conversion of environmental pollutants to innocuous forms by the innate abilities of naturally occurring microbial populations is known as unique bioremediation. However, there is an increasing interest in inherent bioremediation to control all or part of the contamination of waste sites. The inherent inherent ability of microorganisms should be tested at the laboratory and field level to metabolize pollutants prior to use in their own bioremediation. Through the onsite monitoring program, the progress of unique bioremediation should be recorded from time to time. Site conditions that promote unique bioremediation are groundwater flow throughout the year and carbonate minerals allevate acidity and microbial growth during biodegradation supply of nutrients without electron acceptor and toxic compounds . Bioremediation of toxic waste mixtures containing metals such as Hg, Pb, As, cyanide can cause problems (Madsen, 1999l)
The aim of bioremediation is to convert toxic hydrocarbons into non-toxic compounds that do not pose a threat to the ecosystem. Bioremediation is performed by specific microbial species under favorable conditions with different modes. However, this process requires more time to display results than using dispersants or other physical methods. Oil spill has become a big controversy over the past few years as the frequency of accidents increases and they pose a threat to us and other lives. Just like a way to suppress some other threats, I discovered various methods and equipment for cleaning operations. Some are cheap and lower maintenance costs, some are expensive and highly maintained; some are environmentally friendly and easy to disposal; some are a threat to marine and terrestrial ecosystems