Phytoremediation: Green Technology for the Future
Phytoremediation is the process by which plants and trees are used to remove or stabilize hazardous pollutants that exist in soil, sediments, surface water or groundwater. The EPA (environmental protection agency) estimates that more than 30,000 sites in the U.S. are in need of environmental treatment, and a great number of these sites are contaminated with highly toxic metals. Abandoned or under-used commercial and industrial facilities, termed as “brownfields,” are a major contributor to this environment concern. “Brownfields” pose significant health risks to nearby residential populations and threaten the plant and animal life close to them. Phytoremediation provides a very effective and comparatively low cost way to extract, detoxify or immobilize a wide variety of these materials such as lead, arsenic and mercury. In addition to toxic metals, phytoremediation can also be employed in order to remove organic solvents, pesticides and radionuclides. The wide variety of environmental problems concerning soil, sediment and groundwater contamination correlates to the diverse set of techniques and strategies that are encompassed under the banner of phytoremediation technology.
Among the different phytoremediation methods that are utilized by scientists, phytoextraction is arguably the most important application of this technology because it works to remove inorganic metals from brownfields and other sites with contaminated soil and sediment. Whereas other sites that are contaminated with organic contaminants or farming pesticides are able to be treated with a wide variety of remediation methods, the selection of treatment options is smaller when dealing with brownfields. Norm...
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Lane, Stuart. “Banning Animal Testing May Be Hazardous to Your Health.” Priorities Spring 2013: 23.
Respect is a quality that is almost always expect of one in all societies. Why should it be any different when it comes Canadians and Aboriginals? Known as the “Indian Magna Carta”, the Royal Proclamation of 1763 is an official document issued by King George III himself. One would think this a document or great authority and power; however with a quick look on how Canada treated Aboriginals throughout ...
Today, South Korea is a wealthy and developed country whose economy ranks 12th in the world and has entered the trillion dollar club of world economies. From the GDP per capita of $67 after the Korean War, it has risen to more than $30,000.
US Enviromental Protection Agency. (2010, December 13). Retrieved January 20, 2011, from US EPA Human Health: http://cfpub.epa.gov/eroe/index.cfm?fuseaction=list.listByChapter&ch=49
Being known as a great team player is good for any individuals’ character. Following through on promises, providing high quality timely results by meeting deadlines on projects, goals and maintaining a positive interactions with peers,
Before World War II Japan ruled Korea as one country from 1939-1945. After World War II Korea was split into two countries. The U.S. took the side of South Korea, which was ruled by Syngman Rhee. Syngman Rhee lived March 26, 1875- July 19, 1965. He had a traditional Confucian education then went on to Methodist school where he learned English. He became a nationalist and later a Christian. When he was 21 he joined a group that’s goal was to free Korea from Japan. The club was broken apart and he was arrested from 1898-1904. He earned a PhD from Princeton, becoming the first Korean to earn a Doctorate from an American University. He returned to Korea after it was annexed from Japan. He was elected president of the Korean Provisional Government in Shanghai where he lived for a year and then moved back to Hawaii where he had been living, trying to create an international movement for his country. He remained president for 20 years before being p...
Withgott, J., & Brennan, S. (2011). Environment: the science behind the stories (4th ed.). San Francisco, CA: Pearson Benjamin Cummings.
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Solomon, Gina. “Chemical Testing on Animals Saves Lives.” Earth Island Journal. 17. (2002): 47-49. Gale Opposing Viewpoints in Context. Web. 02 May 2011.
A team player can be associated to any type of profession a person participates. The dictionary defines team players as a number of people associated together in work or activity. Team players are the type of people with a tremendous personality who contribute and motivate themselves in many areas. They include the military, sports, work, and families. However, there are a few things team players are not. Let us explore these aspects closer.
The profession of nursing has both positive and negative effects on the well-being of nurses, which can lead to learning opportunities for those that are new to the profession. To receive an accurate depiction of the nursing profession, an interview with a currently practicing nurse is conducted and the challenges that they face will be analyzed with the intent of exploring different strategies that can be used when coping with these issues. The nurse that was interviewed stated that she has been in the nursing field for the past seventeen years; with the past ten being in the role of a nurse practitioner (Personal Communication, October 26, 2016). The nurse has experience in a variety of settings, as well as holding several degrees and certificates
South Korea’s capital is Seoul. The current leader President Park Geun-hye, who is the first female president in Korea’s history, was elected in 2013. South Korea has a presidential republic government system. Combined with centralized economic planning and government regulation, its mixed economic system gave this developed country a high standard of living (“Introduction” 2014).
Phytoextraction is the uptake and storage of pollutants in the plants stem or leaves. Some plants, called hyperaccumulators, draw pollutants through the roots. After the pollutants accumulate in the stem and leaves the plants are harvested. Then plants can be either burned or sold. Even if the plants cannot be used, incineration and disposal of the plants is still cheaper than traditional remediation methods. As a comparison, it is estimated a site containing 5000 tons of contaminated soil will produce only 20-30 tons of ash (Black, 1995). This method is particularly useful when remediating metals. Some metals are also being recycled from the ash.
As a result of this process, the mine sites "do not develop normal soil structure or support the establishment of a plant cover". Many mine sites have...