INTRODUCTION
Petroleum hydrocarbons from oil spills threaten marine life worldwide. Animals become coated in the oil and ingest the contaminants while trying to clean themselves. The toxic effects of petroleum often result in death for much of the surrounding life. Bioremediation offers an efficient solution for cleaning up oil spills. The pollutants are biologically degraded by complete mineralization of the organic contaminants, turning the toxic waste into harmless products such as carbon dioxide, water, inorganic compounds, and cell protein (Das & Chandran, 2010). Although contaminants could be removed by physical means, this does not dispose of the dangerous petroleum hydrocarbons. Bioremediation can clean up our oceans without producing harmful byproducts in a relatively inexpensive way using minimal technology.
HISTORY OF OIL SPILLS
Although bioremediation can be used for many sources of contamination such as pesticides, gas sites, landfills and more, oil spills are a large source of pollution for our oceans. The environment is constantly being polluted by petroleum hydrocarbons due to tanker accidents, offshore drilling, pipeline leaks, and from cars whose oil gets washed down ocean drains when it rains (Margesin et al., 2007). In 1979 there was an offshore drilling spill in the Mexican coast releasing 400 thousand tons of oil. In 1989, the Exxon Valdez oil spill leaked over 14 thousand tons of oil into Alaskan waters (Swannell et al., 1996). In 1991, Iraq intentionally “spilled” over 14 million tons of crude oil into the Persian Gulf. In 2000, there was an oil spill from pipelines in Guanabara Bay releasing more than one thousand tons of oil. In November 2002, the Prestige sank to the bottom of the ocean after bre...
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The premise of Theo Colborns’ research was to find the connection between the rising incidences of cancer and environmental contamination in the Great Lakes region. However, during field and laboratory studies, Colborn discovered that there was no direct link between the contamination and cancer. However, Colborn did find reoccurring patterns of abnormal behavior and deformed offspring amongst the wildlife populations in the Great Lakes region. Elevated levels of polychlorinated biphenls (PCBs), pesticides dieldrin, DDT, lindane and chlordane were found during tissue analysis of the wildlife in the Great Lakes region (Colborn et. Al 1996). These elevated levels were found in offspring of the wildlife who appeared to be healthy. This supported Colborns’ hypothesis that these contaminations disrupt hormones produced by the endocrine system during growth and development, which will then cause physical and behavioral abnormalities in the fetus.
In 2010, there was a huge oil spill near the Gulf of Mexico that we now know as the BP Oil Spill today. The Spill sent about 170 million barrels of crude oil into the Gulf of Mexico. The spill killed 11 men aboard the deep-water Horizon. The BP Oil Spill impacted the environment very negatively. There were different types of environmental impact as a result of the Oil Spill, but the two that grabbed my attention the most are the Polluted Air and the Contaminated Food Chain. The first impact that grabbed my attention was the Polluted Air. Because of the Oil Spill, the air around the surroundings neighborhoods was polluted. All the lightest chemicals in the oil that had spill evaporated within hours of the incidence forming air pollution particles. These particles that are in the air poses significant threats to the human health from being inhaled. The chemical found in the particles that was formed is known as Volatile, which has been known to cause respiratory irritation and central nervous system depression (Solomon & Janssen, 2010). The second impact that grabbed my attention was the contamination of the food chain, specifically the food chain of sea animals that lives near the Gulf of Mexico. Scientists found traces of oil in zooplanktons; this could only mean that the sea creature has had contact with the spilled oil. According to the Staff at Houston Business Journal (2012), “Baby fish and shrimp feed on the tiny, drifting zooplankton, and then introduce contamination and pollution to the larger sea creatures in the food web.” With these findings, it isn’t going to take long before the baby fishes become grown and caught by fishermen and before we know it, it’s on our dinner plate. And here we are eating fishes w...
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On April 20, 2010, the Macondo wellhead BP pipe leaked crude oil and gas on the ocean floor into the Gulf of Mexico 42 miles off the Louisiana coast (Gulf Oil Spill). This oil spill is known as the largest spill in U.S. history. The pipe was located 5,000 feet underwater where there are temperatures just above freezing and extremely high pressures (Gulf Oil Spill). Oil spewed from this pipe non-stop for 87 days (Gulf Oil Spill). About twenty percent of it ended up on the ocean floor or on the surface (Gulf Oil Spill). Since it’s hydrophobic, the oil on the surface spreads out and forms slicks. These slicks greatly affect ecosystems and animals. The oil that didn’t end up on the floor or surface hovered in the middle of the ocean, forming layers of oil (Gulf Oil Spill). All 200 million gallons of crude oil mixed throughout the ocean and affected coastal and deep-sea sediments (Gulf Oil Spill). Although the pipe was capped on July 15, 2010 (Gulf Oil Spill), much of the oil still remains on the Gulf floor today.
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Because it is the most highly publicized of the different forms of ocean pollution, oil spills, oil leakages, and general oil contamination are something that we all seem to be aware of. Since the Exxon Valdez incident, the American public in particular has been more and more critical of oil companies.Each year, over 700 million gallons of oil end up in the ocean. Contrary to what you may have thought, most oil pollution doesn't come from tanker accidents. In fact, tanker accidents account for less than 90 million of the g...
Most people believe that one man-made natural disaster would teach us to be better, but we have learned that history repeats itself. The Exxon Valdez oil spill (in 1989) and the Deepwater Horizon oil spill, or BP oil spill, (in 2010) were both devastating oil spills that shocked the nation. The Exxon Valdez oil spill occurred due to a tanker grounding. The BP oil spill was caused by an explosion on the Deepwater Horizon oil platform. These two oil spills were both disasters and had greater effects in certain categories. In this essay, I will be comparing the cause of both oil spills, the damage/effect of both oil spills, and the cleanup of each oil spill.
The Athabasca oil sands are the second largest producer of crude oil in the world, with a surface area of approximately 100 000 square kilometres (Anderson, Giesy & Wiseman, 2010). The Alberta Energy and Utilities Board estimates that the oil sands contains approximately 1.7 trillion barrels of crude bitumen, however only 19% can be ultimately recovered (Raynolds, Severson-Baker & Woynillowicz, 2005; Humphries, 2008). The availability of recoverable bitumen makes Canada’s oil sands deposit larger even than that of Saudi Arabia (Czarnecki, Hamza, Masliyah, Xu & Zhou, 2004).The process of surface and in situ mining of the Athabasca oil sands is causing rapid and significant degradation of the regional environment surrounding Fort McMurray and the Athabasca River. Production is expected to increase to three million barrels per day by 2015 from approximately 2 million currently (Humphries, 2008). This increase will further exacerbate the existing environmental impacts of crude oil production. The Canadian oil and natural gas industry is extremely lucrative, but despite the short-term economic benefits of the mining of the Athabasca oil sands, the remediation of the negative environmental impacts of the extraction of oil on terrestrial and aquatic environments, biodiversity, and greenhouse gas emissions are a priority.
" Oil is the life blood of our modern industrial society. It fuels the machines and lubricates the wheels of the world’s production. But when that vital resource is out of control, it can destroy marine life and devastate the environment and economy of an entire region…. The plain facts are that the technology of oil-- its extraction, its transport, its refinery and use-- has outpaced laws to control that technology and prevent oil from polluting the environment…" (Max, 1969). Oil in its many forms has become one of the necessities of modern industrial life. Under control, and serving its intended purpose, oil is efficient, versatile, and productive. On the other hand, when oil becomes out of control, it can be one of the most devastating substances in the environment. When spilled in water, it spreads for miles around leaving a black memory behind (Stanley, 1969).
The Gulf of Mexico oil spill has had an extremely negative effect on the surrounding wildlife and ecosystem. The oil spread across the gulf contaminating any living organism that came into direct or indirect contact with it. The oil cuts off the ability of oxygen from the air to move into the water which directly harms fish and other marine wildlife that require that oxygen. The dispersant that the BP is using to try and break up the oil moves the slick into the entire water column which contaminates the ocean floor which would most likely not have seen any damage if it wasn’t for the use of these dispersants. More than 400 species that live in the Gulf Islands and marshlands are at risk and as of November 2 s...
One of the most famous pollution threats of the bay was the Oil Spill of 2007. A tanker hit the wall of the bay, and a total of 58,000 gallons of oil was spilt into the water of the San Francisco Bay Area. The spread of the oil was so severe that the governed of the States came to see the progress that he inducted during the cleanup. Initial investigation of the extent to which the spill had affected the ecosystem of the San Francisco Bay area took twelve hours. There are the different conclusion that was arrived at after the
“ Effects of Oil Spills on Marine and Coastal Wildlife” Holly K. Ober. WEB. 19 May 2014
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