The vicious circle of pollution from the hottest B

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The vicious circle of BP oil spill pollution has sounded an alarm for China's oil leakage prevention. On June 30, the Beijing Science and Technology News said, "I see that the dark brown, dirty and dirty mixture is constantly scouring the coast. Walking on the beach in sandals, the shoes will be constantly sucked into the sludge. Walking, you will find that you are already barefoot and your toes are full of black sludge." For two months, Dr. jeffwood, an environmental volunteer, has been closely observing the oil spill in the Gulf of Mexico

every day, he would go to the coast to take photos and conduct field monitoring. Wood told the Beijing Science and technology news that the Gulf of Mexico, the world's most biologically diverse Gulf, has been completely closed down by the leaked crude oil. Hundreds of sea turtles, seabirds and dozens of dolphins have died as a result. The coastal soil of all American continents has also been polluted to varying degrees

"At present, Florida has seen bad results. Thick black crude oil has invaded the beaches of the entire Pensacola coast. The sludge mixed with crude oil like pudding covers a 5-kilometer range of the beach. From a distance, the coast seems to have drawn a thick black line. Sharks, dolphins, herring, crabs and some small fish that should have lived in the deep sea have been haunting the Florida coast recently, gathering in large numbers on the shore 。 Just as forest fires will scare away animals in the forest, these marine creatures' swimming to the shore means that the place where they live may be damaged. This place is destroyed. " Wood said that at present, governments around the world are calling on people to donate hair and other items used to collect oil pollution, but it is still a drop in the bucket for the continuously leaking crude oil. He can often hear the fishermen who make the piston rise (10 ~ 20) mm to the nearby area complain that the future is only bad, worse and terrible

when taking photos, he also often encountered dying seabirds covered with oil. The famous Mississippi River in the United States was also under serious threat at this time. The leaked crude oil has been blown by strong sea winds to the mouth of the Mississippi River in Louisiana

this disaster, which originated from the explosion and fire of an oil drilling platform along the coast of Louisiana in the United States and led to oil leakage from the bottom oil well, has also been constantly watched by scientists all over the world

according to satellite images, the European Space Agency recently pointed out that the oil belt formed by the oil spill in the Gulf of Mexico has entered the ocean circulation in the southern Gulf of Mexico. Driven by the ocean current, it may bring a wider range of pollution in the future. Thousands of workers and volunteers have gathered in the Gulf of Mexico to clean up the polluted waters. According to the worst speculation of experts, the Gulf of Mexico oil spill may release 104000 gallons (about 473 cubic meters) of crude oil per hour. What worries environmentalists and ecologists most is that the pollution of crude oil will continue to increase. The US government has also sent a distress signal to scientists all over the world, hoping that mankind can join hands to prevent this most serious ecological disaster in the past decade

mayongan, a researcher of China National Marine Environment Monitoring Center, told us that they are also collecting relevant materials and are ready to provide assistance to US researchers at any time

"Oil spills are the most harmful to birds, especially those that need to dive into the water to prey. After these birds touch the oil film, their feathers will soak in oil. This will directly cause their feathers to lose the ability of water resistance and heat preservation. On the other hand, they will clean their feathers with their mouths because they can't find food. In this process, accidentally eating oil will damage their internal organs. Eventually, these seabirds will die of hunger, cold and poisoning. The marine plankton is also the most vulnerable marine primary organisms to pollution. On the one hand, they are particularly sensitive to the toxicity of oil. On the other hand, they connect with the water body and absorb a large amount of floating oil on the sea surface, which will affect the survival of other marine organisms that feed on plankton

in addition, the oil spill accident is also very harmful to the fishery. It is difficult to clean the incubator after it is polluted by the oil spill, and the pollution can be completely eliminated only by replacement, which is very expensive. Once oil sticks to the gills of fish, it will suffocate them. The oil contains a toxic substance of polycyclic aromatic hydrocarbons, which is not easy to dissolve in water, but can be dissolved in fat. After the fat in economic fish, shellfish and other marine organisms adsorbs such toxic substances, human health will be directly threatened by "carcinogenesis"

at present, some workers cleaning up oil pollution at the oil spill site in the Gulf of Mexico have developed cold like symptoms, including headache, chest tightness and nausea. Some experts found that the degradation rate of polycyclic aromatic hydrocarbons is very slow, and it usually takes 10 years to degrade about 50%, which also shows that the damage of toxic substances to human living environment is a longer effect. Some psychiatrists who specialize in the impact of environmental and natural disasters on the human spirit believe that local residents in the Gulf of Mexico have been under great mental pressure in the oil spill that lasted nearly three months. Many adults and their children are worried that they will always live in a toxic environment

in addition, the pollution threat of the leaked crude oil to the coastline beach will directly affect the tourism industry relying on the beach and beach. In march2009, WWF published a research report. After continuous research on a crude oil spill on march23,1989, they found that 20 years later, the coast of Alaska, where the disaster occurred, was still covered with a large amount of oil. The harm caused by residual oil is beyond anyone's imagination. The oil-water mixture was immersed 25 centimeters underground, and even on February 6, 2009, it penetrated the island of Elliot in Prince William Sound, Alaska. At the time of the oil spill, experts mistakenly predicted that oil would disappear automatically in the next few years. On the contrary, the oil has spread slowly, the oil covered coast has been isolated, and the water area has been polluted by residual oil and oil eating bacteria. All these will become the lagging impact of the oil spill accident on human beings

in Ma Yongan's opinion, although the sea water itself has a certain self purification capacity, if it is a small amount of oil leakage, it can be dissolved by itself after more than ten days. However, the large-scale oil spill in the Gulf of Mexico has far exceeded the self purification capacity of seawater, and its impact on local marine ecology may take at least more than ten years to eliminate. "Shortly after the oil spill, BP sent a call for opinions to scientists all over the world to jointly save the sea polluted by crude oil. The company has received more than 4800 governance suggestions, and its mouse operated virtual buttons are also looking for technically feasible solutions. We also hope to provide them with more suggestions."

in addition to collecting the leaked crude oil, it is very difficult to remove the crude oil pollution in the water body. The only choice to prevent oil and water from being combined is to spray scavengers, because only under the action of chemical agents can the crude oil be decomposed rapidly to form tiny globules that can be dissipated in the water. However, spraying chemicals may also cause further pollution to the water body. There are also some physical methods to remove oil pollution on the water surface, such as using a suction machine to absorb oil, using a water grid and skimmer to scrape oil, using oil cables to block the diffusion of oil, and so on

a British farmer once invented a method to control oil pollution with machine-made grass rows, which can not only prevent oil from spreading in the sea, but also absorb oil 15 times more than its own mass. Among grasses, barley straw is the most effective. In 1992, after an oil tanker crashed near the Shetland Islands, relevant personnel placed a 22 kilometer long grass row at sea, thus protecting the bathing beach and fishing ground from pollution

biological treatment should be adopted for the collected sewage. Various microorganisms in nature are used to degrade the organic matter in wastewater to achieve the purpose of wastewater purification

according to zhengbinghui, vice president and researcher of the Chinese Academy of Environmental Sciences, the US Gulf of Mexico oil spill has also reminded China

China is the second largest oil importer in the world and the largest in Asia. 90% of the imported oil is transported by sea. Under this premise, various oil spills at sea in China also occur frequently, about 500 times a year. At present, the relevant departments have found that the oil content of seawater in China's coastal areas has exceeded the national seawater quality standard by two to eight times, and the marine oil pollution is very serious. At the same time of the oil spill in the Gulf of Mexico in the United States, the crude oil pipeline from Dongying to Huangdao in China also had a crude oil leak in Jiaozhou. It was precisely because of local illegal construction that excavator drivers excavated above the pipeline without authorization to bury construction waste, and went deep into the lithium battery industry Yongxing Special Steel subsidiary's proposed lithium battery new energy material project, resulting in a large number of crude oil leaks

baoxianwen, School of environment, Ocean University of China, also told that, in fact, there are thousands of oil wells in the Bohai Bay of China. Oil leakage accidents also occur from time to time. Generally, China will delimit the sea area for project development and arrange an oil interceptor. These polluted seawater usually does not return to the sea, but is discharged to a fixed location through pipelines or artificial recovery. The testing department will also regularly measure the oil content of seawater, silt, fish and shellfish in the surrounding sea areas. According to the national sea water quality standard, the oil content in the fishing waters, aquaculture areas and other water areas that are in direct contact with human body or even directly related to human consumption shall not be higher than 0.05 mg/L, while the oil content in the sea water of industrial water areas and scenic spots shall not be higher than 0.30 mg/L, and the oil content in the waters of marine development and operation areas shall not be higher than 0.50 mg/L

Li Yan, a researcher at the American Institute of the Chinese Academy of modern international relations, believes that the oil spill in the Gulf of Mexico has highlighted the vulnerability of marine ecology and the importance of coordinating marine development and governance. "At present, all kinds of marine development in China are accelerating, marine exploitation activities are becoming more and more frequent, marine energy transportation is becoming more and more active, and the probability of marine pollution events is also increasing. However, at present, China's awareness of marine protection lags far behind the process of marine development. In practical work, there is a widespread problem of paying more attention to development than protection, and paying more attention to the immediate and less attention to the long-term."

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