Serious environmental pollution incidents in China in recent years.

Major water pollution incident in Songhua River (when? 2005 165438+ 10/3)

An explosion occurred in the aniline workshop of Shuangbenzene Plant of China Petroleum Jilin Petrochemical Company. About 100 tons of organic pollutants such as benzene, aniline and nitrobenzene produced by the accident flowed into Songhua River. Benzene pollutants are harmful to human health, leading to major water pollution incidents in Songhua River. The Harbin Municipal Government immediately decided to close the water intake of the Songhua River in Harbin 165438 from 0: 00 on October 23rd, and stop supplying water to the urban area. Supermarkets in Harbin snapped up drinking water without exception.

2. The dead fish incident in Baiyangdian, Hebei (when? February and March 2006)

In February and March of 2006, a large area of dead fish appeared in Baiyangdian Lake, the largest freshwater lake in North China, which is known as the "Pearl of North China". The investigation results show that the main cause of fish death is serious water pollution and low dissolved oxygen in the water, which eventually leads to fish suffocation and death.

3. Taihu Lake Water Pollution Incident (May 2007)

The municipal government said it was caused by persistent high fever, and the State Environmental Protection Administration thought it was both a natural disaster and a man-made disaster. It is generally believed that the government has built a large number of chemical plants with serious pollution emissions for economic performance, but the poor pollution control in Taihu Lake has caused today's vicious incidents, and the government's fraud has made the pollution problem in Taihu Lake increasingly serious. Studies have shown that the water pollution incident in Wuxi is mainly due to the accumulation of cyanobacteria near the water source, and a large number of malodorous substances such as NH3, mercaptan, sulfide and hydrogen sulfide are produced during anaerobic decomposition.

4. Cyanobacteria outbreak in Chaohu Lake and Dianchi Lake (? Time? June 2007)

Cyanobacteria also appear in Chaohu Lake and Dianchi Lake to varying degrees. A large area of cyanobacteria with an area of about 5 square kilometers appears in the western half of Chaohu Lake in Anhui Province. Because the western half lake is not used as a drinking water source, it has little impact on the local area. However, with the continuous high temperature, cyanobacteria also appeared in the eastern half of Chaohu Lake. Dianchi Lake is also sweltering for several days, and cyanobacteria multiply in large numbers. On the bank of the ridge line of Dianchi Lake in Kunming, the lake is like green paint, accompanied by a stench. The continuous outbreak of cyanobacteria in Taihu Lake, Chaohu Lake and Dianchi Lake has sounded the alarm for the comprehensive management of water pollution in the "three lakes" basin.

5. The arsenic pollution incident in Yangzonghai, Yunnan (when? June 2008)

In June 2008, the environmental protection department immediately launched an investigation after discovering the abnormal arsenic content in Yangzong sea water. When it was found that the arsenic content in Yangzonghai water exceeded the standard content of drinking water by 0. 1 time, it was immediately required to stop using Yangzonghai as a drinking water source.

6. cadmium pollution incident in Longjiang, Guangxi (time? 20 12 years 15 years1October 65438)

201265438+1October 15 A small number of dead fish appeared in cage fish culture in Lalang Hydropower Station, Longjiang River, Guangxi, which was exposed by network. Heavy metals in the water in front of the wharf in Lalang Township, Yizhou City, Longjiang River exceeded the standard by 80 times. At that time, it was the Spring Festival in the Year of the Loong, and the content of heavy metal cadmium in Longjiang reach exceeded the standard, which seriously threatened the drinking water safety of coastal and downstream residents. The local government actively carries out pollution control to minimize the impact on people's lives.

Due to people's insufficient expectation of the negative impact of highly developed industries and unfavorable prevention, three global crises have resulted: resource shortage, environmental pollution and ecological destruction. Environmental pollution refers to natural or man-made destruction, adding certain substances to the environment, which exceeds the self-purification ability of the environment and causes harm. (or due to human factors, the environment is polluted by harmful substances, which adversely affects the growth and reproduction of organisms and the normal life of human beings. Due to human factors, the composition or state of the environment changes, and the quality of the environment declines, thus disturbing and destroying the ecosystem and the normal production and living conditions of human beings.

References:

Baidu Encyclopedia of Environmental Pollution