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author：EBICO 2019-10-24
Nitrogen pollution from farms, transport, industry and waste disposal could cost the eu up to ￡280bn a year.
Studies by 200 eu experts also revealed that reactive nitrogen causes air pollution, accelerates climate change and shorted the average six-month life expectancy.
Industry and waste disposal are among the main causes of nitrogen pollution.
NO is a colorless odorless gas, strong affinity with hemoglobin, destroy the hemoglobin in the blood, can cause hypoxia, paralysis, spasm and other symptoms.
| Concentration of NO2 (PPM) | The degree of impact on the human body |
| 0.06~0.1 | It had no effect on non-smoking healthy people |
| 0.14~0.3 | People with mild respiratory symptoms increased, with no effect on lung function |
| 0.15~0.5 | The number of patients with respiratory diseases increased, with mild pulmonary dysfunction, 0.5 PPM continuous exposure for 4h, pulmonary cell pathological changes.Continuous 3-12 months, that is, emphysema, infection resistance is weakened |
| >0.5 | The prevalence of bronchitis increased slightly |
| 0.7~2 | Breathing was difficult for 20 minutes |
| 2.4~2.5 | Emphysema and chronic bronchitis can occur after long - term exposure of 3-5 years |
| 4~5 | Lung function decreased after 15 minutes of exposure |
| 10~15 | Eye, nose and respiratory irritation |
| 16.9 | Exposure for 10 minutes causes dyspnea and bronchospasm |
| 50 | Within 1min, people's breathing is abnormal and their nose is stimulated |
| 80 | Chest pain within 3-5min |
| 90~100 | Three hours of exposure can kill |
| 100~150 | People die of emphysema within 30 minutes to 1 hour |
NO2 is reddish brown and soluble in water. When people breathe, NO2 will reach the lungs and cause respiratory system diseases. Under the action of ultraviolet light, it will combine with hydrocarbons and form photochemical smog, which will cause emphysema, asthma, bronchitis and other diseases.
Unlike SO2, which can be perceived immediately by the human body, NO2 is accumulated slowly and unknowingly, and its harm is subtle and lasting.In particular, more than 800 people died in the Los Angeles photochemical smog of the 1940s and 1950s.In this case, the u. s. government investigation indicated that the cause was photochemical reaction.What is photochemical reaction?Photochemical reactions, known as petroleum volatilizes (hydrocarbons) and nitrogen dioxide, produce a pungent organic compound under intense ultraviolet light from the sun. The product is highly toxic photochemical smog.
The harm of NO2 is not only in the United States, but also in China. In the special research center of China's beijing-tianjin wing haze weather, the special team detected a large number of nitrogen-containing organic particles, which was "the most dangerous signal", because it was "one of the main components of photochemical smog in Los Angeles in the last century".
On September 17, 2018, China launched the world's most stringent ever combustion emissions standards GB/T36699-2018, at the same time, local governments have introduced a more strict standards than national standards, the survival of humans to space provides clean air security, ensure the health of body and mind and burner emissions level 2 o 'clock especially NOx emissions of the harm of headband top up the air, so the utilization of low nitrogen combustion equipment are inevitable.