Is ozone pollution on the rise year by year?

According to reports, from June 4th to 15th, ozone was the primary pollutant in China's Yangtze River Delta, South China, Northwest and Northeast regions, and China's ozone pollution was on the rise year by year.

According to the report, according to the ozone monitoring results released by the Ministry of Ecology and Environment at a regular press conference in May, in 2017, the average concentration of ozone in the ambient air of 338 cities in China was 149 microgram cubic meters, an increase of 8% year-on-year, an increase from 2015. From 2015 to 2017, the proportion of days exceeding the standard with ozone as the primary pollutant in 338 cities was .

4%, which is increasing year by year.

Ozone pollution presents the characteristics of continuous and regional pollution, mainly concentrated in the central and southern parts of Liaoning, Beijing-Tianjin-Hebei and its surroundings, the Yangtze River Delta, Wuhan urban agglomeration, the Guanzhong region of Shaanxi, Chengdu-Chongqing and the Pearl River Delta region.

Experts say ozone is a strong oxidizing agent, not only harmful in itself, but its atmospheric mass concentration also reflects the atmospheric oxidizing capacity, that is, the ability to produce secondary pollutants. Therefore, in order to control or reduce ozone pollution and atmospheric oxidation in the atmosphere, it is necessary to simultaneously reduce the emission of nitrogen oxides and VOCs, so as to achieve coordinated control of pollutants.

The strong oxidizing effect of ozone on biological tissues is obvious, and the leaves of plants and the respiratory tract of people will be damaged.

Hello: I am glad to answer for you with the health grade negative ions, because ozone is a very unstable gas, which can be decomposed into oxygen at room temperature and its reaction formula is: 2O3 302+285KJ.

After stopping the use of the ozone function, the ozone can be reduced from 3 oxygen to no oxygen after 15-20 minutes of ventilation, and the normal gas in the space can be restored.

So as long as this law is followed, there will be no human cause.

Car exhaust, ozone generators, arcs.

Nitrogen dioxide and ozone are not pollutants that form haze; Nitrogen dioxide is the main pollutant that causes the destruction of the ozone layer, and it is also the second pollutant after sulfur dioxide to form acid rain. Ozone does not produce smog; The pollutants that form haze are mainly particulate matter, including PM10.

Ozone is heavily polluted in late spring and summer.

Seasonal periods of ozone pollution are usually high in late spring, summer and early autumn when the sun is shining, and the weather conditions are hot. This is because three conditions are required for ozone pollution to form: air temperatures above 20°C, adequate water vapor and light.

Under these conditions, nitrogen oxides and volatile organic compounds accumulate to higher concentrations through light and temperature, resulting in ozone pollution.

In addition, there is a shortage of abundant sunlight, high temperatures, and low humidity in summer, which are conducive to the formation and accumulation of ozone. In late spring and autumn, the temperature gradually increases, the rainfall decreases, and the humidity in the air increases, which also favors the formation and accumulation of ozone.

As a result, ozone pollution is usually most severe in late spring and summer, and gradually lessens in autumn. However, the specific seasonal high incidence period needs to be comprehensively analyzed in combination with local meteorological conditions and environmental characteristics.

Ozone Pollution Prevention:

The first source of oxygen is divided into natural sources and man-made sources. Natural sources of ozone mainly refer to the downward transport of the stratosphere. In 1962, Junge believed that under the radiation conditions of ultraviolet rays with a wavelength of less than 240nm, the ozone in the stratosphere will decompose, and the oxygen atoms produced will combine with oxygen molecules to produce ozone shutout, and the stratospheric ozone will be transported down to the troposphere and become the source of ozone in the troposphere.

Anthropogenic ozone is mainly produced by the photochemical reaction of pollutants such as NOx and VOCs. On sunny days and under the condition of strong ultraviolet radiation, NO2 and other photolysis undergo photolysis to form nitric oxide and oxygen atoms, and oxygen atoms react with oxygen to form ozone.

Summary. Hello dear! It's the worst in summer.

Hello dear! It's the worst in summer.

The worst ozone pollution in the season and afternoon generally begins in April and lasts until October, with the highest concentrations in June and August. On a day-to-day basis, ozone concentrations increased with increasing sunshine, peaking at around 1 p.m., continuing to be high at 2 to 3 p.m., and gradually decreasing at around 5 p.m. as solar radiation weakened. This is because the summer weather is more suitable for the generation of photochemical pollution, the air is high in temperature, ultraviolet rays are strong, and the pollutants emitted by motor vehicles contain a large number of nitrogen oxides and volatile organic compounds, and they will undergo a series of reactions under the irradiation of sunlight to generate ozone bonds.

How can I protect and reduce the damage? Ozone in the atmosphere is not easy to control, and the most effective way to reduce its harm to the human body is to reduce going out in the summer afternoon and try not to open the windows.

Indoors, ozone cannot be produced continuously because of the lack of sunlight needed to generate it. On the one hand, ozone can react with organic compounds containing unsaturated carbon-carbon bonds, such as rubber, styrene and unsaturated fatty acids, and can quickly disappear. However, except in the office where there is a laser field sensitive printer, because the laser printer contains ultraviolet light source, which can ionize strong light to produce ozone, it is recommended to place it in a ventilated place.

For sensitive groups who must go out, such as asthma patients, wearing a mask can have a certain filtering effect on ozone.