PM2 5 Survey Report 10

Refers to particulate matter in the atmosphere that is less than or equal to a micron in diameter, also known as particulate matter that can enter the lungs. Its diameter is less than 1 20 of the thickness of a human hair. Although it is only a small component of the Earth's atmosphere, it has important implications for air quality and visibility.

Compared with coarser atmospheric particulate matter, the particle size is small, rich in a large number of toxic and harmful substances, and the residence time in the atmosphere is long, and the transportation distance is long, so it has a greater impact on human health and atmospheric environmental quality. On December 5, 2011, the "Ambient Air Quality Standard" (second draft for comments) was closed for public comment, and the new standard is planned to be fully implemented in 2016. The Beijing-Tianjin-Hebei region, the Yangtze River Delta, and the Pearl River Delta, as well as nine urban agglomerations, may be required to monitor and publish data in advance.

Concept: PM, which stands for particulate matter. Scientists use this to indicate the amount of such particles per cubic meter of air, and the higher this value, the more severe the air pollution.

Respirable particulate matter and total suspended particulate matter in urban air quality** or weekly reports are two of the most familiar air pollutants.

Inhalable particulate matter, also known as PM10, refers to particulate matter with a diameter greater than microns, equal to or less than 10 microns, which can enter the human respiratory system; Total suspended particulate matter is also known as PM100, i.e. particulate matter with a diameter of 100 microns or less.

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2012-6-23 19:38 Enthusiastic netizens.

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2. But the main thing is man-made emissions. Humans emit both direct and certain gaseous pollutants that are converted into air. Direct emissions mainly come from combustion processes, such as the combustion of fossil fuels (coal, gasoline, diesel), the combustion of biomass (straw, firewood), and waste incineration.

The gaseous pollutants converted into the air mainly include sulfur dioxide, nitrogen oxides, ammonia, and volatile organic compounds. Other man-made ** includes: road dust, construction dust, industrial dust, kitchen smoke.

3. The ** is complex, and the ingredients are naturally very complex. The main components are elemental carbon, organic carbon compounds, sulfates, nitrates, ammonium salts. Other common components include a variety of metallic elements, including sodium, magnesium, calcium, aluminum, iron and other elements rich in the crust, as well as lead, zinc, arsenic, cadmium, copper and other heavy metal elements that are mainly derived from human pollution.

Air quality.

Hello, refers to the quality of dust, that is, the diameter of less than or equal to microns of inhalable particulate matter, mainly from automobile exhaust, industrial exhaust, unconventional combustion, volcanic eruptions and other ** emission of fine particulate matter, is one of the main components of air pollution, its harm can be divided into long-term exposure will lead to respiratory tract lesions, allergic symptoms aggravation and other pathogenic risks, short-term exposure will cause breathlessness, lung pain and other symptoms. The main monitoring pollutants are: Zhengsui is an industrial pollution source, such as coal burning, oil smoke, etc.

The second is the source of traffic emission pollution, such as car exhaust and exhaust gas released by trains. The third is the natural pollution sources in various regions, such as sandstorms, proteins, etc.

In addition, in order to improve the quality of the environment, effective measures should be taken, including starting economic transformation, establishing an advanced environmental pollution prevention and control mechanism, improving the transportation system, strengthening air pollution control, changing people's consumption patterns, and planting trees and a series of measures. All regions should also control pollution sources and gradually reduce emissions to achieve the goal of safe discharge. I hope I can help you and I wish you a happy life!

Air quality.

It refers to particulate matter in the air with a diameter of less than or equal to microns, which has strong penetrating power and accumulation, and can enter the human respiratory system and cause health hazards. According to the World Health Organization (WHO) standard, locust concentrations below 100 micrograms per cubic meter are considered good air quality; And when the concentration exceeds 35 micrograms per cubic meter, it is considered mildly polluted; When the concentration exceeds 75 micrograms per cubic meter, it is considered moderately polluted; When the concentration exceeds 115 micrograms per cubic meter, it is considered heavily polluted. In order to protect people's health, many cities have adopted a series of measures to reduce air pollution, such as restricting vehicle traffic, shutting down high-polluting businesses, and promoting clean energy.

In addition, people can also take some personal measures to reduce the time and intensity of their exposure to air pollution, such as wearing masks, opening windows for ventilation, reducing outdoor activities, etc.

Air quality.

Hello dear, refers to particulate matter in the air with a diameter of less than or equal to microns, which is a pollutant in the air. These fine particles can enter a person's lungs and pose a health hazard. Depending on the concentration in the air, the air quality is classified into different grades.

Here's what you need to know about air quality: Air Quality Index (AQI): An AQI is a measure of air quality that takes into account the concentration of a variety of pollutants in the air.

The AQI ranges from 0 to 500, with higher values indicating worse air quality. An AQI between 0 and 50 is considered a good sock size, 51 and 100 is considered moderate, 101 and 150 is considered unhealthy for sensitive people, 151 and 200 is considered unhealthy, 201 and 300 is considered very unhealthy, and 301 and 500 is considered dangerous. Concentration:

Concentration refers to the concentration of particulate matter in the air and is measured in micro-jacket cubic meters. Depending on the concentration, the air quality is classified into different grades. In China, for example, concentrations are graded as excellent, good, lightly polluted, moderately polluted, severely polluted, and severely polluted.

Overall, it is a pollutant that is harmful to health, and the air quality index and concentration are two important indicators of air quality. People can know what the air quality is doing by the air quality index or concentration and take appropriate measures to protect their health. I'm glad to answer for you, and I hope I can help you.

If my answer is helpful to you, please give a like, look forward to your like, your efforts are very important to me, and your support is also the motivation for my progress. Best wishes again good health and a good mood!

Summary. Air quality, 25 level 1 (excellent).

Air quality. Air quality, 25 level 1 (excellent).

The standard value specified in the relevant documents of our country is a 24-hour average concentration of less than 75 micrograms of cubic meters of buried high meters and high dust in China's 24-hour average standard value: excellent: 0-50;Liang:

50-100；Light pollution: 100-150; Moderate pollution: 150-200; Heavy Pollution:

200-300；Severe pollution: greater than 300 and above.

It's just that this value is only in my country to meet the standard, but if it is not Qingru but if it is stupid, it is compared with the international standards stipulated by the country, there is a certain difference, and it only meets the most dry and wide standard set by the WHO.

The standard value is a 24-hour average concentration of less than 75 micrograms cubic meters.

China's 24-hour standard value is excellent: 0-50; Good: 50-100; Light pollution: 100-150; Moderate pollution: 150-200; Heavy pollution: 200-300; Severe pollution: greater than 300 and above.

The standard was proposed by the United States in 1997, mainly to more effectively monitor the small particulate matter that appeared with the increasing development of industrialization and was ignored in the old standard. The index has become an important indicator for measuring and controlling the level of air pollution.

of the protection method

1. You can use an air purifier

Although the purifier has an exaggerated role in publicity, its role in purifying the air is still undoubted, and when the air is bad, you can use the purifier at home to help purify the toxic substances in the air, clean the air and improve the breathing environment.

2. Properly open windows for ventilation

Dry weather makes germs easy to gather, whether it is a large stall in the air or some indoor toxic air, such as formaldehyde, polyethylene, second-hand smoke, etc. on the pure wall, etc., all of which are very harmful to the body. It is necessary to choose a good weather when the pants are erected and properly open the window for ventilation to make the indoor air circulation and avoid a large number of bacteria from accumulating.

3. You can raise green plants at home

The choice of green plants in the living room is also very crucial, some green can effectively adsorb indoor toxic gases, and play a certain role in the treatment of indoor polluted air. Spider plant, aloe vera, agave, yueji, tiger tail orchid and other plants can not only beautify the environment, but also play a role in purifying the air and increasing the amount of oxygen.

1. Definition: refers to particulate matter with an aerodynamic equivalent diameter of less than or equal to microns in ambient air, also known as fine particulate matter and particulate matter that can enter the lungs.

2. Characteristics: Its diameter is less than 1 20 of the thickness of human hair, and it can suspend lead in the air for a long time, and the higher its content (concentration) in the air, the more serious the air pollution. Although it is only a small component of the Earth's atmosphere, it has important effects on air quality and visibility.

The particle size is small, the specific surface area is large, the activity is strong, it is easy to carry toxic and harmful substances (such as heavy metals, microorganisms, etc.), and the front rock has a long residence time in the atmosphere and a long transportation distance, so it has a greater impact on human health and atmospheric environmental quality.

2. PM10

1. Definition: PM10 is an inhalable particulate matter with an aerodynamic equivalent diameter of less than or equal to 10 microns, which refers to the general term for solid and liquid particulate matter floating in the air.

2. Features: PM10 can enter the upper respiratory tract, but some of it can be excreted through sputum, etc., and it will also be blocked by the villi inside the nasal cavity.

Nowadays, people are very concerned about environmental protection, especially the indoor environment, if the air is not circulated and fresh, the human body will feel uncomfortable, especially if there are children and the elderly, the immunity is low, so we should pay special attention. As inhalable particulate matter, it is not only found outdoors, but also indoors if you are not careful, it will also exceed the standard. So how did it come about?

Primary Emission Sources (Direct Emissions) Primary emission sources can be divided into natural emission sources and anthropogenic emission sources. Natural sources of emissions include wind dust, volcanic ash, forest fires, wave droplets, biological sources, etc. Anthropogenic emission sources include industrial dust, motor vehicle exhaust particulate matter, road dust, construction dust, kitchen fumes, etc.

Secondary (secondary generation) refers to the secondary fine particulate matter produced by gaseous pollutants emitted into the atmosphere through a variety of chemical and physical processes. A large number of gaseous pollutants emitted by human activities, such as sulfur dioxide SO2, nitrogen oxide NOx, ammonia NH3, volatile organic pollutants (VOCs), etc., can be oxidized in the atmosphere to form sulfates, nitrates, ammonium salts, and secondary organic aerosols (SOAs). These newly produced fine particulate matter are important in the atmosphere**.

From a global perspective, the contribution rate of secondary particulate matter is between 20% and 80%, and the central and eastern regions of China are often as high as 60%, and the proportion of secondary particulate matter is often higher when haze is formed.

1.Smoking indoors If you smoke two cigarettes in a 15-square-meter room, the concentration will be **. Secondhand smoke and third-hand smoke in the room is an important factor.

As long as there are smokers, it will be higher than outdoors at this time. If the whole air circulation system is common throughout the building, and there are many smoking rooms, then it will be very high in the whole large circulation.

2. Kitchen fumes, frying and barbecue are all carried out indoors. If you don't pay attention to ventilation and don't buy, install, use and maintain range hoods scientifically, the fume pollution in the kitchen will definitely be higher than that of office facilities. Secondly, the kitchen itself also needs fuel, which is important for indoor air pollution**.

At the same time, it will also depend on the difference in the ignition point of the edible oil. Some residents also prefer to use the oil twice, which makes the oil have a higher ignition point.

3.Home Improvement We are now using stone more and more for decoration. In addition to the bathroom, almost 20% of the living room, bedroom and kitchen are occupied by stone. Among them, there is also radon pollution and the pollution of the stone itself, both of which are carcinogens.

Furniture is usually painted several times, first with varnish, then with lacquer, then with glue. This furniture combination, while it looks good, has an adhesive with benzene and formaldehyde as the main components at each seam. Some families also have floor glue, wallpaper, and floor leather.

These are a large number of chemical materials and are also an important part of indoor VOCs and volatile gases. These are also indoors.

Generally, an air purifier of 2 can reach the standard. When it reaches 5, it means that the level is very high. It is a substance that floats in the air.

It is small in size and can enter the lungs of a person and affect human health. Therefore, we must take appropriate measures to prevent it.