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【Hot attention from Chemical Machinery and Equipment Network ] In 2013, “smog” became the key word of the year.
In January of this year, 4 haze processes covered 30 provinces (autonomous regions and municipalities).
In Beijing, only 5 days were not haze.
According to reports, less than 1% of China’s largest 500 cities meet the World Health Organization* air quality standards.
In addition to increasing the risk of a recurrence of the epidemic due to increasingly cold weather, in India, the air may also deteriorate.
Will soon lead to a worsening of the epidemic.
Hot attention of Chemical Machinery Equipment NetworkChemical machinery and equipmentIn January of this year, 4 haze processes covered 30 provinces (autonomous regions and municipalities).
In Beijing, only 5 days were not haze.
According to reports, less than 1% of China’s largest 500 cities meet the World Health Organization* air quality standards.
In addition to increasing the risk of a recurrence of the epidemic due to increasingly cold weather, in India, the air may also deteriorate.
Will soon lead to a worsening of the epidemic.
On Monday, New Delhi announced a series of plans to reduce the annual toxic smog in New Delhi.
The authorities warned that severe pollution may exacerbate the spread of the new coronavirus.
Every winter, the air in this metropolis of 20 million people becomes a toxic mixture of dust and smoke, which is caused by car exhaust, industrial emissions, and smoke from agricultural combustion.
Smog often makes this city one of the most polluted cities in the world.
The authorities warned that severe pollution may exacerbate the spread of the new coronavirus.
Every winter, the air in this metropolis of 20 million people becomes a toxic mixture of dust and smoke, which is caused by car exhaust, industrial emissions, and smoke from agricultural combustion.
Smog often makes this city one of the most polluted cities in the world.
Is the smog coming again? you knowDetector is what you?
Is the smog coming again? you knowDetector is what you? Detector
Smog is the result of the interaction between specific climatic conditions and human activities.
The economic and social activities of a high-density population will inevitably emit a large amount of fine particulate matter (PM 2.
5).
Once the emission exceeds the atmospheric circulation capacity and carrying capacity, the concentration of fine particulate matter will continue to accumulate.
The range of smog.
The economic and social activities of a high-density population will inevitably emit a large amount of fine particulate matter (PM 2.
5).
Once the emission exceeds the atmospheric circulation capacity and carrying capacity, the concentration of fine particulate matter will continue to accumulate.
The range of smog.
Air pollution (smog)The monitoring instrument city uses the principle that the amount of X-rays absorbed by dust particles is proportional to the quality of dust particles, and measures the changes in the intensity of X-rays before and after passing through blank filter paper and dust-containing filter paper to measure TSP, PM10 or PM2.
5, PM0.
3.
The concentration value.
The accuracy of the measuring instrument is verified by comparison and calibration with the standard filter weighing method.
Monitoring instrument 5, PM0.
3.
The concentration value.
The accuracy of the measuring instrument is verified by comparison and calibration with the standard filter weighing method.
At the same time, the laser scattering principle is used to measure the instantaneous value of the particle concentration (minute data), and the data measured by the X-ray absorption method is used to calibrate the data measured by the light scattering method, so that the two complement each other and detect the type of particulate matter in the atmosphere.
And the exact value of the magnitude.
And the exact value of the magnitude.
In addition, lidar is also the most technical means to detect smog.
In recent years, my country’s new “haze detection” lidar developed by the Hefei Institute of Material Science of the Chinese Academy of Sciences can monitor and analyze the distribution of smog from the ground to an altitude of 10 kilometers in real time.
Its composition has been observed in the Beijing-Tianjin-Hebei, Yangtze River Delta, Sichuan-Chongqing and other regions in China.
However, the "backscattering" technical scheme adopted by this new type of radar has "blind spots" in near-ground detection, and the detection effect of haze within a range of 500 meters needs to be further improved.
In recent years, my country’s new “haze detection” lidar developed by the Hefei Institute of Material Science of the Chinese Academy of Sciences can monitor and analyze the distribution of smog from the ground to an altitude of 10 kilometers in real time.
Its composition has been observed in the Beijing-Tianjin-Hebei, Yangtze River Delta, Sichuan-Chongqing and other regions in China.
However, the "backscattering" technical scheme adopted by this new type of radar has "blind spots" in near-ground detection, and the detection effect of haze within a range of 500 meters needs to be further improved.
Various analytical instruments such as nitrogen oxide detectors, PM2.
5 detectors and VOCs monitoring instruments can also be used for real-time dynamic monitoring of pollution sources.
At the same time, increase investment in scientific research, promote the development of clean, low-polluting industrial manufacturing and pollutant treatment processes, and formulate reasonable monitoring and treatment plans through the investigation of the concentration, generation and migration of pollutants.
5 detectors and VOCs monitoring instruments can also be used for real-time dynamic monitoring of pollution sources.
At the same time, increase investment in scientific research, promote the development of clean, low-polluting industrial manufacturing and pollutant treatment processes, and formulate reasonable monitoring and treatment plans through the investigation of the concentration, generation and migration of pollutants.
Original title: Is the smog coming again? What are the testing equipment?
