China’s automatic pollution source monitoring system has continued to improve since its establishment in 1991. Its data capture and application capabilities have also made great strides. According to data released by the Ministry of Ecology and Environment in 2022, there are now 16,980 fixed ambient air stations nationwide and 48,000 monitoring points for key units. It’s clear that an off-site monitoring system with automatic monitoring data as the core has taken shape.
With the carbon peaking and carbon neutrality goals and the “14th Five-Year Plan“ arrival, eco-environmental business development accelerates again. Complex pollution becomes the main problem with ultrafine particles and ozone as the main characteristics. Accordingly, atmospheric monitoring indicators and tasks have also undergone significant changes. Broad, generalized data can no longer meet the needs so the monitoring mode has to change from “wide cast” to “fine fishing”. Palas® draws its experience from Europe and is committed to contributing to atmospheric monitoring in China.
At an important inflection point, Palas® gathered Nan Wang, Deputy Director of Shenyang Ecological and Environmental Monitoring Center in Liaoning Province, and Ling Jiang, Researcher at Dalian Institute of Chemical Physics, Chinese Academy of Sciences, to present an online webinar. It’s an in-depth analysis of the technical characteristics of Palas® particle size spectrometer. It is a webinar with both professional opinion and comprehensibility!
Application of particle size spectrometry in atmospheric monitoring
Speaker: Nan Wang, Master, Senior Engineer, graduated from Tianjin University, majoring in chemical process, Deputy Director of Shenyang Ecological and Environmental Monitoring Centre in Liaoning Province, working in the fields of air quality prediction and VOCs monitoring and analysis.
The transition from a single type to a composite type constitutes a remarkable phase of China’s atmospheric environment. To meet the increasingly refined demand Shenyang municipal government has planned and built a three-dimensional monitoring superstation. In addition to conventional air quality evaluation indicators, this superstation extends to meteorological factors, physical and chemical components of atmospheric particulates, and vertical monitoring,
“By aggregating and analyzing the annual particle monitoring values, we can find the main periods and key areas. Then we can analyze them in conjunction with particle characteristics to trace the main causes and apply the targeted treatment.” Nan Wang said, there is a huge monitoring database to support. And it is more clear that there are relationships among particle pollution levels, mass concentration and meteorological conditions.
When it comes to continuous online monitoring in real-time, Nan Wang notices the Fidas® range of products. With 256 raw data channels, the Fidas® can measure PM1, PM2.5, PM4, PM10, TSP, etc. Fidas® uses the light scattering principle to measure the number and size of particles with greater continuity and resolution. The certified Fidas® devices cover the measurement range from 0.18 μm to 18 μm.
As scientific research into the atmosphere becomes more advanced, the numerical accuracy requirements will be further increased. And monitoring instruments will become increasingly important as a means of obtaining real-time data. The results will also contribute to the development of particle control and help China’s air pollution prevention.
Functions and applications of Scanning electric mobility particle size spectrometer: from laboratory studies to field observations
Speaker: Ling Jiang, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Research Fellow, recipient of the National Outstanding Young Scientist Fund.
it is urgent to carry out treatment work because aerosols can have a serious impact on human health. Ling Jiang pointed out that to effectively combat aerosol-type pollution, it is important to have a clear picture of the situation. And monitoring equipment is essential to obtain the chemical properties, conversion mechanisms, and precipitation pathways. Palas® SMPS can meet this need, with a wide measurement range of 4-1200 nm to help achieve highly sensitive, high-resolution nanoparticle size measurements.
SMPS is based on the fundamental characteristic that particulate matter “is separately induced into monodisperse aerosols based on the difference in electric mobility in different mobility analyzer”.
In the laboratory, SMPS can assist with “SOA production rates and growth rates from biogenic and anthropogenic precursors”, “the effect of NOx, SO2 and humidity on SOA production rates”, “the effect of human habitation ( Printers, skin, disinfectants) on indoor SOA” and provide accurate data. Outdoors, SMPS can be used to observe aerosol particle size distribution in cities, suburbs, coastal areas, rainforests, etc. It can fill the gap in related research and form a comprehensive data system. And it can promote environmental management of the atmosphere.
Topic: Palas® particle size spectrometer for particulate walk-away monitoring
Speaker: Zhongde Xu, Palas® China Sales Manager for the environmental and automotive industries.
To help the construction of a unified national monitoring network, various places have increased the layout of environmental air detection stations. The “rush to install” is nearing the end, and the eastern and southern areas basically achieved enough sites. But it is undeniable that, in the face of China’s big population, monitoring power is still insufficient. Moreover, the scope of fixed stations is often limited, which is conducive to the formation of medium and long-term control quality trend reports. But there are lags behind in the response to episodic pollution events.
As a result, mobile navigation detection has been used as an important supplement to daily air quality monitoring. And it is also an important means of ecological law enforcement monitoring. In practical use, the authorities can quickly grasp the distribution and component characteristics of air pollutants through aerial monitoring. Then they can accurately trace the source of pollution and form effective real-time monitoring data.
More convenient, more accurate equipment is undoubtedly the key for navigation monitoring. Palas® expert Zhongde Xu introduced that Palas® particle size spectrometer has a good performance in many places. Palas® Scanning electric mobility particle size spectrometer (SMPS) can measure PM1, PM2.5, PM4 and PM10 at the same time to obtain their distribution and changes. This simplifies the process and reduces manual operations. In a case study in Shanghai, the partner equipped a walk-around monitoring vehicle with Palas® monitoring equipment. In the end, they successfully identified pollution patterns and then continued their study.
Palas® particle size spectrometer owes its precision measurements to its key technology, T-aperture technology. “Boundary error and coincidence error are the two main sources of interference, which can lead to biased final measurement results.” Zhongde Xu emphasized. T-aperture is specially designed to dissipate the influence of particle values on the boundary. Its measured values are consistent with the actual situation. For recombination errors, the T-aperture technology is optimized in the algorithm to avoid inaccurate detection from the root.
True knowledge comes from practice! Palas® particle size spectrometer is widely praised for its reliable technology and careful manufacturing. It can be used in local atmospheric environment monitoring, laboratory research and navigation monitoring. Let’s see how it will contribute to the cause of atmospheric environmental protection in the future.
Palas® organizes a series of webinars on various topics to share professional knowledge of aerosol measurement technology. Palas® technical experts and industry scholars from all over the world will give you detailed online explanations. Welcome to register to attend and learn more about the webinars as soon as possible!
Topic: Study on aerosol concentration and particle size distribution
Time: Friday, June 2, 2023 15: 00 – 16: 00
Speaker: Mr. Jeff Yi
Market Manager of Industry & Science at Palas® China
You are welcome to register for the conference!
Click here to register