Winddirection dependent sampling to be uses for source apportionment 

The Genius5 Windselect includes an interface, where an ultrasonic windsensor can be connected. The Windsensor measures Windspeed and Wind direction and transfes the results to the Genius5 controller. The software enables the selection of Windsectors for sampling. The controller samples to different cartridges dependent on Wind speed and wind direction

By this concept the impact of sources in correlation to background levels can be measured. The user defines wind direction sectors and defines the correlated cartridge. After the measurement periode, the cartridges are sent to the laboratory together with the USB memorystick, wher the cartridges are analysed for pollutants.

Potential for fine dust (PM10, PM2.5) reduction

Hot spot sites near a streat or a point source and Background sites show different concentrations of dust. Regular 24 hours measurements don´t provide informations of local traffic impact or point ource impact to the resut. Genius5 Windselect samples fine dust to different cartridges, dependent if the wind comes from the Background area or directly from a Point source/traffic. During clam condition the Genius5 samples to a 3rd cartridge, while wind speed is below the set calm limit.

The Windselect data give valueable information, about adverse dispersion effects or low level point sources and the potential for PM10 reduction in µg/m3, if the emissions of the point source/street arereduced.

Increase parameters for Positive Matrix Factorization

Besides the PM10 levels, other parameters provide additional informations, to separate the influence of several point sources:

  1. All cartrides sample the fraction greater than 10µm with a 50% cutpoint, providing information about pollutant deposition

  2. Cartridge FU_10 is designed to sample PM10 in combination with POP´s (persitstant organic pollutants), or other carcinogenics like PAH´s, oxidised PAH, Nitro PAH

  3. Cartridge FU_20 is designed to sample PM10 in combination with metals, gaseous mercury

  4. Cartridge FU_30 samples PM10, PM2.5, as well as POP´s and carcinogenic pollutants

Additional parameters may be used to calculate the impact of many different sources to PM10, PM2.5 concentrations like a finger print.

 

 

  PDF Download