CARBONACEOUS PARTICLES IN THE AIR MORAVIAN-SILESIAN REGION

VYSOKÁ ŠKOLA BÁŇSKÁ – TECHNICKÁ UNIVERZITA OSTRAVA FAKULTA STROJNÍ, KATEDRA ENERGETIKY 17. LISTOPADU 15, 708 33 OSTRAVA - PORUBA http://katedry.fs.vsb.cz/energetika

UHLÍKATÉ ČÁSTICE V OVZDUŠÍ MORAVSKOSLEZSKÉHO KRAJE

CARBONACEOUS PARTICLES IN THE AIR MORAVIAN-SILESIAN REGION Ing. MAREK KUCBEL Ing. Barbora SÝKOROVÁ, prof. Ing. Helena RACLAVSKÁ, CSc.


Aim of this work The aim of this work is determination potential sources of pollution at selected localities in the Moravian-Silesian Region based on information found on the distribution of OC, EC in PM10 from emission sources and air pollution.

CARBONACEOUS PARTICLES IN THE AIR MORAVIAN-SILESIAN REGION


Definitions of Terms - The atmospheric particulate matter (PM) in an urban environment consists of 20 % – 50 % carbonaceous particles. - Carbonaceous particles is usually divided in two fractions, elemental carbon (EC, sometimes referred to as black carbon) and organic carbon (OC).

Figure 1. Carbonaceous particles from fossil fuel combustions CARBONACEOUS PARTICLES IN THE AIR MORAVIAN-SILESIAN REGION


Definitions of Terms -

EC is a primary pollutant formed in incomplete combustion processes whereas OC is a complex mixture of many groups of compounds originating from primary sources and secondary formation processes (formed by the condensation of compounds produced in the atmosphere by photooxidation of volatile organic precursors).



Effect of EC and OC to environment and human health -

-

The presence of carbonaceous aerosols in the atmosphere affects the radiation balance and the Earth's climate, as well as human health from regional to a global extent. EC, which absorbs solar radiation, OC is capable of partially absorbing solar radiation, but also of dissipating it



Thermal-optical analysis - TOA has been widely used for the determination of OC and EC in atmospheric aerosol samples. - The carbonaceous species are thermally desorbed firstly in an inert atmosphere (He) and then in an oxidizing atmosphere (mixture of He and O2). - Ideally, OC desorbs in the inert atmosphere while EC combusts in the oxidizing atmosphere at high temperature.

Figure 2. OC/EC analyzer CARBONACEOUS PARTICLES IN THE AIR MORAVIAN-SILESIAN REGION


Sampling site



Average emission of OC and PM10



Air pollution of OC, EC, PM10 in selected localities



Air pollution of OC, EC in selected localities

Sampling

site Ostrava Radvanice Třinec

6:1

10:1

6:1

Třinec Oldřichovice

EC/PM10

OC/PM10

OM/PM10

[%]

[%]

[%]

4.9

30.4

42.6

3.5

35.7

50.0

4.6

21.8

30.5



Conclusion - It was found that OC is dominant form in PM10 (selected localities in MSR) with a higher content of the secondary organic carbon (SOC) - The highest concentration of PM10, OC and EC were measured in Ostrava-Radvanice. - Values of organic matter were in a range of 30.5 - 50.0% (average 41%). - OC in PM10 from emission sources showed that the average contribution OC was 19 % from metallurgy and 28 % from the power and heating plants.



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CARBONACEOUS PARTICLES IN THE AIR MORAVIAN-SILESIAN REGION

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