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142 
URBAN PM 2.5 IN AIR AND SECONDARY ORGANIC AEROSOL FORMATION 
 
Karl Z. M.
1,2
, Omirzakova A.T.
2,3
 
Research supervisor: c.ch.sc., senior teacher Vassilina G.K.
1,2
 
1
Al-Farabi Kazakh National University, Almaty, Kazakhstan 
2
Society of Petroleum Engineers International 
3
Nazarbayev University, Astana, Kazakhstan 
zhansaya.karl@mail.ru

 
Fine particulate matter (PM 2.5) is a most prominent atmosphere clouding whereby 
thoroughly exerts influence pneumatic homo health, ambience amend, air environment quality 
assurance (AEQA). Considering a perceptive dial indicator about atmospheric oxidizing capacity, 
oxidanyl (H
2
O
2
) contributes to secondary organic aerosol (SOA) arrangements through primary 
pollutants’ metamorphosis. Aerobic H
2
O
2
is the typical reactive oxygen specie (ROS) which adjusts 
the chemical estimate of odd-hydrogen radicals (OH and HO
2
) causing oxidative stress posing 
severe health risks. 
The aerobic H
2
O
2
interacts with PM 2.5 in a heterogeneous phase which adduce to substantial 
impact H
2
O
2
balance as well as the aerosol oxidation capacity. Free aerobic H
2
O
2
removal carried 
out since H
2
O
2
uptake by PM 2.5 and it was about 65% of the total removal. The DLVO theory 
permits the migration and transfer of aerobic H
2
O
2
to the PM 2.5 phase which contributes for 
further oxidants’ delivery to aerosols. Engrossed ROS enhanced the production of several oxidized 
compounds therefore aggravate AEQA and causing poisoning of the immune system. 
Single-pollutant model of natural PM 2.5 consists of water-soluble inorganic ions (WSIIs) 
and carbonaceous compounds (CCs). CCs occur as organic carbon (OC) and elemental carbon 
(EC). WSIIs are subdivided into cations (NH
4
+
, Na
+
, K
+
, Mg
2+
, Ca
2+
) and anions (Cl
-
, NO
3
-
, SO
4
2-
). 
However, PM 2.5 arises by anthropogenic factors too, satisfying the composition of PM 2.5 is 
advanced by aromatic hydrocarbons (chlorinated organic pesticides) for OC’s and heavy transition 
metals (Ti
2+
, Cu
2+
, Fe
2+
) for WSIIs. SOA formations by OC and H
2
O
2
and heavy metals become 
more stable and mobile than natural analogue by the creation of donor-acceptor bonds between 
transition metals and O
2
of OCs by complexes. 

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