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ORGANIZER;CN=Natalie Leung:mailto:[log in to unmask]
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN=LISTSERV.s
ocaar-l:mailto:[log in to unmask]
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN="Moussa,Sam
ar (ECCC)":mailto:[log in to unmask]
ATTACH:CID:[log in to unmask]
DESCRIPTION;LANGUAGE=en-US:Hi Everyone\,\n\nPlease join us for our next SOC
AAR Seminar on:\n\n\nWednesday\, March 6\, 2024 3:00PM - 4:00PM EST\n\n\n\
nDr. Samar Moussa\n\nResearch Scientist\n\nAir Quality Research Division\n
Environment and Climate Change Canada\n\nTitle: Multi-phase Oxidation of T
ire Derived Chemicals on Atmospheric Surfaces\n\nAbstract: Tires are comp
rised of a complex mixture of chemicals that are added to the rubber to in
crease their durability and stability. Such tire derived chemicals (TDCs)
\, often found within tire wear particles (TWP)\, encompass a wide array o
f organic compounds. With increased mitigation efforts to control on-road
exhaust emissions\, non-exhaust TWP are expected to progressively become
the major source of traffic related particles emitted to the atmosphere. A
s a result\, understanding the chemical composition of airborne TWP\, thei
r transformation products\, and their associated toxicity will be critical
to effectively mitigating air pollution related to tire wear chemicals.
N′-phenyl-p-phenylenediamines (PPDs)\, a class of tire wear cyclic amine
s used as anti-oxidants during the manufacturing of tires\, have been gain
ing attention due to their high toxicity to aquatic life. In the current
work heterogeneous oxidation experiments of select PPDs with multiple atmo
spheric oxidants were performed in real-time using Attenuated total reflec
tance- Fourier transform infrared spectroscopy (ATR-FTIR). The results she
d light on the major reaction pathways\, and the various oxidation product
s formed\, while providing insight into their oxidation mechanisms and che
mical kinetics. Multiple oxidation products such as quinones\, nitramines
and nitrosamines were detected\, which form very rapidly\, highlighting t
he important role that atmospheric transformations can play in the overall
fate of tire wear chemicals which are ultimately found in aquatic environ
ments. The work also suggests that more attention should be paid to the tr
ansformation of cyclic amines emitted from tires to the atmosphere\, along
with their toxicity\, as a potentially important route to human health im
pacts via airborne exposure.\n\n__________________________________________
______________________________________\nMicrosoft Teams meeting\nJoin on y
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___________________________________________\n\n
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010000000E7D9B20BED8FB24E891F3DFF77B96A6E
SUMMARY;LANGUAGE=en-US:SOCAAR Seminar - Samar Moussa
DTSTART;TZID=Eastern Standard Time:20240306T150000
DTEND;TZID=Eastern Standard Time:20240306T160000
CLASS:PUBLIC
PRIORITY:5
DTSTAMP:20240221T230016Z
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