Secondary Organic Aerosol Formation from Urban Roadside Air in Hong Kong

Environmental Science & Technology
Tengyu LiuChak K Chan

Abstract

Motor vehicle emissions are an important but poorly constrained source of secondary organic aerosol (SOA). Here, we investigated in situ SOA formation from urban roadside air in Hong Kong during winter time using an oxidation flow reactor (OFR), with equivalent atmospheric oxidation ranging from several hours to several days. The campaign-average mass enhancement of OA, nitrate, sulfate, and ammonium upon OFR aging was 7.0, 7.2, 0.8, and 2.6 μg m-3, respectively. To investigate the sources of SOA formation potential, we performed multilinear regression analysis between measured peak SOA concentrations from OFR and the concentrations of toluene that represent motor vehicle emissions and cooking OA from positive matrix factorization (PMF) analysis of ambient OA. Traffic-related SOA precursors contributed 92.3%, 92.4%, and 83.1% to the total SOA formation potential during morning rush hours, noon and early afternoon, and evening meal time, respectively. The SOA production factor (PF) was approximately 5.2 times of primary OA (POA) emission factor (EF) and the secondary particulate matter (PM) PF was approximately 2.6 times of primary particles EF. This study highlights the potential benefit of reducing secondary PM production from...Continue Reading

References

Feb 17, 2005·The Science of the Total Environment·Peter K K LouieDella W M Sin
Jul 18, 2006·Journal of Hazardous Materials·K F HoChak K Chan
Nov 20, 2009·Environmental Science & Technology·Joost de Gouw, Jose L Jimenez
Mar 3, 2010·Proceedings of the National Academy of Sciences of the United States of America·D K FarmerJ L Jimenez
Mar 27, 2012·Journal of the Air & Waste Management Association·Steven Sai Hang HoYu Huang
Jun 22, 2013·Environmental Science & Technology·Andrew A MayAllen L Robinson
Sep 5, 2014·Environmental Science & Technology·Daniel S TkacikAllen L Robinson
Jan 23, 2016·Environmental Science & Technology·Naomi ZimmermanGreg Evans
Sep 15, 2016·Environmental Science & Technology·Simone M PieberAndré S H Prévôt
Sep 19, 2016·The Science of the Total Environment·Ye WuSvetlana Stevanovic
Oct 27, 2016·Journal of Hazardous Materials·Chiung-Yu PengYi-Chun Kuo
Dec 22, 2016·Environmental Science & Technology·Drew R GentnerAllen L Robinson
May 26, 2017·The Science of the Total Environment·Tengyu LiuChak K Chan
May 31, 2018·Environmental Science & Technology·Provat K SahaAndrew P Grieshop
Jun 13, 2018·Environmental Science & Technology·Ågot K WatneÅsa M Hallquist
Jul 20, 2018·Environmental Science & Technology·Jonathan M WangGreg J Evans

❮ Previous
Next ❯

Citations

Apr 22, 2020·Chemical Society Reviews·Zhe Peng, Jose L Jimenez
Mar 3, 2021·Faraday Discussions·Masao GenChak K Chan
Jul 4, 2021·The Science of the Total Environment·Liyuan ZhouChak K Chan
Dec 24, 2019·Environmental Science & Technology·Spiro D JorgaSpyros N Pandis
Dec 31, 2020·Environmental Science & Technology·Xiangxinyue MengMin Hu

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.