Significant restructuring and light absorption enhancement of black carbon particles by ammonium nitrate coating

Environmental Pollution
Cheng YuanZiqiong Wang

Abstract

Field observations have suggested that particulate nitrate can promote the aging of black carbon (BC), yet the mechanisms of the aging process and its impacts on BC's light absorption are undetermined. Here we performed laboratory simulation of internal mixing of flame-generated BC aggregates with ammonium nitrate. Variations in particle size, mass, coating thickness, effective density, dynamic shape factor, and optical properties were determined online by a suite of instruments. With the development of coatings, the particle size initially decreased until reaching a coating thickness of ∼10 nm and then started increasing, accompanied by an increase in effective density and a decrease in dynamic shape factor, reflecting the transformation of BC particles from highly fractal to near-spherical morphology. This is partially attributable to the restructuring of BC cores to more compact forms. Exposing coated particles to elevated relative humidity (RH) led to additional BC morphology changes, even after drying. Particle light absorption and scattering were also amplified with ammonium nitrate coating, increasing with coating thickness and RH. For BC particles with a 17.8 nm coating, absorption and scattering were increased by 1.5- ...Continue Reading

References

Jul 23, 2008·Proceedings of the National Academy of Sciences of the United States of America·Renyi ZhangPeter H McMurry
Jan 17, 2009·The Journal of Physical Chemistry. a·Alexei F KhalizovRenyi Zhang
May 30, 2009·Environmental Science & Technology·Huaxin XueRenyi Zhang
Sep 4, 2009·Physical Chemistry Chemical Physics : PCCP·Huaxin XueRenyi Zhang
Aug 3, 2012·Environmental Science & Technology·Chong QiuRenyi Zhang
Feb 6, 2013·Environmental Science & Technology·Alexei F KhalizovRenyi Zhang
Nov 26, 2014·Proceedings of the National Academy of Sciences of the United States of America·Song GuoRenyi Zhang
May 6, 2015·Chemical Reviews·Renyi ZhangYuan Wang
Oct 1, 2015·Nature Communications·Shang LiuAndré S H Prévôt
Feb 15, 2016·The Science of the Total Environment·Xinjuan CuiÖrjan Gustafsson
Apr 2, 2016·Proceedings of the National Academy of Sciences of the United States of America·Jianfei PengRenyi Zhang
Jul 8, 2016·Environmental Science & Technology·Song GuoRenyi Zhang
Nov 17, 2016·Proceedings of the National Academy of Sciences of the United States of America·Gehui WangMario J Molina
Dec 6, 2016·Scientific Reports·Yu WuHao Chen
Dec 13, 2016·Environmental Pollution·Bing ChenÖrjan Gustafsson
Sep 30, 2017·Scientific Reports·A C ErikssonE Swietlicki
Nov 11, 2017·Scientific Reports·Can LiRussell R Dickerson
Nov 22, 2018·Environmental Science & Technology·Chao ChenAlexei F Khalizov

❮ 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.