Size distribution of airborne particle-bound PAHs and o-PAHs and their implications for dry deposition.

08:00 EDT 12th June 2019 | BioPortfolio

Summary of "Size distribution of airborne particle-bound PAHs and o-PAHs and their implications for dry deposition."

The present study was conducted to examine the potential mechanisms responsible for the distribution of polycyclic aromatic hydrocarbons (PAHs) and their oxygenated derivatives (o-PAHs) in size fractionated particles and their environmental implications. Size-fractionated atmospheric particles were collected at urban Shanghai, China and analyzed for 5 PAHs and 6 o-PAHs. The concentrations of particle-bound ∑6o-PAHs (sum of 6 o-PAH congeners, 19.1 ± 4.5 ng m-3) were significantly higher than those of ∑5PAHs (sum of 5 PAHs, 9.5 ± 1.9 ng m-3). The size-fractionated distributions of airborne ∑5PAHs and ∑6o-PAHs displayed bimodal peaks at 0.7-1.1 and 9.0-10.0 μm. Emission sources and volatility were important factors influencing the size distribution of particle-bound 5 PAHs and 6 o-PAHs. The dry deposition fluxes of particle-bound 6 o-PAHs estimated from the measured data (3087 ± 467 ng m-2 d-1) were approximately 2 times higher than those of PAHs (1531 ± 344 ng m-2 d-1), with a total deposition flux of 4618 ± 743 ng m-2 d-1. The relative contributions of particles to dry deposition were also size-dependent, e.g., coarse (aerodynamic diameters (Dp) > 2.1 μm) particles dominated the dry deposition fluxes of PAHs and o-PAHs. These results highlight the significance of providing a comprehensive understanding of particle size distribution of PAHs and o-PAHs and their implication for dry deposition in China.


Journal Details

This article was published in the following journal.

Name: Environmental science. Processes & impacts
ISSN: 2050-7895


DeepDyve research library

PubMed Articles [11504 Associated PubMed Articles listed on BioPortfolio]

Emission behaviors of nitro- and oxy-polycyclic aromatic hydrocarbons during pyrolytic disposal of electronic wastes.

Emission factors (EFs) of polycyclic aromatic hydrocarbon (PAH) derivatives (12 nitro-PAHs and 4 oxy-PAHs) during the pyrolysis of two types of electronic waste (E-waste) were measured. Compositional ...

Size-segregated particulate matter bound polycyclic aromatic hydrocarbons (PAHs) over China: Size distribution, characteristics and health risk assessment.

Polycyclic aromatic hydrocarbons (PAHs) associated with size-segregated particulate matter at 10 sampling sites over China which can be grouped into North China and South China, including urban site, ...

Pollution of polycyclic aromatic hydrocarbons (PAHs) in drinking water of China: Composition, distribution and influencing factors.

Polycyclic aromatic hydrocarbons (PAHs) are a kind of persistent toxic substances, which have been frequently detected in environmental media. However, studies on their occurrences and distributions i...

Polycyclic aromatic hydrocarbon (PAHs) geographical distribution in China and their source, risk assessment analysis.

In China, the huge amounts of energy consumption caused severe carcinogenic polycyclic aromatic hydrocarbon (PAHs) concentration in the soil and ambient air. This paper summarized that the references ...

Spatio-temporal distribution and sources identifications of polycyclic aromatic hydrocarbons and their alkyl homolog in surface sediments in the central Arabian Gulf.

The quantitative analysis of 18 parents and their alkyl homologs was performed in sediment samples from the central Arabian Gulf (Gulf) around Qatar Peninsula in six sequential seasons, winter 2014 to...

Clinical Trials [2786 Associated Clinical Trials listed on BioPortfolio]

Evaluation of Post-Exposure Sauna Treatment of Firefighters - A Pilot Study

Firefighters are at increased risk of cancer, and both inhalation and dermal routes contribute to overall exposure to carcinogens, including polycyclic aromatic hydrocarbons (PAHs). The pu...

Emission Patterns of Respiratory Syncytial Virus

The purpose of this observational study is to describe the environmental aerosolization patterns burden of RSV in the air and on surfaces in surrounding adult patients in a real-life setti...

Pair Production PET Imaging to Detect Particle Distribution in Patients Undergoing Yttrium-90 Radioembolization

The primary goal of the study is to see if the PET/CT will be able to determine the precise location of the Y-90 particles within the liver and within the tumors. We hope to use this infor...


The main objective of this study is to highlight a relationship between exposure to PAHs, genotoxic effect biomarkers on spermatozoa and follicular cells, as well as embryonic quality and ...

Asthma & Exposure to Peaks in Particulate Air Pollution

We are testing the following two hypotheses: 1) Peaks in hourly exposures to airborne particulate matter (PM) of outdoor origin will be more closely associated with acute asthmatic respons...

Medical and Biotech [MESH] Definitions

Relating to the size of solids.

An analytical technique for measuring particle size of molecules that are less than a micron in diameter dispersed or dissolved in a liquid.

The probability distribution associated with two mutually exclusive outcomes; used to model cumulative incidence rates and prevalence rates. The Bernoulli distribution is a special case of binomial distribution.

A distribution function used to describe the occurrence of rare events or to describe the sampling distribution of isolated counts in a continuum of time or space.

A distribution in which a variable is distributed like the sum of the squares of any given independent random variable, each of which has a normal distribution with mean of zero and variance of one. The chi-square test is a statistical test based on comparison of a test statistic to a chi-square distribution. The oldest of these tests are used to detect whether two or more population distributions differ from one another.

Quick Search


DeepDyve research library

Relevant Topic

Pulmonary Hypertension
Pulmonary arterial hypertension (PAH) is a chronic, life-threatening disorder characterized by abnormally high blood pressure in the arteries between the heart and lungs of affected individuals. Symptoms can range from mild breathles...

Searches Linking to this Article