What question did this study set out to answer?

To determine whether adsorption onto soot carbon or absorption into aerosol organic matter governs the atmospheric gas-particle partitioning of polycyclic aromatic hydrocarbons.

August 2, 2000Environmental Science & Technology

Adsorption onto Aerosol Soot Carbon Dominates Gas-Particle Partitioning of Polycyclic Aromatic Hydrocarbons

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Authors

JDJordi DachsInstitute of Environmental Assessment and Water Research SESteven J. EisenreichVrije Universiteit Brussel

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Implication

Observational analysis demonstrates soot adsorption drives gas-particle partitioning of polycyclic aromatic hydrocarbons over organic absorption, indicating soot dominates atmospheric aerosol uptake.

Key Points

To determine whether adsorption onto soot carbon or absorption into aerosol organic matter governs the atmospheric gas-particle partitioning of polycyclic aromatic hydrocarbons.
Measured gas- and aerosol-phase polycyclic aromatic hydrocarbon (PAH) concentrations, alongside elemental and organic carbon levels, from ambient air samples collected in Baltimore and over the Chesapeake Bay in July 1997.
Estimated soot/air (K_SA) and octanol/air (K_OA) partition coefficients to evaluate the relative contributions of soot adsorption versus organic matter absorption.
Absorption into aerosol organic carbon accounts for less than 10% of total particulate-phase PAHs.
Adsorption onto soot accurately predicts total suspended particulate matter-normalized partition coefficients (K_P), estimating phenanthrene K_P within a factor of 3 over the Chesapeake Bay and within a factor of 5 to 10 in Baltimore.

Cite This Study

Dachs et al. (2000) studied this question.

synapsesocial.com/papers/6a72a8ce2163a0a01bc63abf https://doi.org/10.1021/es991201+

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Implication

Observational analysis demonstrates soot adsorption drives gas-particle partitioning of polycyclic aromatic hydrocarbons over organic absorption, indicating soot dominates atmospheric aerosol uptake.

Adsorption onto Aerosol Soot Carbon Dominates Gas-Particle Partitioning of Polycyclic Aromatic Hydrocarbons

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Implication

Key Points

Cite This Study

Adsorption onto Aerosol Soot Carbon Dominates Gas-Particle Partitioning of Polycyclic Aromatic Hydrocarbons

Discussion

Member takes

Implication

Key Points

Cite This Study

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