PAHs in the Fraser River basin: a critical appraisal of PAH ratios as indicators of PAH source and composition

https://cyberleninka.org/article/n/567486.pdf

A review on polycyclic aromatic hydrocarbons: Source, environmental impact, effect on human health and remediation

PAH diagnostic ratios for the identification of pollution emission sources

A review has been written to assess the sources, fate and behavior of polycyclic aromatic hydrocarbons (PAH) in the atmosphere. PAH are formed mainly by anthropogenic processes, especially the combustion of organic fuels. PAH concentration in air will reflect the location of source emitters, with high concentrations corresponding with urban and industrial areas. PAH are however ubiquitous contaminants of the environment having been detected in remote areas of the world. This is thought to be due to long term transport in the atmosphere. PAH can also be subjected to chemical and/ or photochemical change whilst resident in the atmosphere prior to their removal by either wet or dry deposition.

A review of atmospheric polycyclic aromatic hydrocarbons : sources, fate and behavior

Quantification of urban organic aerosols at a molecular level: Identification, abundance and seasonal variation

Degradation photochimique de ces composes adsorbes sur des particules atmospheriques. Les conditions operatoires ont ete selectionnees de facon a simuler l'environnement rencontre par les particules liees aux HPA

Photolysis of polycyclic aromatic hydrocarbons adsorbed on fly ash

Fifteen polycyclic aromatic hydrocarbons (PAH) adsorbed on silica gel, alumina, fly ash, and carbon black were photolyzed in order to study their atmospheric fate. Photolytic half-lives for these particle-bound PAH were found to be highly dependent on the substrate to which they were adsorbed. On silica gel and alumina, PAH showed a wide range of photolytic half-lives, indicating a relationship between structure and photochemical reactivity. However, PAH on environmental substrates such as fly ash and carbon black show similar half-lives for most PAH, indicating a photolytic process that is independent of structure and dependent on the physical and chemical nature of the substrate. In fact, fly ash and carbon black appear to stabilize some PAH; this would facilitate their transport from combustion sources through the atmosphere.

Photolysis of polycyclic aromatic hydrocarbons adsorbed on simulated atmospheric particulates

A human lymphoblastoid cell line with ability to perform oxidative metabolism of various chemicals is mutated by the direct addition of an intact particulate soot. This experiment demonstrates that materials associated with combustion-generated particulates are biologically available and able to cause genetic changes in metabolically competent human cells.

A human cell line sensitive to mutation by particle-borne chemicals

The abundance and distribution of selected polycyclic aromatic hydrocarbons (pah) and oxy-pah, as well as the alkyl homologues of each, produced by automobiles equipped with diesel and spark-ignition engines were compared. These different engine types produced pah and oxy-pah mixtures which were qualitatively and quantitatively similar; thus, it will be difficult to differentiate diesel emissions from those produced by spark-ignition engines once they enter the environment. (Author/TRRL)

Thomas D. Behymer

Papers

Photolysis of polycyclic aromatic hydrocarbons adsorbed on fly ash

Photolysis of polycyclic aromatic hydrocarbons adsorbed on simulated atmospheric particulates

A human cell line sensitive to mutation by particle-borne chemicals

Similarity of some organic compounds in spark-ignition and diesel engine particulate extracts.