I first met Kevin Jones when he started at the University of Lancaster. He proposed that we collaborate on polycyclic aromatic hydrocarbons (PAH). He had several soil samples collected over the last 150 years from an agricultural research field station in the UK, and he wondered about the time-trends of deposition of PAH. We, of course, jumped at the idea, and Kevin ended up publishing a highly collaborative paper titled “Increases in the polynuclear aromatic hydrocarbon content of an agricultural soil over the last century,” by K. C. Jones, J. A. Stratford, K. S. Waterhouse, E. T. Furlong, W. Giger, R. A. Hites, C. Schaffner, and A. E. Johnson, in Environmental Science & Technology (1989, 23, 95-101). In honor of that earlier work, this presentation will bring us up to date on measurements of PAH in the vapor and particle phase of atmospheric samples collected around the Great Lakes for 24 hours once every 12 days since about 1990. We have analyzed about 2000 concentrations of 22 different PAH using multiple regression of the form: ln(C) = a_0 + a_1 t + a_2 sin(zt) + a_3 cos(zt) + a_4 log(pop) + a_5 ln(ws) + a_6 sin(wd) + a_7 cos(wd), where “t” is the sampling date, “z” =6.28/365.25, “pop” is the number of people within a 25-km radius of the sampling site, “ws” is the average wind speed during sampling, and “wd” is the average wind direction (in radians) during sampling. There is a wealth of information in these fitted coefficients.

Temporal trends of polycyclic aromatic hydrocarbons in the UK and the USA

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.