Journal article
Air-water PCB fluxes from southwestern Lake Michigan revisited
Environmental science and pollution research international, Vol.27(9), pp.8826-8834
03/2020
DOI: 10.1007/s11356-019-05159-1
PMCID: PMC6834886
PMID: 31062242
Abstract
From simultaneous air and water polychlorinated biphenyl (PCB) measurements collected in September 2010, we re-evaluated the direction and magnitude of net air-water exchange of PCBs in southwest Lake Michigan and compared them with estimations made using similar approaches 15 years prior. Air and water samples were collected during a research expedition on Lake Michigan at 5 km off the coast of Chicago, with prevailing winds from the southwest of our location. Gas-phase ΣPCB concentrations ranged from 190 to 1100 pg m−3 with a median of 770 pg m−3, which is similar to the concentrations measured in the City of Chicago at the same time and similar to concentrations measured in this part of the lake over the last 20 years. Water dissolved-phase ΣPCB concentrations ranged from 150 to 170 pg L−1 with a median of 160 pg L−1, which is one-tenth of that measured in the 1990s. ƩPCB net fluxes showed a slightly absorptive behavior, with a median of (−) 21 ng m−2 day−1 and an interquartile range of (−) 47 to (+) 5 ng m−2 day−1, where (−) and (+) fluxes indicate absorption and volatilization, respectively. Airborne PCB concentrations were higher when the winds were coming from Chicago and drive the deposition. Our fluxes are not significantly different from estimations from 1994 and 1995 and suggest that absorption of PCBs into the waters is slightly more prevalent than 15 years ago. It was confirmed that Chicago remains an important atmospheric source of PCBs to Lake Michigan.
Details
- Title: Subtitle
- Air-water PCB fluxes from southwestern Lake Michigan revisited
- Creators
- Aaron C BoesenAndres MartinezKeri C Hornbuckle
- Resource Type
- Journal article
- Publication Details
- Environmental science and pollution research international, Vol.27(9), pp.8826-8834
- DOI
- 10.1007/s11356-019-05159-1
- PMID
- 31062242
- PMCID
- PMC6834886
- NLM abbreviation
- Environ Sci Pollut Res Int
- ISSN
- 0944-1344
- eISSN
- 1614-7499
- Grant note
- DOI: 10.13039/100000066, name: National Institute of Environmental Health Sciences, award: P42ES013661; DOI: 10.13039/100000139, name: U.S. Environmental Protection Agency, award: GL-00E00515-0
- Language
- English
- Date published
- 03/2020
- Academic Unit
- Civil and Environmental Engineering; Occupational and Environmental Health; IIHR--Hydroscience and Engineering; Iowa Superfund Research Program
- Record Identifier
- 9983997433102771
Metrics
27 Record Views