Updated Polychlorinated Biphenyl Mass Budget for Lake Michigan
| Autor: | Marta Venier, Kevin Romanak, Ronald A. Hites, An Li, Stephen M. Westenbroek, Russell G. Kreis, Jiehong Guo |
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| Rok vydání: | 2017 |
| Předmět: |
Geologic Sediments
Indiana Michigan 010504 meteorology & atmospheric sciences Water exchange 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Settling Environmental monitoring Tributary Environmental Chemistry Mass budget 0105 earth and related environmental sciences Hydrology Chicago geography geography.geographical_feature_category Sediment Polychlorinated biphenyl General Chemistry Polychlorinated Biphenyls Lakes chemistry Environmental chemistry Environmental science Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental sciencetechnology. 51(21) |
| ISSN: | 1520-5851 |
| Popis: | This study revisits and updates the Lake Michigan Mass Balance Project (LMMBP) for polychlorinated biphenyls (PCBs) that was conducted in 1994–1995. This work uses recent concentrations of PCBs in tributary and open lake water, air, and sediment to calculate an updated mass budget. Five of the 11 LMMBP tributaries were revisited in 2015. In these five tributaries, the geometric mean concentrations of ∑PCBs (sum of 85 congeners) ranged from 1.52 to 22.4 ng L–1. The highest concentrations of PCBs were generally found in the Lower Fox River and in the Indiana Harbor and Ship Canal. The input flows of ∑PCBs from wet deposition, dry deposition, tributary loading, and air to water exchange, and the output flows due to sediment burial, volatilization from water to air, and transport to Lake Huron and through the Chicago Diversion were calculated, as well as flows related to the internal processes of settling, resuspension, and sediment–water diffusion. The net transfer of ∑PCBs is 1240 ± 531 kg yr–1 out of the l... |
| Databáze: | OpenAIRE |
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