Biogeochemical Approaches to Assess PAH Pollution in an Urban Waterway
| Autor: | Xianhao Cheng, Jennifer Forsythe, Earl Peterkin |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Pollution
Biogeochemical cycle Time Factors Watershed media_common.quotation_subject Polycyclic aromatic hydrocarbon Water column Water Pollution Chemical Environmental Chemistry Ecosystem Cities Polycyclic Aromatic Hydrocarbons Waste Management and Disposal Water Science and Technology media_common chemistry.chemical_classification Hydrology Ecological Modeling Drainage Sanitary Sediment Pennsylvania Diagenesis chemistry Environmental chemistry Environmental science Seasons Water Pollutants Chemical |
| Zdroj: | Water Environment Research. 87:2107-2119 |
| ISSN: | 1554-7531 1061-4303 |
| DOI: | 10.2175/106143015x14362865227436 |
| Popis: | Biogeochemical approaches were applied to enhance the study on polycyclic aromatic hydrocarbon (PAH) pollution in an urban waterway. Chemical characterizations of PAHs in the studied area were identified, geochemical factors were revealed, and related mechanisms were discussed. It was found that, during summer, an early diagenetic process in the sediment could play a major role for the existence of high PAH concentrations, especially high molecular weight PAHs (≥ 4 rings), in the water column and sediment porewater. This effect could vary with tidal cycling, and higher PAH concentration in the water column would be expected during low tide. Other potential pollution sources were also evaluated in the studied creek. Results showed that pyrogenic sources dominated in the creek, generally. Nevertheless, petroleum products from a metal recycling plant could be an important point source to the waterway during wet weather. Comparing with previous studies in other waterways of the same watershed and published literature suggested that the limited toxicity to the ecosystem was only detected in sediments. More information needs to be collected during low tide for a more objective evaluation of PAH toxicity in the creek. |
| Databáze: | OpenAIRE |
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