PAH source differentiation between historical MGP and significant urban influences for sediments in San Francisco Bay
| Autor: | Randy E. Jordan, Laura S. McWilliams, Theodor C. Sauer, Helder J. Costa, Mark J. Cejas |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Geologic Sediments Source characterization Manufactured gas 010604 marine biology & hydrobiology Sediment 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Pollution law.invention Creosote Bays law Environmental chemistry Environmental science Potential source San Francisco Polycyclic Aromatic Hydrocarbons Bay Water Pollutants Chemical 0105 earth and related environmental sciences Environmental Monitoring |
| Zdroj: | Marine pollution bulletin. 166 |
| ISSN: | 1879-3363 |
| Popis: | A forensic source evaluation of polycyclic aromatic hydrocarbons (PAHs) in nearshore sediments in San Francisco Bay examined total PAH greater than ambient concentrations in sediments, and potential pyrogenic source relationships with respect to PAH compounds typically associated with point and nonpoint pyrogenic source types, including PAHs potentially associated with historical manufactured gas plant (MGP) operations. Diagnostic source ratio analysis was employed for determination of potential PAH source relationships. A two-model approach indicated distinct potential source signatures, as identified from the distributions of higher PAH concentrations in some sediments. Source characterization was aided by Polytopic Vector Analysis (PVA) and data visualization with t-Distributed Stochastic Neighbor Embedding (t-SNE). Two signatures exhibited pyrogenic character likely consistent with historical MGP sources, and one signature was related to creosote. A distinct and significant source of PAHs to the investigation area sediment consisted of ubiquitous nonpoint and potential unidentified point sources is termed “urban influence”. |
| Databáze: | OpenAIRE |
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