Occurrence and distribution of polycyclic aromatic hydrocarbons in surface sediments of San Diego Bay marinas

TitleOccurrence and distribution of polycyclic aromatic hydrocarbons in surface sediments of San Diego Bay marinas
Publication TypeJournal Article
Year of Publication2017
AuthorsNeira C, Cossaboon J, Mendoza G, Hoh E, Levin LA
JournalMarine Pollution Bulletin
Volume114
Pagination466-479
Date Published2017/01
ISBN Number0025-326X
Keywordsmarina; pollution; Polycyclic aromatic hydrocarbons; San Diego Bay; spatial distribution; Surface sediment
Abstract

Polycyclic aromatic hydrocarbons (PAHs) have garnered much attention due to their bioaccumulation, carcinogenic properties, and persistence in the environment. Investigation of the spatial distribution, composition, and sources of PAHs in sediments of three recreational marinas in San Diego Bay, California revealed significant differences among marinas, with concentrations in one site exceeding 16,000 ng g− 1. ‘Hotspots’ of PAH concentration suggest an association with stormwater outfalls draining into the basins. High-molecular weight PAHs (4–6 rings) were dominant (> 86%); the average percentage of potentially carcinogenic PAHs was high in all sites (61.4–70%) but ecotoxicological risks varied among marinas. Highly toxic benzo(a)pyrene (BaP) was the main contributor (> 90%) to the total toxic equivalent quantity (TEQ) in marinas. PAHs in San Diego Bay marina sediments appear to be derived largely from pyrogenic sources, potentially from combustion products that reach the basins by aerial deposition and stormwater drainage from nearby streets and parking lots.

DOI10.1016/j.marpolbul.2016.10.009
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