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Polycyclic and organochlorine hydrocarbons in sediments of the northern South China Sea
- Source :
- Marine Pollution Bulletin. 137:668-676
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- We investigated the concentration distribution and composition of organic pollutants in sediments of the shelf and the deep northern South China Sea (NSCS). Concentrations of polycyclic aromatic hydrocarbons (Σ15PAH; 10.69–66.45 ng g−1), Dichlorodiphenyltrichloroethane (Σ4DDT; 0–0.82 ng g−1), and polychlorinated biphenyls (Σ24PCB; 0–0.12 ng g−1) are below established sediment quality guidelines, suggesting no environmental risk. Surprisingly, concentrations increase from the shelf to the deep NSCS, and are higher in the east of the study area. The organic pollutant composition indicates PAH mainly derived from pyrogenic sources, and mostly degraded DDT and PCB. However, in the deep NSCS, considerable contribution of petrogenic PAH, low chlorinated PCB and p,p′-DDT suggest more recent input from different sources compared to the shelf. From these results we infer that organic pollution in the NSCS does not originate from the Pearl River Estuary but from the NE SCS, SW of Taiwan.
- Subjects :
- Pollutant
Pollution
Geologic Sediments
geography
South china
geography.geographical_feature_category
010504 meteorology & atmospheric sciences
media_common.quotation_subject
Sediment
Estuary
010501 environmental sciences
Aquatic Science
Oceanography
01 natural sciences
Environmental risk
Environmental chemistry
Hydrocarbons, Chlorinated
Environmental science
Polycyclic Aromatic Hydrocarbons
Water Pollutants, Chemical
0105 earth and related environmental sciences
media_common
Subjects
Details
- ISSN :
- 0025326X
- Volume :
- 137
- Database :
- OpenAIRE
- Journal :
- Marine Pollution Bulletin
- Accession number :
- edsair.doi.dedup.....4bd2f338d91b38faaf1533d1f744ec06
- Full Text :
- https://doi.org/10.1016/j.marpolbul.2018.10.039