Distributions and fate of chlorinated pesticides, biomarkers and polycyclic aromatic hydrocarbons in sediments along a contamination gradient from a point-source in San Francisco Bay, California

Pereira, Wilfred E.; Hostettler, Frances D.; Rapp, John B.

doi:10.1016/0141-1136(95)00021-6

Cited by 141 publications

(69 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Compared with data reported a decade ago (98.8 AE 88.9 ng g À1 , Connell et al, 1998), the PAH levels in Deep Bay have increased by a factor of 2.6. Current PAH concentrations in surface sediment were similar to those found in the South China Sea (286 ng g À1 , Chen et al, 2006), Masan Bay, Korea (353 AE 252 ng g À1 , Khim et al, 1999), Xiamen Bay, China (367 AE 87 ng g À1 , Zhou et al, 2000) and the Pearl River estuary of South China (552 ng g À1 , Mai et al, 2001; 749 ng g À1 , Chen et al, 2006), and were higher than those found in Chesapeake Bay (52 ng g À1 , Forster and Wright, 1988), but were much lower than those found in Victoria Harbour, Hong Kong (5277 AE 7904 ng g À1 , Hong et al, 1995) and in San Francisco Bay (7457 AE 6908 ng g À1 , Pereira et al, 1996).…”

Section: Pahs In Seawater Spm and Surface Sedimentmentioning

confidence: 77%

Polycyclic aromatic hydrocarbons (PAHs) in the water column and sediment core of Deep Bay, South China

Qiu

Zhang

Liu

et al. 2009

Estuarine, Coastal and Shelf Science

154

View full text Add to dashboard Cite

Section: Pahs In Seawater Spm and Surface Sedimentmentioning

confidence: 77%

Polycyclic aromatic hydrocarbons (PAHs) in the water column and sediment core of Deep Bay, South China

Qiu

Zhang

Liu

et al. 2009

Estuarine, Coastal and Shelf Science

154

View full text Add to dashboard Cite

“…If no fresh DDT was introduced, the relative percentage of DDT in ΣDDTs should gradually decrease, whereas the fraction of DDT metabolites should increase proportionally (Pereira et al 1996;Lee et al 2001). As a result, the DDT/ (DDD + DDE) ratio decreases as a function of time.…”

Section: Sourcesmentioning

confidence: 99%

Atmospheric depositional fluxes and sources apportionment of organochlorine pesticides in the Pearl River Delta region, South China

Huang

Song

Zhang

et al. 2013

Environ Monit Assess

View full text Add to dashboard Cite

Organochlorine pesticides (OCPs) have variously been phased out in agricultural activities, but they are still widely detected in air, water, and soil systems due to their recalcitrant nature in the environment. The purposes of this study were to assess potential OCP pollution via dry and wet deposition over the fast developing Pearl River Delta area with 41,700 km 2 , where the main effort has been focused on emerging pollutants such as petroleum hydrocarbons and PM2.5. We quantified both the dry and wet deposition fluxes of 19 OCPs including dichlorodiphenyltrichloroethanes (DDTs), endosulfans (Endos), and hexachlorocyclohexanes (HCHs). The results showed that each year about 67.4, 42.0, 15.0, and 8.07 kg of total OCPs, DDTs, Endos, and HCHs were returned to the ground, among which 11.7, 10.4, 0.84, and 0.16 kg were in the dry deposition forms. The large spatial variations in OCP deposition fluxes indicated that OCP pollution in the air is mainly influenced on local scales because evaporation from local soil is likely the major source of the phased out OCPs. Source analysis indicated that DDTs may be still in use as antifouling agent and/or dicofol, but Endos and HCHs were mainly derived from the residual of historical usage. The study suggests that the historical OCP pollutants are persistent at high levels in this area and should not be overlooked, while we tackle emerging pollutants.

show abstract

“…It is also possibly due to the DDT application for the control of malaria in southern China. This deduction is further reinforced by the unusual high ratio of DDT/DDE since aerobic degradation may be deterred by high concentration of DDT source in the vicinity (Pereira et al, 1996).…”

Section: Organochlorine Pesticidesmentioning

confidence: 99%

Characterization of transboundary POP contamination in aquatic ecosystems of Pearl River delta

Chau

2005

Marine Pollution Bulletin

View full text Add to dashboard Cite

During the past two decades, the rapid development of the Pearl River delta leads to substantial accumulation of various toxic organic compounds. This study aims to give a preliminary characterization of the existing state of contamination in this region and to provide insight into the possible fate of persistent organic pollutants (POPs) in this estuary. The available data on POPs in water, river, estuarine sediments, soil, and marine organisms within the Pearl River Delta are compiled. It is shown that it may lead to transboundary POP pollution problems at both Hong Kong and Macau Special Administration Regions located at the downstream end of the region. It is noted that the levels of DDTs and HCHs in various environmental media are at alerting levels and that fresh DDT might still be applied illegally within the region. A systematic research is required to determine both the temporal and spatial variations of all POPs in various carrying media of the Pearl River delta as a whole.

show abstract

Distributions and fate of chlorinated pesticides, biomarkers and polycyclic aromatic hydrocarbons in sediments along a contamination gradient from a point-source in San Francisco Bay, California

Cited by 141 publications

References 20 publications

Polycyclic aromatic hydrocarbons (PAHs) in the water column and sediment core of Deep Bay, South China

Polycyclic aromatic hydrocarbons (PAHs) in the water column and sediment core of Deep Bay, South China

Atmospheric depositional fluxes and sources apportionment of organochlorine pesticides in the Pearl River Delta region, South China

Characterization of transboundary POP contamination in aquatic ecosystems of Pearl River delta

Contact Info

Product

Resources

About