PCBs in sediments and oysters of Manila Bay, the Philippines

Abstract

Polychlorinated biphenyls (PCBs) were analyzed in sediment and oyster samples from coastal sites inside Manila Bay. Concentrations for 13 individual PCB congeners and total PCBs are reported herein. Median ∑PCB concentration in sediments was 0.46ng g-1 dry weight (range 0.10-1.5ng g -1) and in oysters it was 15ng g-1 dry weight (range 7-73ng g-1). The most contaminated areas of the bay were the coastal zones of Metropolitan Manila and Bulacan province. A significant correlation (p<0.01) was found between ∑PCB concentrations in oysters and in sediments. PCB concentrations measured in the bay sediments were below acute toxic levels to marine biota. Nevertheless, consumption of oysters by human population living around the bay might originate ∑PCB intake rates estimated at about 2.5 times lower than the tolerance limit. Further environmental surveillance is recommended in order to prevent public health risks that may be posed by these chemicals. © 2010 Taylor & Francis.

Source or Periodical Title

International Journal of Environmental Health Research

ISSN

9603123

Page

259-269

Document Type

Article

Subject

bioaccumulation, transfer with the diet, Manila Bay, polychlorinated biphenyls (PCBs), sediment quality

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