Toxicological significance of non-, mono- and di-ortho-substituted polychlorinated biphenyls in oysters from Galveston and Tampa bays

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Environmental Toxicology and Chemistry; (United States)

DOI:https://doi.org/10.1002/etc.5620131111· OSTI ID:6811404

Sericano, J L; Safe, S H; Wade, T L; Brooks, J M ^[1]

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1. Texas A and M Univ., College Station, TX (United States)

Concentrations of non-ortho (77, 126, and 169), mono-ortho (105 and 118) and di-ortho (128 and 138)-substituted PCB congeners were measured in oysters from Galveston and Tampa bays, and reported toxic equivalent factors were used to assess their toxicity. Most of the relative toxicity encountered in the oysters analyzed during this study was due to the presence of planar non-ortho-PCBs, particularly congener 126. In contrast, the contribution of di-ortho-substituted PCB congeners to the total relative toxicity of the samples was negligible. On average, the contribution of each of these non-, mono-, and di-ortho-substituted PCB congeners to the total toxicity encountered in oysters from Galveston and Tampa bays were 126 > 118 [ge] 169 [ge] 105 > 77 [much gt] 138 > 128 and 126 > 118 > 169 [ge] 77 > 105 [much gt] 138 > 128, respectively. Based on the reported lower clearance rates of non-ortho- and mono-ortho-substituted PCB congeners compared to other congeners within the same chlorination level, contaminated oysters that are depurated in clean environments will lower their total PCB concentrations, but their original toxicity may not be proportionally reduced.

• OSTI ID: 6811404
• Journal Information: Environmental Toxicology and Chemistry; (United States), Vol. 13:11; ISSN 0730-7268
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BAYS
WATER POLLUTION
FLORIDA
OYSTERS
SENSITIVITY
POLYCHLORINATED BIPHENYLS
TOXICITY
TEXAS
BIOLOGICAL ACCUMULATION
GALVESTON BAY
ANIMALS
AQUATIC ORGANISMS
AROMATICS
ATLANTIC OCEAN
CARIBBEAN SEA
CHLORINATED AROMATIC HYDROCARBONS
COASTAL WATERS
DEVELOPED COUNTRIES
GULF OF MEXICO
HALOGENATED AROMATIC HYDROCARBONS
INVERTEBRATES
MOLLUSCS
NORTH AMERICA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION
SEAS
SURFACE WATERS
USA
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology