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

Journal Article · Tue Nov 01 04:00:00 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), Journal Name: Environmental Toxicology and Chemistry; (United States) Vol. 13:11; ISSN ETOCDK; ISSN 0730-7268
• Country of Publication: United States
• Language: English

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