Polychlorinated biphenyls in a grassland food network: Concentrations, biomagnification, and transmission of toxicity

The production of polychlorinated biphenyls (PCBs) is prohibited by the Stockholm Convention in 2001, but the unintentionally produced PCBs are still continuously discharged into the environment. In this study, the distributions, biomagnification and toxicity amplification in a grassland food networ...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:The Science of the total environment Ročník 709; s. 135781
Hlavní autori: Te, Bu, Yiming, Liu, Tianwei, Li, Huiting, Wang, Pengyuan, Zhao, Wenming, Chen, Jun, Jin
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Netherlands Elsevier B.V 20.03.2020
Predmet:
Animals
Bioaccumulation
detection limit
Food Chain
Grassland
Grassland ecosystem
grasslands
lipids
Magnification
Mice
muscles
PCBs
Polychlorinated Biphenyls
Snakes
subcutaneous fat
Toxicity
Transfer
trophic levels
Transfer
PCBs
Grassland ecosystem
Magnification
Toxicity
ISSN:0048-9697, 1879-1026, 1879-1026
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:The production of polychlorinated biphenyls (PCBs) is prohibited by the Stockholm Convention in 2001, but the unintentionally produced PCBs are still continuously discharged into the environment. In this study, the distributions, biomagnification and toxicity amplification in a grassland food network (including inorganic environment, animals and vegetation) were investigated. PCB concentrations in various samples were determined, and PCBs appeared to be enriched as the trophic level increased. The PCB concentrations in the inorganic environment samples ranged from below the detection limit to 0.329 ng g−1, and the PCB concentrations in vegetation were 0.0829–4.45 ng g−1. The PCB concentration in snake subcutaneous fat (8.74 ng g−1 lipid weight) was higher than the concentrations in other animal samples, and the next highest concentration was found in yellow weasel muscle (7.31 ng g−1 lipid weight). Biomagnification factors were calculated for different PCBs and different organisms. Biomagnification was most obvious for organisms at the top of the food chain (the snake/mouse biomagnification ratio was >1000). The PCB-126 toxic equivalent concentration increased markedly as the trophic level increased. The toxic equivalent concentrations were 1200 times higher for high trophic level biota than low trophic level biota. PCB-169 had the highest toxic equivalent concentrations for the animal hair samples (0.00001 pg toxic equivalents g−1). However, PCB-81 had the highest toxicity equivalent concentrations for the herdsmen hair samples. PCBs found at relatively low concentrations and low toxic equivalent concentrations at low trophic levels can be biomagnified as they are transferred through the food chain and can reach high actual and toxic equivalent concentrations at high trophic levels. [Display omitted] •PCBs appeared to be enriched as the trophic level increased.•Snake/quarry had BMFs as high as 5000 for PCB-114, -156, and 169.•Up-PCBs (PCB-126, 169) had the highest TEQ concentrations in the organisms.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2019.135781