Correlations between dioxin - like and indicators PCBs : potential consequences for 2 environmental studies involving fish or sediment
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Correlations between dioxin-like and indicators PCBs: potential consequences for environmental studies involving fish or sediment.
Among the numerous PCB congeners, most of the dioxin-like PCBs (DL-PCBs) need to be characterized by hyphenated techniques. It has been shown in several instances that these congeners are well related to the total PCB content in fish. We examined datasets collected mainly in France, on freshwater and marine fish and sediments. A statistical model linking DL- and indicator PCBs was developed for...
متن کاملTemporal Trends of PCDDs/DFs and Dioxin-Like PCBs in the Preserved Fish Samples from 1953 to 1999
Introduction Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/DFs) are not manufactured on deliberate purpose; however, these toxic compounds are chemical impurities, unintentional by-products of industrial processes involving chlorine, or burning of organic matter in the presence of chlorine. On the other hand, dioxin-like polychlorinated biphenyls (non-orthoand mono-ortho-substitute...
متن کاملLong-term food-exposure of zebrafish to PCB mixtures mimicking some environmental situations induces ovary pathology and impairs reproduction ability.
Although the use of polychlorinated biphenyls (PCBs) has been banned for several decades, they are still present in the environment and are occasionally mechanically released from sediment or transferred through the trophic chain. Field analyses have established correlations between exposure to PCBs and alterations in fish physiology including reproductive function. Experimental exposures have ...
متن کاملBiotransfer of persistent organic pollutants from a large site in China used for the disassembly of electronic and electrical waste.
Samples of groundwater, river water, river sediment, paddy soil, rice seeds, hen eggs, fish, umbilical cord blood, and newborn meconium were collected from October 2002 to October 2003 near a large site in China used for the disassembly of obsolete transformers and other electronic or electrical waste. Six indicator PCB congeners, three non-ortho dioxin-like PCB congeners, and six organochlorin...
متن کاملComposition of dioxin-like PCBs in fish: an application for risk assessment.
It is widely accepted that a congener-specific analysis of polychlorinated biphenyls (PCBs), rather than traditional Aroclor equivalent total PCB analysis, is required for risk assessment. This is based on the fact that environmental processes alter the original distribution of PCB congeners in Aroclors and that toxicity varies considerably among the congeners with dioxin-like PCBs (dl-PCBs) ge...
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