Abstract
The concentration levels, toxic equivalency (TEQ) concentrations, and carcinogenic and non-carcinogenic risks of dioxin-like polychlorinated biphenyls in shore soil from the 40 national key monitoring sections along the entire Yellow River were comprehensively studied. The results showed that the concentrations of ΣDL-PCBs in the soil were between 0.37-7.17 ng·g-1 (dry weight), and the mean value was 0.38 ng·g-1 (dry weight). The TEQ concentrations of DL-PCBs in the soil were between 0.00-30.31 pg·g-1 (dry weight), and the mean value is 13.63 pg·g-1 (dry weight), posing no significant risk to the ecological environment and human health. The carcinogenic and non-carcinogenic risks of DL-PCBs in this study did not exceed the limits set by the USEPA, and there were no obvious health risks. The residents in the middle reaches of the Yellow River were more vulnerable to DL-PCBs.
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