RISK ASSESSMENT OF CONSUMING BREAM FROM THE RYBINSK RESERVOIR

This work is a logical continuation of our research to study the content of heavy metals in the muscles of bream from areas of the Rybinsk Reservoir, which differ in the magnitude of anthropogenic load. The purpose of this study is to assess the risks associated with the duration of exposure to heavy metals (cadmium, lead, aluminum, chromium, copper, manganese, iron and cobalt) on human health when consuming bream from the Rybinsk Reservoir. Objectives: to calculate target hazard ratios based on the content of heavy metals previously detected in bream muscles. The object of the study is sexually mature, approximately the same size individuals of bream (n=40), caught by trawl from the Sheksninsk and Volzhsk reaches. Risk assessment was carried out by calculation methods of determining the target and total hazard coefficients, target and total cancer risk indexes and comparing them with acceptable limits. The results of the study indicate that there is no potential non-carcinogenic risk to human health from heavy metals, since the values of the target and total hazard coefficient for all elements were below 1. No carcinogenic risk was found for lead, however, when consuming bream meat, the risk of cancer from cadmium, aluminum and chromium is more than 1 in 100,000. The overall cancer risk index exceeds the acceptable threshold (1x10-4) and is in the unacceptable risk zone, which needs to be adjusted. The values of the studied coefficients and indices in most cases turned out to be higher in the Sheksninsk reach compared to the Volzhsk reach.