Exposure and carcinogen risk assessment to human beings caused by Cd in Pearl River Basin

摘要

Potential cancer risk to human beings caused by Cd, in Pearl River Basin was investigated based on the USEPA guidelines for carcinogen risk assessment. The risk sources, exposure media and pathways, as well as the risk contribution from each component, were analyzed through the multi-media/multi-pathway human exposure model, Results showed that the daily exposure doses of Cd of residents in Pearl River Basin were 2.36xlCT~(-4) mg/(kg?d), which was englobed mainly by oral intake. The total cancer risk was 8.99 x10~(-5) that was higher than the acceptable cancer risk level (l x 10~(-6)). Rice and vegetables were the major exposure media.