污染区人群砷累积暴露量及与砷中毒的关系砷污染区人群砷累积暴露量的估计

利用人群流行病学调查资料 ,通过估计人群累积呼吸量和大米食用量的方法 ,估算了污染区人群经呼吸和饮食的累积砷暴露量。并对如何评价人群环境污染物暴露水平的方法进行了探讨。不考虑非污染期经呼吸道的砷暴露时 ,所估计的污染区人群最大累积砷暴露量 ,经呼吸道途径 ,女性为 5 91 4mg ,男性为6 12 9mg。消化道途径为 34 88 74mg,合计女性为 40 80 14mg ,男性为 410 1 6 6mg。按污染时间折算成每日暴露量 :女性为 34 9 1μg (天·人 ) ,男性为 35 0 9μg (天·人 ) ,约为调查时所计算日均暴露量的 80 %左右

Correlation of arsenic accumulative intake and its health effects to the residents in arsenic polluted area Estimation of arsenic accumulative intake level of residents living in arsenic polluted area

In order to evaluate arsenic accumulative intake level of residents living in an area with arsenic pollution in the air, the level of arsenic accumulative intake is measured by calculating residents' accumulative rice consumption and the measurement of the level via inhalation. The resnlts show that ignoring the non-polluted time periods, the highest arsenic accumulative intake level (AAIL) appears in residents aged 50 and above who have the highest level of air inhalation and rice consumption in comparison with young residents after 32 years exposure, and their AAIL detected via inhalation are 591.4 mg for female and 612.9 for male respectively. There is 3488.74 mg arsenic obtained by their daily diet. Total AAIL are 4080.14 mg for female and 4101.66 mg for male respectively, being about 80% of estimation level reflected by daily exposure level multiplied by total exposure time (day).