贵州大米总汞富集及人体健康风险评价

Guizhou Total Mercury Concentration of Rice and Human Health Risk Assessment

贵州省农业土壤中汞(Hg)的含量相较于全国表现较高。针对贵州农业土壤中汞含量较高这一特点,调查贵州当地产大米中汞富集污染状况及对人体健康的风险评价,为贵州省的食品风险监测管理提供科学依据。在贵州省9个地区的部分市场采集样品,选取的样品为采样地区所出产的当地大米,之后根据GB/T 5009.17-2003中的原子荧光光谱分析法,对大米中的汞含量进行检测。再采用美国环保署的健康风险模型评价法对样品中大米重金属汞元素的含量的健康风险进行评价。结果表明,采集的大米样品中汞含量最大值为0.024 4 mg/kg,超标率为4.85%,未检出为22个。汞健康危害的个人终身风险系数为1.97×10-3,属于一级风险,即轻度风险,不会对人群构成明显的危害。

The mercury content of cultivated land is higher than other provinces in China. An investigation of the total mercury concentration of rice in Guizhou and human health risk assessment was done for the high level of mercury in agricuhural soil in Guizhou. This result can pro- vide a scientific basis of food risk inspection management in Guizhou. The samples were detected from 9 zone in Guizhou and all the samples were local rice. The concentration was detected by the atomic fluorescence spectrometry according to GB/T 5009.17 - 2003, and the U. S. EPA ＇ s health risk assessment model was used in the research. The results indicate that a maximum of 0. 024 4 mg/kg in the rice samples can be detected, and the exceeding rate is 4.85%, and no mercury can be found in 22 samples. Personal health hazards of mercury lifetime risk factor is 1.97 × 10^-3, which belong to the first level risk （weak risk）. It pose no risk to the exposure population.