摘要
目的了解陕西省食品中铅污染状况,并进行膳食暴露量及健康风险评估。方法测定11大类4612份食品和58份生活饮用水中的铅含量,采用国标限量值、原每周可耐受摄入量(PTWI)、暴露边界比(MOE)和个人年风险(R_(ig)~n)分别评价污染程度、膳食暴露量及健康风险。结果食品中铅含量均值为0.0461 mg/kg,超标率为2.18%,生活饮用水中铅含量均值为0.0005 mg/L,无超标样品。陕西省居民平均每周经食品摄入铅的量为4.45μg/(kg·BW),占原PTWI的比例为17.80%,摄入铅的平均MOE为1.89。膳食中铅主要来源为谷物、蔬菜、调味品(占88.32%)。铅的平均个人年风险为6.49×10^(-5)/年,大于国际辐射防护委员会(ICRP)的最大可接受值5×10^(-5)/年。结论陕西省食品存在一定程度的铅污染,居民经食品途径铅暴露量基本处于安全水平,但存在健康风险,应进一步降低食品中铅含量。
Objective To understand the contamination level of lead in foods and drinking water,and to assess the daily intake of lead and the possible adverse health impact.Methods The concentrations of lead in 4612 samples of foods and 58 samples of drinking water were measured.National standard were used to evaluate the degree of pollution,and provisional tolerable weekly intake（ PTWI） and margin of exposure（ MOE）were used to estimate lead reveals amounts,and carcinogenic risks was used to evaluate the health risk,respectively.Results The average content of foods and drinking water were0.0461 mg/kg and 0.0005 mg/L,respectively,while the violation rates were 2.18% and0%.The average weekly exposed levels of lead of Shaanxi Province residents were4.45μg/（ kg BW）,which accounted for 17.80% of provisional tolerable weekly intake（ PTWI）.And the mean MOE value of lead was 1.89.The main sources of dietary lead were cereals,vegetables and condiment,which covering 88.32% of total lead.The individual health risk of lead was 6.49×10-5（ a-1）,which higher than the standard of ICRP（ 5×10-5a-1）.Conclusion There is certain degree lead pollution in foods in Shaanxi Province.The exposed levels of lead through foods of Shaanxi Province residentsare safety,but the health risk is high.
出处
《卫生研究》
CAS
CSCD
北大核心
2016年第6期988-992,共5页
Journal of Hygiene Research
基金
陕西省社会发展科技攻关项目(No.2016SF-292)
关键词
食品
铅
风险评估
膳食暴露
健康风险
饮用水
foods
lead
risk evaluation
dietary exposure
health risk
drinking water
