摘要
对我国有代表性的3种类型稀土矿区内农民自然生活环境(耕地土壤、饮用井水、天然植物和植物性食物)和头发中稀土含量进行了卫生学调查研究,初步了解了其稀土暴露、吸收和蓄积水平。结果表明:稀土矿区内,除耕地土壤中稀土含量(680—1200mg/kg)明显高于对照地区、某些天然植物有富积稀土(16.8—57.2μg/g)的能力外,浅井水(2.6—21.0μg/L)、粮食<(0.05—3.15μg/g)和蔬菜(0.06—1.82μg/g)中稀土含量仅是稍高于对照地区趋势;矿区农民平均每人每日稀土经日摄入量估计值〔(498.3—1708.1μg/(d·人)]与相应对照点基本一致;仅江西轻稀土矿观察点[(659.4μg/(d·人)]稍高于对照点[498.3μg/(d·人)]。江西2矿区内农民发中稀土含量(0.53—15.02μg/g)均显著高于本地区对照点以及山东稀土矿区内农民发稀土水平(<0.20—1.12μg/g,P<0.05),并接近或超过山东稀土矿矿工水平(0.43—8.76μg/g,P<0.05),但其平均每人每日稀土经日摄入量明显低于山东矿区农民摄入水平[1708.lμg/(d·人)]。江西离子吸附型稀土矿区内?
n order to get a preliminary estimation of RE exposure and absorption(or accumulation) levels of inhabitants living in RE mining areas, RE contents of natural environment (including soil of cultivated land, well water, natural plants,vegetables and cereals) and head hair of farmer's living in three representative RE mining areas in China were examined. All samples were analyzed for RE content by spectrophotometric method.Results show that RE levels of soil samples from RE mining areas(680-1200 mg/kg) were obviously higher than those from control areas. Some natural plants are capable of accumulating RE(16.8-57.2μg/g). However, RE levels of shallow well water(2. 6-21.0μg/g), cereals(0.05-3.15μg/g) and fresh vegetables(0. 06-1. 82 g/g) from RE mining areas had only a trend of slight increase. The estimated amount of average daily RE intake person(REEADI) (554. 1-1708. 1μg/d. person) of farmer's in RE mining areas were almost the same as those of farmer's in control areas, but RE EADI of farmer's of the two RE mining areas of southern China(554. 4-659.4μg/d. person)were lower than that of the RE mining area of northern China(1708. 1μg/d. person). On the contrast, RE levels of head hair samples from RE mining areas of southern China(0.53-15.02 μg/g) were significantly higher than those of samples from control areas, and also markedly higher than those(0. 20-1. 12μg/g) from RE mining area of northern China. Reasons leading to the differences in head hair RE contents among these mining areas were discussed. Hypothesis and suggestions were made. It was concluded that RE exposure and/or absorption levels of farmer's living in the two RE mining areas of southern China were markedly increased. They should be regarded as RE highly exposed groups.
出处
《环境科学》
CSSCI
CSCD
北大核心
1995年第4期78-82,共5页
Environmental Science
基金
国家攻关项目
关键词
稀土元素
土壤
水
天然食物
环境卫生学
毛发
rare earth elements
soil
well water
natural plant
human head hair
estimated exposure dose
highly exposed group.