中文摘要：

通过野外取样调查和室内ICP-MS测定,研究了福建省长汀县稀土矿区蔬菜地土壤（0～20 cm）及主要蔬菜中稀土元素的含量,同时评价了食用蔬菜对人体可能产生的健康风险.结果表明,蔬菜地土壤中稀土元素平均含量高于福建省背景值,芋头和空心菜中稀土元素的平均含量分别为3.68和0.92 mg.kg-1（鲜重）,超过了蔬菜卫生标准限值（0.7 mg.kg-1）.8种蔬菜中稀土元素含量的大小：芋头〉空心菜〉生菜〉上海青〉豆角〉茄子〉白萝卜〉大白菜;除芋头外,一般为多叶绿色蔬菜的稀土元素含量较高,而无叶蔬菜含量较低.矿区居民血液和头发中稀土元素的平均含量高于正常人,超标量达155.6和9.6倍,井水中稀土元素的平均含量是福州市饮用水的119倍.当地居民通过蔬菜和井水摄入的稀土元素终生日平均量为12.4699 mg.kg-.1d-1,超过稀土对人体亚临床损害剂量的临界值（6.0～6.7 mg.kg-.1d-1）,当地居民面临着较大的健康风险.部分蔬菜对土壤中稀土元素具有较大的吸收和累积量,因此,当地居民应选择具有低积累量的蔬菜品种,以降低稀土元素对人体健康的危害.

英文摘要：

Concentrations of rare earth elements （REEs） in cultivated soils and eight vegetables from a mining area in Changting County of Fujian Province were surveyed. The concentrations of REEs of cuhivated soils exceeded the soil background value of Fujian Province, while the concentrations of REEs of taro （3.68 mg·kg^-1·d^-1 fresh weight） and water spinach （0.92 mg·kg^-1·d^-1 ） exceeded the maximum permissible concentration of REEs in vegetables （0.7 mg·kg^-1·d^-1 ） in the NFHSC. The concentrations of REEs of the eight vegetables declined in the order of taro 〉 water spinach 〉 lettuce 〉 pakchoi 〉 long bean 〉 eggplant 〉 white radish 〉 Chinese cabbage. REE concentrations of leafy vegetables were higher than those of the non-leafy vegetables. REE concentrations in local resident＇s blood and hair were 155.6 and 9.6 times higher than those of the general population, respectively. The average concentrations of REEs in well water from the mining area were 119 times higher than those in the drinking water of Fuzhou City. The average daily intake of REEs of local inhabitants was estimated to be 12.5 mg·kg^-1·d^-1, exceeding values harmful to human health （6.0 - 6.7 mg·kg^-1·d^-1 ）. The local inhabitants were threatened by health risks due to high REE exposure from vegetable consumption. Some vegetables had greater concentrations of REEs than others, therefore local farmers should choose vegetables with low REE concentrations for reducing health risk associated with high intake of REEs.