稀土元素日允许摄入量与农用安全性探讨

Acceptable Daily Intake and Agricultural Safety Evaluation of Rare Earth Elements

稀土农用是我国独立开创的稀土应用领域,30年来,取得了巨大的经济效益。然而,作为元素周期表中第ⅢB主族的重金属,稀土元素不是动植物的必需微量元素,其生理效应的机制还不清楚,稀土农用的安全性问题一直受到密切的关注。本文从稀土元素分析方法与人均总膳食摄入量、稀土元素毒理实验方法与日允许摄入量、稀土农用对土壤中稀土元素含量和化学形态的影响、以及稀土农用对食物中稀土元素含量影响的4个方面,对文献报道作了分析、整理和评定,结论是只要对使用的范围、剂量及施用方式进行限制,稀土农用是一种安全的农业增产方式。

Application of rare earth elements(REEs)in agriculture is a new application area of REEs created by China.In the past 3 decades,remarkable ecnomic benefits have been obtained.However,as a series of heavy elements in ⅢB of the periodic table,REEs are not essential elements of plants and animals.The mechanism of REE physiological effects is still unknown and the safety issue of REE agricultural use has attracted wide attention.A review with 58 references is given on acceptable daily intake and agricultural sa...