目前,稀土元素被广泛应用于冶金、石油化工、玻璃陶瓷、电子光学材料、磁性

At present, rare earth elements are widely used in modern science and technology fields such as metallurgy, petrochemical industry, glass ceramics, electron optical materials, magnetic materials, medicine and so on. During the development and smelting of rare earth resources, due to inadequate supervision, illegal mining, backward technology, and "three wastes" discharge and other reasons, the surrounding water bodies and soil rare earth elements, heavy metals and leach reagents as well as rare earth pollution in the atmosphere are relatively serious. Studies have shown that the average IQ, memory, attention and reasoning ability of children in rare earth mining areas are significantly lower than that in the control area, indicating that rare earth has an effect on brain function, revealing that long-term low concentration intake of rare earth may be harmful. Among all rare earths, lanthanum (La) is the most typical and widely used. Lanthanum can enter the human body through the blood-brain barrier and damage the ultrastructure of hippocampus and cortical neurons, thereby reducing the learning and memory ability of animals.

目前,稀土元素被广泛应用于冶金、石油化工、玻璃陶瓷、电子光学材料、磁性材料、医药等现代科学技术领域。在稀土资源的开发和冶炼过程中，由于监管不到位、非法开采、工艺落后、“三废”排放等原因，导致矿区周边水体和土壤稀土元素、重金属和浸矿剂以及大气中稀土污染比较严重。有研究表明，稀土矿区儿童智商均数、记忆力、注意力及推理能力均明显低于对照区, 说明稀土对大脑功能有影响, 揭 示长期低浓度摄入稀土可能是有害的。所有稀土中，最典型且应用最广泛的是镧( La)。镧可透过血脑屏障，进入人体，损害海马和皮层神经元超微结构，进而降低动物的学习记忆能力。

At present, rare earth elements are widely used in modern science and technology fields such as metallurgy, petrochemical industry, glass ceramics, electronic optical materials, magnetic materials, medicine, etc. During the development and smelting of rare earth resources, due to inadequate supervision, illegal mining, backward technology, and "three wastes" discharge, the pollution of rare earth elements in water and soil, heavy metals and leaching agents around the mining area and rare earth in the atmosphere are relatively serious. Some studies have shown that the intelligence quotient, memory, attention and reasoning ability of children in rare earth mining area are significantly lower than those in the control area, indicating that rare earth has an impact on brain function, revealing that long-term low concentration intake of rare earth may be harmful. Lanthanum (LA) is the most typical and widely used rare earth. Lanthanum can enter human body through blood-brain barrier, damage the ultrastructure of hippocampal and cortical neurons, and then reduce the learning and memory ability of animals.