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铅是人类认识的最古老的毒物之一 ,是一种很难降解的污染物。近年来随着科学技术水平的提高和对疾病认识的深入 ,人们发现铅对高级神经功能的影响特别是对婴幼儿脑功能的影响和远期效应 ,似乎没有浓度下限。流行病学的研究表明 ,环境中铅对儿童智力和中枢神经系统的正常发育存
Lead is one of the oldest known human poison, is a very difficult to degradation of pollutants. In recent years, with the improvement of science and technology and the deepening understanding of diseases, it is found that there is no lower limit of concentration in the effects of lead on advanced neurological functions, especially on infant brain function and long-term effects. Epidemiological studies have shown that the environment of lead to children’s normal intelligence and central nervous system development