Studying the effects of Pb contamination on ADHD occurrence in primary school students in Tehran

Document Type : Research Paper


Azad University


Studying the effects of Pb contamination on ADHD occurrence in primary school students
in Tehran

Increasing human population growth along with the urbanization and industrialization of societies, along with their benefits, have caused disadvantages such as increasing environmental pollutants. Among these pollutants are heavy metals such as lead, which have numerous effects on humans, especially children and the elderly, which have been reported in numerous studies. Due to the fact that lead is one of the metals that affects the nervous system, numerous studies have been conducted on the psychological effects of these metals, especially in children.
In this study, the concentration of this metal in the nails of normal children and children with ADHD syndrome was studied. After completing the questionnaires, 30 children with ADHD syndrome and 30 normal children regardless of gender were selected. Nail samples were prepared from these children and after acid digestion, the concentration of metals was measured by atomic absorption. The results showed that the mean concentration of lead in children's nails was 23.63.5 μg / g. Based on the results of the effects of increasing the concentration of lead in the nail, ADHD syndrome was increased in children. Therefore, the lead element can be one of the factors involved in the occurrence of ADHD and the necessary measures in this regard must be taken.


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