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有关医学专家对学龄儿童体内含铅量做了分析观察,发现凡血液铅浓度较高的儿童,智力功能差,学习成绩不好。这与环境污染,孩子在生活中从空气、食物、水中吸收了多量的铅有关。铅,系一种有毒微量元素。铅及其化合物,以铅烟和铅尘的形式在人呼吸时通过呼吸道侵入体内,而呼吸道含的二氧化碳又遇水呈碳酸,促进了铅的溶解和吸收,并借助肺泡的扩散和交换作用,使铅迅速地被吸收进入血液。在日常生活中,通过污染的食物、水、玩具、生活用品、陶瓷器皿等,也有摄入铅的机会。而涂有各种颜色的儿童玩具,印有彩色画面的小书、报刊、图书,乃至盛食物的彩釉容器等,无疑也是儿童摄入铅的来源。铅的毒性可遍及全身各个器官。铅离子与体内氨基酸、蛋白质、酶结合,干扰了机体的正常新陈代谢
Relevant medical experts analyzed the lead content in school-age children and found that children with higher blood lead levels had poor intelligence and poor academic performance. This is related to environmental pollution, children in their lives from the air, food, water absorbed a large amount of lead. Lead, a toxic trace element. Lead and its compounds, lead and lead dust in the form of human respiratory through the respiratory tract invade the body, while the airway contains carbon dioxide in water with carbonate, and promote the dissolution and absorption of lead, and with the aid of alveolar diffusion and exchange, Lead is quickly absorbed into the blood. In daily life, there is also a chance of lead intake through contaminated food, water, toys, household items, ceramic ware, etc. Children painted with various colors of toys, small books printed with color pictures, newspapers, books, and even the food containers filled with glaze are undoubtedly the source of lead intake for children. Lead toxicity can be throughout the body of various organs. Lead ions and the body amino acids, proteins, enzymes, interfere with the body’s normal metabolism