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13952672605

技術文章

Technical articles

當前位置：首頁技術文章重金屬污染--鉛

重金屬污染--鉛

更新時間：2013-05-17點擊次數：4957

 主要重金屬：鉛   

主要來源：汽車尾氣       

主要危害：鉛在廢氣中呈微粒狀態，隨風擴散，可隨呼吸進入血液，并迅速地蓄積到人體的骨骼和牙齒中，它們干擾血紅素的合成、侵襲紅細胞，引起貧血；損害神經系統，嚴重時損害腦細胞，引起腦損傷。當兒童血中鉛濃度達0.6～0.8ppm時，會影響兒童的生長和智力發育，甚至出現癡呆癥狀。鉛還能透過母體進入胎盤，危及胎兒。    

防范措施：多年生活在大城市的人們，24小時都要呼吸這里的空氣，如果天天戴口罩并不現實，可多吃牛奶、豆制品、木耳、大蒜等有利于排鉛的食物。在交通干線兩側100米范圍內，大氣中含鉛量、土壤中含鉛量和蔬菜葉片中含鉛量均比較高，污染較嚴重，稱“鉛污染區”。故而應盡量避免在馬路附近散步。     

更嚴重的受害者：*、司機、兒童。兒童排鉛能力差，汽車尾氣是zui主要的毒源。

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