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汞通过与生物体内半胱氨酸强烈的亲合作用而被生物体摄取,造成累积中毒,引起神经功能障碍。天然水中一般含汞量为0.01—0.7微克/升,鱼体中汞的富集系数达1000—2000,从而通过食物链对人体造成危害。另外,化工、冶炼排水中也往往含有汞而污染水体。汞在水体中的化学行为大致以无机汞(Hg~(2+))和有机汞(RHg~+)两类反应系统进行。无机汞通过微生物作用,容易转化成甲基汞。有机汞在紫外线照射下能变为无机汞。有人提及,甲基汞的毒性是无机汞的100倍,因此,需要分离和测
Mercury in vivo by strong affinity with cysteine and organisms are taken up, resulting in cumulative poisoning, causing nerve dysfunction. The general mercury content in natural waters is 0.01-0.7 μg / L, and the enrichment factor for mercury in fish is 1000-2000, which will harm the human body through the food chain. In addition, chemical, smelting drainage also often contain mercury and pollute the water. The chemical behavior of mercury in water is roughly based on two types of reaction systems: inorganic mercury (Hg 2+) and organic mercury (RHg +). Inorganic mercury through the role of microorganisms, easy to convert methylmercury. Organic mercury can become inorganic mercury when exposed to UV light. It was mentioned that methylmercury is 100 times more toxic than inorganic mercury and therefore needs to be separated and measured