一、重金属污染中毒重金属是指密度比较大的金属,如铅、锰、锌等。中毒鱼类鳃部呈灰白色,并分泌大量粘液,形成絮状沉积物,使鱼鳃阻塞,引起呼吸障碍,中毒鱼类常在水表层浮游。鱼类铅中毒,体色明显呈黑色。鱼类铜中毒,体色呈灰白色,鳃丝呈浅绿色。二、五氯酚钠污染中毒五氯酚钠是最常见的一种有机氯化合物,主要用 First, heavy metal pollution Heavy metal refers to the density of relatively large metals, such as lead, manganese, zinc and so on. Poisoned fish gills gray, and secrete a large number of mucus, the formation of flocculent sediment, the fish gills obstruction, causing respiratory disorders, poisoning fish often floating in the water surface. Lead poisoning in fish, body color was black. Fish copper poisoning, body color is gray, gill filaments were light green. Second, sodium pentachlorophenol poisoning Sodium pentachlorophenate is the most common kind of organic chlorine compounds, the main use