前言重金属指的是原子质量大于5克每立方厘米的金属元素,包括镉(Cd)、铬(Cr)、汞(Hg)、铅(Pb)、铜(Cu)、锌(Zn)、银(Ag)、锡(Sn)、砷(As)等。重金属元素存有毒性,加之特殊的理化性质,其具有难以降解、易于在生物体内富集的生态学特点,是 Introduction Heavy metals refer to metallic elements with an atomic mass of more than 5 grams per cubic centimeter, including cadmium, chromium, mercury, lead, copper, zinc, Ag), tin (Sn), arsenic (As) and the like. Heavy metals are toxic, combined with special physical and chemical properties, it has the characteristics of being difficult to degrade, easy to enrich in the body’s ecological characteristics, is