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全世界,铅的年产量约近五百万吨,被广泛应用于现代社会的各个方面,如汽油、蓄电池、管道、电缆、油漆、釉料、农药和焊药等。后者用来焊接数以千亿计的食品钖罐头。由于此类生产和使用,使人们接触和吸收来自周围空气、食品和水中的铅。有些个体,因从事铅的冶炼、精制、或因制造铅蓄电池,还在劳动场所接触额外的铅。铅的致癌性,只是最近二十年来才予以认真考虑。实验研究一致证明,铅的盐类以不同途径给予动物时,均具致癌性。但体外
Around the world, lead produces about 5 million tons of annual output and is widely used in all aspects of modern society, such as gasoline, batteries, pipes, cables, paints, glazes, pesticides and flux. The latter is used to weld hundreds of millions of canned food 钖. Because of this type of production and use, people are exposed to and absorb lead from the surrounding air, food and water. Some individuals, due to the lead smelting, refining, or manufacturing lead-acid batteries, but also workplaces contact with additional lead. The carcinogenicity of lead has only been seriously considered in the last two decades. Experimental studies have consistently demonstrated that lead salts are carcinogenic when given to animals in different ways. But in vitro