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铝是地壳中元素含量最高的金属,占地壳总量的7％。由于它的许多优良理化性能,广泛应用于军事,工业,医药及日常生活中,铝的产量与日俱增,它已对环境造成严重污染。目前,人体铝含量已比古代人增多了一倍以上。 早期,人们认为,铝既不被人体胃肠吸收,也无毒性,所以有人将铝列入无害微量元素。近几年的研究证明,人的肠壁对铝的屏障作用并不完全,当摄入过多的铝以后,吸收及滞留的铝增多,血清铝含量增高。老年
Aluminum is the metal with the highest content of elements in the earth’s crust and accounts for 7% of the total crust. Due to its many excellent physical and chemical properties, widely used in military, industrial, pharmaceutical, and daily life, aluminum production is increasing day by day. It has caused serious environmental pollution. At present, the aluminum content of human body has more than doubled than that of the ancient people. In the early days, people believed that aluminum was not absorbed by the human body and it was not toxic, so some people included aluminum as a harmless trace element. Studies in recent years have demonstrated that the barrier function of the human intestinal wall to aluminum is not complete. When excessive aluminum is ingested, the amount of aluminum absorbed and retained increases, and the serum aluminum content increases. elderly