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砷是存在于自然界各种金属矿中的一种类金属,元素砷本身无毒,主要以各种砷化物的形式经呼吸道、消化道、皮肤进入体内引起人体中毒。砷是一种细胞原生质毒,在体内砷是亲硫元素,易与巯基结合从而引起人体代谢受限或紊乱,可引起急慢性砷中毒。生产环境中砷通常以三氧化二砷(As2O3)、其他砷化合物的烟雾或粉尘形式存在,职业性砷接触主要经呼吸道或经口摄入,亦可通过完整皮肤、粘膜或创面或消化道吸
Arsenic is a kind of metalloid existing in various metal ores in nature. Elemental arsenic itself is non-toxic and mainly enters the body through the respiratory tract, digestive tract and skin in the form of various arsenic compounds to cause human poisoning. Arsenic is a cell prototoxin, arsenic in the body is a pro-sulfur element, easy to combine with the sulfhydryl to cause the body’s metabolism is limited or disorder, can cause acute and chronic arsenic poisoning. In the production environment, arsenic is usually found in the form of smoke or dust of arsenic trioxide (As2O3) and other arsenic compounds. Occupational arsenic exposure is mainly obtained through the respiratory tract or oral intake and also through intact skin, mucous membrane or wound or digestive tract