What are the risks of arsenic-containing fumes to humans?

　　Mining and metallurgical activities are large sources of arsenic emissions to the environment. The amount of arsenic-containing gases and liquids in the smelting process of non-ferrous metals is small, and arsenic-containing fumes are the main form of solid arsenic emissions. So, what are the hazards of arsenic-containing fumes to human body?

　　What are the hazards of arsenic-containing fumes to human body?

　　1, long-term intake of low-dose arsenic compounds can lead to chronic arsenic poisoning and neurasthenia syndrome. Mostly manifested as polyneuritis, such as sensory dullness, numbness of the limbs, and even loss of consciousness, mobility difficulties, movement disorders, etc.. Some fish, seafood, cereals and processed grain products may contain some amount of arsenic. Frequent consumption of food containing arsenic may lead to arsenic poisoning over time.

　　2、Epidemiological studies show that long-term exposure to arsenic has a clear causal relationship with the occurrence of skin cancer and lung cancer, and is closely related to the occurrence of bladder cancer and other visceral cancers. Systemic disease, mainly skin damage, manifested as dry and rough skin, brittle and easy hair loss, thickened and keratinized skin of palms and toes, followed by skin cancer. The latency period of cancer is 30 to 50 years. In our daily life, some small informal cosmetic workshops often add drugs to whitening, whitening and spot removal products.

　　3、Due to the nature of their work, some people may be exposed to arsenic in large quantities by chance, which can lead to acute arsenic poisoning, mainly damaging the gastrointestinal system, respiratory system, skin and nervous system. The symptoms are fatigue, vomiting, yellowing of the skin, headache and even coma. In severe cases, symptoms are neurological abnormalities, respiratory distress, heart failure, and death.

　　What is the method to treat the exhaust gas containing arsenic and arsenic compounds by arsenic-containing fumes?

　　1、Firstly, remove the oil and gas contained in the exhaust gas.

　　2、Secondly, the exhaust gas is bubbled by passing it below the liquid level of a mixed solution containing 1%-5% H2O2 SO4 solution and saturated KIO3 and KI solution.

　　3、The exhaust gas overflows from the mixed solution and enters the first stage reverse spraying device from bottom to top, where the mixed solution is sprayed from top to bottom and comes into contact with the exhaust gas to absorb the arsenic and arsenic compounds in the exhaust gas.

　　4、The exhaust gas is introduced into the second stage reverse spray device for bottom-up movement, and the treatment solution containing 1%~5% h2so 4 and 1%~5% cuso 4 solution is sprayed in the second stage reverse spray device from top-down to contact with the exhaust gas to treat the exhaust gas.

　　5、After that, the exhaust gas is introduced into the third stage counter-jet device for bottom-up movement, and the treatment solution containing 1%~5% kmno 4 and 1%~5% NaOH solution is sprayed in the third stage counter-jet device from top to bottom to contact with the exhaust gas and treat the exhaust gas.

　　6. Then, the exhaust gas is discharged.