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Abstract
Detoxification of Semen Armeniacae Amarum requires large amounts of water, and the detoxifying wastewater contains highly toxic hydrocyanic acid. This paper aims to explore the recovery of water after the removal of cyanide from it by chemical precipitation. The results show that when the dosage of ferrous sulfate is 1.76 times of the theoretical value, the cyanide removal in water can be reduced to about 2.70×105mol/L, the hydrocyanic acid in Semen Armeniacae Amarum can be entirely removed when the treated water is recycled.
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