废水中氰化物氧化水解反应研究

本文研究含氰废水在常压回流条件下的氧化水解反应,以氰化钾溶液试验,证明氰化物在常压回流条件下的氧化水解反应符合一级反应动力学规律,进而测定了不同pH下氰化钾溶液及含氰造气废水氧化水解反应的速率常数。在不同铁氰比条件下,对氰化物氧化水解反应进行了理论分析和实际试验,证明在一定量亚铁离子存在下,可通过控制适当的处理液pH来提高氰化物氧化水解反应速度,也可按原来的pH,用调节亚铁离子浓度的方法来提高氰化物的氧化水解反应速度,从而为提高含氰造气废水处理效率提供了新的途径和理论依据。

Study on Oxidation and Hydrolysis of Cyanides in Wastewater

The aim of this work is to explore oxidation and hydrolysis of cyanides in wastwater under the condition of normal atmospheric reflux. Taking potassium cyanide as an example, the test has separated oxidation of the cyanidae from hydrolysis, and proved that both. of oxidation and hydrolysis unler the said condition will identify themselves with the first-order reaction tinectics, thus determined the constant of reaction rate under different pH values. The theoretical analysis and practical experiment has also proved that reaction rate of oxidation and hydrolysis of cyanides in the presence of a certain amount of ferrous ions pcan be increased by controlling adequate pH in the solution or by adjusting the concentration of ferous ions at the primary pH of the wastewater. So a new approach to raising treatment efficiency of cyanide-bearing wastewater in coal gasification is provided.