Use of ozone in the treatment of cyanide containing effluents
Use of ozone in the treatment of cyanide containing effluents
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使用臭氧处理含氰化物废水
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
R. Perez
中科院分区：
文献类型：
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作者：
F. Nava;A. Uribe;R. Perez
金银氰化工艺废水的处理是贵金属行业面临的主要问题之一。这些废水含有不同数量的游离氰化物、弱络合氰化物、强络合氰化物和硫氰酸盐。使用不同的方法来去除氰化物，但大多数时候试剂的消耗将操作成本提高到难以承受的水平，并且还可能形成有毒的残留副产物。臭氧是氧化氰化物的替代气体，具有多种优点；然而，由于缺乏有关这些化合物与臭氧反应的信息，推迟了其在氰化废水处理中的工业应用。本文总结了 CINVESTAV 1996 年至 2001 年间开展的利用臭氧处理氰化废水的研究工作。结果显示了游离氰化物氧化和氰化铜配合物的化学计量。还介绍了 pH、温度和臭氧添加速率对氰化物氧化速率的影响。 © 2003 SDU。版权所有。
The treatment of effluents of the gold and silver cyanidation process is one of the main problems that the precious metals industry faces. These effluents contain variable quantities of free cyanide, weak complexed cyanide, strong complexed cyanide and thiocyanate. Different methods are used for the removal of cyanide but most of the times the consumption of reagents raises the operation cost to unaffordable levels, and there exists as well the possible formation of residual by-products that are also toxic. Ozone is an alternative gas for oxidation of cyanide compounds that presents several advantages; however the lack of information on the reactions of these compounds with ozone has delayed its industrial application in the treatment of cyanidation effluents. This paper summarizes the research work developed at CINVESTAV between 1996 and 2001 to study the use of ozone to treat cyanidation effluents. Results are presented on the stoichiometry of free cyanide oxidation and copper cyanide complexes. The effects of pH, of temperature and of ozone addition rate on the cyanide oxidation rate are also presented. © 2003 SDU. All rights reserved.