Removal of heavy metals and cyanide from gold mine waste-water by adsorption and electric adsorption
发布时间：2024-08-09
点击次数：
- 所属单位：
- 化学与化工学院
- 发表刊物：
- Journal of Chemical Technology and Biotechnology Advances(SCI)
- 关键字：
- 中文关键字：无，英文关键字：removal; heavy metal;cyanide; electric adsorption
- 摘要：
- Abstract Background Cyanide leaching is the most widely used technology in the gold industry and this process produces large amounts of waste-water requires treatment before returning to the environment there are several established techniques available to treat such toxic waste but all have some disadvantages. This study considers the use of electrical adsorption treatment of a gold mine waste-water containing cyanide, high copper, iron, and thiocyanate, as well as the precipitating liquid without iron. Results A cell fitted with carbon electrodes made from low grade coal was used in this study and using an applied voltage of 2.0V, plate spacing of 1cm, and adsorption time of 24 h, the electric adsorption process provided good results on the barren cyanide waste-water with observed percentage removal of total cyanide (71.14), zinc (99.52) and iron (83.28).The liquid waste, following precipitation of the barren solution with zinc sulfate, was also studied and after 5h, the percentage removals of cupric ion (90.63), total cyanide (71.49) and thiocyanate (90.63). Analysis showed that in the process of electric adsorption, the ions in solution interacted by directional migration, enrichment precipitation and adsorption processes. Conclusions Electrical adsorption provides a suitable process for the treatment of the waste-waters from the cyanide leaching of gold.
- 备注：
- 宋永辉
- 第一作者：
- 宋永辉
- 论文类型：
- 期刊论文
- 卷号：
- 卷：91
- 期号：
- 期：9
- 页面范围：
- 页：2539-2544
- 是否译文：
- 否
- 发表时间：
- 2016-08-01
- 下一条：含氰废水的电化学处理技术研究进展