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以一种新型煤基电吸附材料为极板,采用电吸附技术处理高浓度氰化提金废水。主要研究了吸附电压、电吸附时间对废水中游离氰及金属氰络离子吸附率的影响,采用扫描电镜(SEM)、能谱分析(EDS)及X射线衍射(XRD)等对吸附后的电极片及过程产生的沉淀物进行了分析表征。研究表明,当吸附电压为2.0 V、极板间距1 cm、吸附时间为24 h时,溶液中铜、总氰、锌、铁和硫氰酸根的去除率分别达到61.55%,71.14%,99.52%,83.28%及58.59%。电吸附过程中,在阳极和阴极附近会产生絮状沉淀物,其主要组成为亚铁氰化铜、硫氰化亚铜和氢氧化锌,同时吸附后的阳极板上出现了铜、铁与锌离子的富集。高浓度氰化提金废水的电吸附过程同时包含了离子的定向迁移、富集沉淀以及阳极吸附3个过程,三者共同作用下体系中各离子含量将会大幅度降低,处理后溶液可直接返回浸出系统循环使用。
A new type of coal-based electrosorption material is used as the electrode plate, and the electrosorption technique is used to treat high-concentration cyanide-leaching wastewater. The effects of adsorption voltage and electrosorption time on the adsorption of free cyanide and metal cyanide ions in waste water were studied. The adsorption capacity of adsorbed electrode was investigated by SEM, EDS and XRD. The pellets and the sediment produced by the process were analyzed and characterized. The results show that the removal rates of copper, total cyanide, zinc, iron and thiocyanate in solution reach 61.55%, 71.14% and 99.52% respectively when the adsorption voltage is 2.0 V, the distance between plates is 1 cm and the adsorption time is 24 h. , 83.28% and 58.59% respectively. Electroadsorption process, in the vicinity of the anode and cathode will produce flocculent precipitate, which is mainly composed of copper ferrocyanide, cuprous thiocyanate and zinc hydroxide, while the anode plate after adsorption appeared copper, iron and Zinc ion enrichment. The high concentration cyanidation gold electrowinning process contains both the directional migration of ions, enrichment and precipitation and anodic adsorption of three processes, the three together under the action of various ions in the system will be significantly reduced, the solution can be treated directly Return to leaching system for recycling.