论文部分内容阅读
本文报道富集银后的碳毡电极用四种方法进行洗脱处理的结果。实验表明,当银离子浓度在1×10~(-1)—1×10~(-7)g/mL,范围内,被碳毡电极系统电化学富集后,用1mol/L硝酸作为洗脱剂,用活化加热法能使富集在碳毡电极表面的银获得最好的洗脱效率,平均洗脱率为95±2%。对于1×10~(-7)g/mL的原始待富集液与浓集液体积之比为270:1左右,每克碳毡可富集银1. 67×10~(-3)g。
In this paper, we report the results of four methods of elution of silver-enriched carbon felt electrode. The experimental results show that when the concentration of silver ions is 1 × 10 -1 -1 × 10 -7 g / mL, it is electrochemically enriched by carbon felt electrode system and washed with 1 mol / L nitric acid The best elution efficiency of the silver enriched on the surface of the carbon felt electrode was obtained by the activation heating method with the average removal rate of 95 ± 2%. For 1 × 10 ~ (-7) g / mL, the ratio of the volume of the original solution to be concentrated to the concentrate is about 270: 1, and the carbon felt can enrich 1.67 × 10 ~ (-3) g .