摘要
本文重点讨论Au(CN)_2^-和Ag(CN)_2^-在活性炭上吸附的行为和特征。 当矿浆中只有Au(CN)_2^-或Ag(CN)_2^-时,它们在活性炭上的吸附过程和特征相同;当矿浆中既有Au(CN)_2^-又有Ag(CN)_2^-时,它们的吸附过程和行为又不相同。 Ag(CN)_2^-对Au(CN)_2^-在活性炭上吸附的连续性没有影响,但对吸附容量有影响。无Ag(CN)_2^-时金在活性炭上的吸附容量为q=40.71C^(0.717),有Ag(CN)_2^-时(本文叙及条件),金在活性炭上的吸附容量为q=4.4368C^(0.4701)。 q——吸附平衡时金容量,mg/g.c; C——吸附平衡时液相金品位,mg/L。 受Au(CN)_2^-的影响,Ag(CN)_2`-在活性炭上的吸附行为变化很大,可由吸附变为解吸。因此,当Au(CN)_2^-和Ag(CN)_2^-存在于同一体系时,它们在活性炭上的吸附不能同时完成,金、银必须进行分段吸附才能获得满意的吸附效果。
Both Au(CN)2-and Ag(CN)2- follow the same course of being adsorbed onto carbon when contained in ore pulp separately.However,they exhibit different behaviors and characteristics from each other in the course of adsosption by activated carbon when they are contained in the same ore pulp at the same time.
None of Ag(CN)2- would influence the continuity of adsorbing Au(CN)2-onto activated carbon except adsorptive capacity could be influenced by it.For an.example, the adsorptive capacity of gold on carbon is q=10.71C0.717 in the absence of Ag(CN)2- while q = 4.4368C0.4701 in the presence of Ag(CN)2-
Where
Q represents adsorptive capacity of gold when in adsorptive equilibrium
C represents the grade of liquid phase of gold when in adsorplive equili- brium
Influenced by Au(CN)2-, the behavior of Ag(CN)2- when adsorbed by carbon varies greatly,even changing gold adsorption into gold elution.So comes this paper a conclusion below:
(1) Au(CN)2- and Ag(CN)2- should not be retained in the same system at the same time, or else the adsorption of thcm by activated carbon could not be carried out.
(2) Gold adsorption should be carried on separately from silver adsorption, or else the desired result of adsorption could not be acquired.
出处
《黄金》
CAS
北大核心
1992年第5期31-37,共7页
Gold
关键词
分段吸附
氰化金
氰化银
活性炭
stage adsorptions stage of gold adsorption
stage of silver adsorption
adsorption behavior and characteristics
