摘要
采用NaS_2O_3-CuSO_4-NH_4OH-Na_3(C_6H_5O_7)体系,从废弃手机电子元器件中浸取银,考察了硫代硫酸钠浓度、氨水浓度、硫酸铜浓度、柠檬酸钠浓度、温度以及浸出时间等对浸银过程的影响,结果表明:当硫代硫酸钠为0.2 mol/L,氨水为0.2 mol/L,硫酸铜为0.01 mol/L,柠檬酸钠为0.05 mol/L,温度为40℃,搅拌速率为400 r/min,固液比1∶200(g/m L),浸出时间为24 h时,银的浸出率约为94.1%,柠檬酸钠的添加可明显提高银的浸出速率,从而降低硫代硫酸钠的消耗量。
Silver in the components of waste mobile phones was leached by NaS2O3-CuSO4-NH4OH-Na3（C6H5O7）. It is investigated that,influence of external factors such as concentrations of sodium thiosulfate,ammonium hydroxide,copper sulfate,sodium citrate and temperature,leaching time on the silver leaching process. The results of the experiments indicated that up to 94. 1% of tatal silver can be extracted under the condition of 0. 2 mol/L NaS2O3,0. 2 mol/L NH4 OH,0. 01 mol/L CuSO4,0. 05 mol/L sodium citrate at 40 ℃ and the stirring rate of 400 r/min for 24 h,with a solid/liquid ratio of 1/200（g/m L）. Sodium citrate could apparently improve the effect of leaching silver and reduce the consumption of sodium thiosulfate.
出处
《环境工程》
CAS
CSCD
北大核心
2017年第2期111-116,共6页
Environmental Engineering
基金
国家自然科学基金(21377041)
广东省科技计划项目(2013B021300022)
关键词
电子元器件
硫代硫酸盐法
柠檬酸钠
银
浸出
electronic components
thiosulfate system
sodium citrate
silver
leaching
