含硫体系中SO_3^(2-)对S_2O_3^(2-)浓度的影响

Influence of SO_3^(2-) on S_2O_3^(2-) Concentration in Bearing Sulfur System

分析不同条件下模拟含硫体系反应过程中S2O32-与SO32-的浓度变化。结果表明,在未通空气时,SO32-的加入阻碍了S2O32-与Cu(NH3)42-发生氧化还原反应,通空气中时,SO32-加入有利于体系中S2O32-的浓度保持稳定。不加入SO32-时,S2O32-的氧化速度加剧,且有单质S0生成,降低主成分S2O32-的浸金效应。因此在碱性含硫浸金体系中,SO32-具有保持主成分S2O32-浓度稳定的作用。

The concentration variation of S2O32-and SO32-are analyzed during the reaction of simulation sulfur system under different conditions.The results show that the oxidation reaction between S2O32-and Cu(NH3)42-without air is hindered by addition of SO32-.The addition of SO32-is beneficial to remain S2O32-concentration stabilization in system under air.While there is no addition of SO32-,the oxidation rate of S2O32-is increased,its concentration is decreased and S0 is generated,so the gold leaching result is no...