电动力去除锰渣滤液中锰的研究

Manganese ion removal from filtrate of manganese slag using electrokinetic technology

通过电动力技术对锰渣滤液中锰的迁移、转化和去除规律进行研究。结果表明:降低初始锰浓度,增加电流密度均有助于锰离子的去除。当锰初始浓度为470 mg/L,电流密度为5 m A/cm^2,阴极空气流量为0.05 L/min,反应时间为7.5 h时,电解槽C、D区域锰离子浓度分别下降至40.3 mg/L、21.6 mg/L,A、B区域均未检出锰离子。反应机理为Mn^(2+)在电动力作用下由阳极向阴极迁移,阴极同时电解水产生OH^-,OH^-与Mn^(2+)作用形成Mn(OH)_2,Mn(OH)_2进一步与空气反应形成Mn_3O_4。

In this study,we analyzed the migration,transformation and removal rules of manganese ion from filtrate of manganese slag using electrokinetic technology. The results showed that,reducing the initial concentration of manganese ion and increasing the current density were helpful to the removal of manganese ion from the filtrate. When the initial concentration of manganese ion was 470 mg/L,the current density was 5 m A/cm^2,the cathode air flow was 0. 05 L/min and the reaction time was 7. 5 h,the concentration of manganese ion in C and D regions of the electrolyzer decreased to 40. 3 mg/L and 21. 6 mg/L,respectively,and manganese ion was not detected in A and B regions. The reaction mechanisms were that Mn^2＋ ion migrated from the anode to the cathode under electrokinetic force,then Mn^2＋ ion reacted with OH-produced at the cathode to form Mn（OH）2,Mn（OH）2 further reacted with O2 in air to form Mn3O4.