Abstract: Effects of dissolution time，dissolution temperature，the concentration of sodium citrate and the addition amount of citric acid on dissolution behaviors of PbSO4 and PbO in sodium citrate solution were investigated. The results showed that PbO dissolution rate reached 51.16% after dissolving for 0.5 h，and with the increase of dissolution time，PbSO4 dissolution rate first increased and then decreased. PbSO4 dissolution rate increased and PbO dissolution rate decreased 37.98% with the increase of dissolution temperature，however，both of them increased when increasing the concentration of citric sodium. With the increase of citric acid addition，PbSO4 dissolution rate decreased to 6.39%，by contrast，PbO dissolution rate obviously increased，reached 97.32%. The results have provided basic data and theoretical support for new technology of recovering lead from used lead-acid battery with citric acid - sodium citrate solution.

Key words: lead sulfate, lead oxide, sodium citrate, dissolution

摘要： 考察了溶解时间、溶解温度、柠檬酸钠浓度以及柠檬酸加入量对PbSO4、PbO在柠檬酸钠溶液中溶解行为影响。结果表明，PbO溶解0.5 h即可达到溶解平衡，而PbSO4溶解率则会在达到最大值51.16%后随溶解时间延长而降低。随溶解温度升高，PbSO4溶解率增大，PbO溶解率降低，最大降低37.98%；PbSO4、PbO溶解率均会随着柠檬酸钠浓度的提高而增大，且前者增大趋势更明显；增大柠檬酸加入量，PbSO4溶解率减小至6.39%，PbO溶解率则可增大至97.32%。研究结果可为柠檬酸法处理废铅酸蓄电池铅膏工艺提供基础性数据和理论支持。

关键词: 硫酸铅, 氧化铅, 柠檬酸钠, 溶解