化工进展

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PbSO4、PbO在柠檬酸钠溶液中溶解行为

何东升1,2,李巧双2,杨典奇2,杨聪2,王贤晨2,杨家宽1   

  1. 1华中科技大学环境科学与工程学院,湖北 武汉 430074;2武汉工程大学环境与城市建设学院,湖北 武汉 430073
  • 出版日期:2014-02-05 发布日期:2014-02-25

Dissolution behavior of PbSO4 and PbO in sodium citrate solution

HE Dongsheng1,2,LI Qiaoshuang2,YANG Dianqi2,YANG Cong2,WANG Xianchen2,YANG Jiakuan1   

  1. 1School of Environmental Science and Engineering,Huazhong University of Science & Technology,Wuhan 430074,Hubei,China;2School of Environment and Civil Engineering,Wuhan Institute of Technology,Wuhan 430073,Hubei,China
  • Online:2014-02-05 Published:2014-02-25

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

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