铅膏在柠檬酸-柠檬酸钠体系中的浸出过程  

Leaching Process of Spent Lead Paste in Citric Acid-Sodium Citrate System

作　　者：朱新锋[1,2] 杨家宽[2] 孙晓娟[2] 张伟[2] 胡雨辰[2] 李磊[2] 郭一飞[1] 陈松涛[1] 

机构地区：[1]河南城建学院市政与环境工程系,河南平顶山467023 [2]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《过程工程学报》2013年第4期615-620,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50804017);教育部新世纪人才支持计划资助项目(编号:NCET-09-0392);湖北省自然科学杰出青年基金重点资助项目(编号:13105043);武汉市科技攻关资助项目(编号:2013060501010168);河南省教育厅科学技术研究重点资助项目(编号:13B610911)

摘　　要：研究了铅酸蓄电池废铅膏在柠檬酸-柠檬酸钠体系中浸出过程中形貌及成分的变化.结果表明,浸出过程中PbO_2与PbO在1 h内完全反应,而PbSO_4反应相对较慢,反应1 h脱硫率为36.2%,8 h脱硫完全.浸出过程中PbSO_4颗粒不断变小,PbSO_4生成柠檬酸铅的过程为缩核反应,起初阶段柠檬酸铅为絮状颗粒,随反应进行,颗粒逐渐长大,最终为板状结构.The leaching process of spent lead paste in citric acid and sodium citrate system was studied. During the leaching process, the variation of morphology and composition of reactants was investigated by SEM/EDX. The results show that PbO2 and PbO can be completely transformed into lead citrate within 1 h, while PbSO4 reacts relatively slowly with a desulfizrization rate of 36.2% in 1 h and can be completely transformed in 8 h leaching. During the reaction process, the particle size of PbSO4 reduces continuously, which indicates that the leaching process of PbSO4 may comply with a core-shrinking model. And lead citrate, the leaching product with an initial morphology of flocculent, gradually grows up in the final plate structure.

关 键 词：铅膏 浸出 柠檬酸-柠檬酸钠体系 柠檬酸铅 

分 类 号：X7[环境科学与工程—环境工程]