Journal
JOURNAL OF CLEANER PRODUCTION
Volume 267, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2020.122107
Keywords
Recovery of alpha-PbO; High purity; Green approach; Electrode material; Lead acid batteries
Categories
Funding
- National Key Research and Development Program of China [2019YFC1908304]
- National Natural Science Foundation of China [21676022, 21706004]
- Fundamental Research Funds for the Central Universities [BHYC1701A]
Ask authors/readers for more resources
Herein, we propose a green, cost-effective and short-loop route for recovering high-purity alpha-lead oxide (alpha-PbO) from spent lead-acid batteries. This newly proposed route consists of leaching, carbonation and thermal decomposition processes. In the leaching process, the lead sulfate (PbSO4) from spend lead paste was reacted with conjugated solution of ammonium sulfate-ammonia ((NH4)(2)SO4NH3) to form a soluble complex. The dissolved PbSO4 in the conjugated solution was converted into lead carbonate (PbCO3) precipitate via absorption of carbon dioxide (CO2). Afterwards, the high-purity alpha-PbO was obtained by thermal decomposition of PbCO3. Results show that the leaching rate of PbSO4 from lead paste reaches up to 99.8 +/- 0.15%, the recovery rate of lead is 99.85% and the purity of the obtained alpha-PbO is as high as 99.992%, indicating the recovered alpha-PbO has high purity. As well, the recovered alpha-PbO shows a better electrochemical activity than the conventional Shimadzu ball-milling method. Beside of recovering high-purity alpha-PbO, the used raw materials of conjugated solution and the intermediate product of CO2 could be collected and utilized in the next batch. Therefore, the present work develops a new green and economic route to solve the recovery problems of high purity alpha-PbO from spent lead-acid batteries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available