Ag. Morachevskii et al., APPLICATION OF SODA SOLUTIONS IN PROCESSING RECOVERABLE LEAD MATERIALS, Russian journal of applied chemistry, 66(9), 1993, pp. 1608-1609
It has been shown that sodium carbonate solutions are efficient in des
ulfation of the active substance of lead batteries. With a 20% excess
of soda and with at least 50% lead oxide or dioxide in the mixture, th
e SO42- ions are completely removed from the solid phase, and lead doe
s not pass into the soda solution.