Efficient Desulfurizer Recycling during Spent Lead-Acid Batteries Paste Disposal by Zero-Carbon Precursor Hypothermic Smelting.

ABSTRACT: Recycling of spent lead-acid batteries (LABs) is extremely urgent in view of environmental protection and resources reuse. The current challenge is to reduce high consumption of chemical reagents. Herein, a closed-loop spent LABs paste (SLBP) recovery strategy is demonstrated through Na₂MoO₄ consumption-regeneration-reuse. Experimental and DFT calculations verify that MoO₄ ^2- competes Pb/Ca ions and weakens the metal-oxygen bond of PbSO₄/CaSO₄.2H₂O in SLBP, facilitating PbMoO₄/CaMoO₄ formation and 99.13 wt% of SO₄ ^2- elimination. Pb of 99.97 wt% is obtained as zero-carbon precursors (PbO₂ and PbMoO₄) by green leaching coupled with re-crystallization

SUBMITTER: Li F 

PROVIDER: S-EPMC11578296 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature