Treatment of Na 2 SO 4 -Containing Wastewater Generated During the Recycling of Spent Lithium-Ion Batteries: Comparative Study on the Operating Modes of Bipolar Membrane Electro-Dialysis. - Seo, Minhyuk; Lee, Youngjae; Kim, Junhee; Chang, Jaehyuk; Cho, Yeonchul; Ahn, Jaewoo (Metals (2075-4701), 2025)