A new circular treatment concept integrating selective ED, RO, and neutralization for treating PAindustry wastewater is introduced. The process reduces wastewater volume by >90% and neutralizes acidity while recovering clean water, H2SO4, and P, as enabled by the remarkable ion-separation performance in the low-pH ED step. Although pH-dependent PO4-SO4 separation can be directly related to acid-base chemistry, the high monovalent-divalent cation selectivity at low pH warrants further study.