“Tortoise and Hare” strategy: Polyethyleneimine/sodium alginate-functionalized iron tailings regulate Pb Cu diffusion priorities for remediating contaminated soil - Yutong Liu; Ruijie Ge; Gaoyuan Gu; Yuanfei Wang; Yu Zhang; Chong Peng; Shuyi Yang; Tao E. (Chemical Engineering Journal, 2026)