Selective recovery of toxic beryllium from lithium smelting wastewater via P227 extraction: Sustainable detoxification and resource utilization - Kaixuan Sun; He Li; Yadong Ning; Xiaobo Shen; Guangye Wei; Caixia Lv; Jingkui Qu; Zhihui Yu; Yu Gao (Journal of Water Process Engineering, 2025)