Selective Leaching of Spent LiFe0.4Mn0.6PO4 in a System ofDL-Malic Acid and Sodium Persulfate 
LIU Yongqi, GONG Qinxue, ZHOU Qi, ZHENG Yu, YANG Yunguang, TANG Honghui
Mining and Metallurgical Engineering . 2025, (3): 163 -167 .  DOI: 10.3969/j.issn.0253-6099.2025.03.027