Abstract：
Considering the high cost and complicated recycling process of spent lithium-ion batteries (SLIBs), transforming SLIBs into environment functional materials may be a wise approach. Herein, lithium cobaltite (LCO) cathode powders recovered from SLIBs were used to activate peroxymonosulfate (PMS) for removing carbamazepine (CBZ). The recovered LCO enables a 98.2% removal efficiency of CBZ (2.5 mg/L) within 10 min, which was effective at a broader pH range (pH = 5.0-11.0). The influence of key factors (initial pH, PMS, and catalyst dosage) and coexisting substances (SO42-, H2PO4-, NO3-, Cl-, HCO3-, and HA) on CBZ degradation were examined in detail. The primary radical species during the degradation of CBZ were proved to be 1O2, SO4-, and.OH that generated from PMS activation initiated by the valence change of Co in recovered LCO. The recovered LCO displayed excellent reusability with about 80.0% removal of CBZ after six cycles. Homogeneous activation of PMS mainly contributed to CBZ degradation in the first run, but the recovered LCO catalyst dominated the heterogeneous activation of PMS for the degradation of CBZ in the second to sixth run. Finally, the CBZ degradation pathways were presented based on the identified intermediates. This research has offered a new strategy of \"treating wastes with wastes\" to maximize the recycling of electronic wastes to remove emerging pollutants.
摘要：
考虑到废旧锂离子电池（SLIBs）的高成本和复杂的回收过程，将SLIB转化为环境功能材料可能是一种明智的方法。在这里，从SLIB中回收的钴酸锂（LCO）阴极粉末用于激活过氧单硫酸盐（PMS）以去除卡马西平（CBZ）。回收的LCO能够在10分钟内实现98.2%的CBZ去除效率(2.5mg/L),在较宽的pH范围（pH=5.0-11.0）下有效。关键因素的影响(初始pH，PMS,和催化剂用量）和共存物质（SO42-，H2PO4-,NO3-,Cl-,HCO3-,和HA）对CBZ降解进行了详细检查。CBZ降解过程中的主要自由基种类被证明是1O2，SO4-，and.由回收的LCO中Co的价态变化引发的PMS活化产生的OH。回收的LCO表现出优异的可重用性,在六个循环后CBZ的去除为约80.0%。PMS的均相活化主要有助于CBZ在第一次运行中的降解，但是回收的LCO催化剂主导了PMS的非均相活化，用于在第二次至第六次运行中降解CBZ。最后,基于所鉴定的中间体提出了CBZ降解途径。这项研究提供了一种“用废物处理废物”的新策略，以最大程度地回收电子废物以去除新出现的污染物。
