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Spent lithium-ion batteries (LIBs) are an essential secondary resource containing valuable metal elements. The recovery of valuable metals from spent LIBs poses immense importance in terms of environmental protection and mitigating resource shortages. Sulfation roasting has been demonstrated to have high efficiency in recovering valuable elements from spent LIBs. Nevertheless, conventional sulfation roasting techniques have certain drawbacks, such as lack of sustainability and an adverse environmental impact, due to the utilization of costly sulfation reagents and the emission of SO2. Herein, a green strategy involving waste copperas-assisted sulfation and roasting–water leaching process with SO2-free emissions is proposed to selectively recover lithium and prepare low-cost LIB-derived CoFe2O4 catalysts from spent lithium cobalt oxide (LCO) batteries. Under optimal conditions, approximately 92.87% of lithium in the LCO battery cathode could be successfully recovered as Li2CO3 with a purity of 99.69%. Additionally, the prepared LIB-derived CoFe2O4 catalyst showed an excellent CO catalytic activity at 300 °C, with about 98% of CO being effectively oxidized. The catalysis process followed a Mars–van Krevelen-type mechanism, where CO was oxidized by the interaction with the adsorbed oxygen species and lattice oxygen. This strategy is the first to combine the selective recovery of lithium with CO purification, achieving the efficient and functional utilization of spent LIBs and providing a new strategy for treating spent LIBs. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the value of echocardiographic parameters in predicting early spontaneous closure of ductus arteriosus in premature infants., Methods: 222 premature infants admitted to the neonatal ward of our hospital were selected, and patent ductus arteriosus was detected by echocardiography 48 h after birth. On the 7th day, whether the ductus arteriosus was closed naturally in this cohort was observed. The infants whose ductus arteriosus were not closed were identified as the PDA group ( n  = 109), and the other infants were included in the control group ( n  = 113). The echocardiographic parameters of the two groups of premature infants at 48 h after birth were single-factor statistically and Pearson correlation analyzed, and the parameters with statistically significant differences in single-factor analyzed were selected for multivariate logistic stepwise regression analysis., Results: The ductus arteriosus shunt velocity and the pressure difference between the descending aorta and the pulmonary artery (ΔPs) in the PDA group were lower than those in the control group ( P  < 0.05). The pulmonary artery pressure (PASP) in the PDA group was higher than that in the control group ( P  < 0.05). According to the multivariate logistic stepwise regression analysis, only the maximum shunt velocity of ductus arteriosus was correlated with early spontaneous closure of ductus arteriosus in 48 h first echocardiographic parameters ( P  = 0.049). The receiver operating characteristic (ROC) curve indicates the optimal critical point of echocardiographic ductus arteriosus shunt velocity in premature infants 48 h after birth was 1.165 m/s., Conclusion: Echocardiographic parameters are of great value in predicting the early spontaneous closure of ductus arteriosus in premature infants. In particular, the ductus arteriosus shunt velocity is correlated with the early spontaneous closure of ductus arteriosus., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (© 2023 He, Yang, Gan, Tang, Ran and Zhang.)