In this paper, a weak-base resin was adopted to recycle rhenium because of its excellent adsorption and desorption properties for rhenium, while the kinetics and thermodynamics properties of adsorbing rhenium from the...In this paper, a weak-base resin was adopted to recycle rhenium because of its excellent adsorption and desorption properties for rhenium, while the kinetics and thermodynamics properties of adsorbing rhenium from the rhenium stock solution were systematically investigated. The kinetics investigations confirm that the adsorption process of Re belongs to kinetic control by particle diffusion process and the corresponding reaction rate constant is 2.68 × 10-s s^-1. Then, the Langmuir and Freundlich models were used to describe the adsorption equilibrium behaviors of Re and the thermodynamics parameters are obtained. The results show that the Langmuir model is the best-fitted model, and the Gibbs free energy change of Re adsorption onto ZS 15 weak-base resin is AGO = - 10.59 ＋ 12.66T. To verify the weak-base resins for extracting rhenium in industrial application, the column experiments were operated in the spray solution generating by roasting the molybdenum concentrates. The results indicate that the weak-base resins possess excellent adsorptive selectivity for rhenium, and the ammonia solution with low concentration could sufficiently desorb rhe- nium from the resins.展开更多
目的:通过Meta分析评估肌肉超声对重症监护室获得性衰弱(ICU-AW)的早期预测价值,为临床诊断提供依据。方法:检索PubMed、EMbase、the Cochrane Library、Web of Science、中国知网、中国生物医学文献数据库、维普数据库、万方数据库,检...目的:通过Meta分析评估肌肉超声对重症监护室获得性衰弱(ICU-AW)的早期预测价值,为临床诊断提供依据。方法:检索PubMed、EMbase、the Cochrane Library、Web of Science、中国知网、中国生物医学文献数据库、维普数据库、万方数据库,检索时限为建库至2024年3月1日。根据纳入和排除标准来筛选文献,将肌肉超声对ICU-AW的相关诊断试验类文献纳入研究。采用诊断准确性质量评价工具(QUADAS-2)对纳入文献进行质量评价。结果:最终纳入11项研究,涉及重症病人587例。Meta分析结果显示,肌肉超声诊断ICU-AW的合并敏感度、合并特异度、合并阳性似然比、合并阴性似然比、合并诊断比值比分别为0.71[95%CI(0.60,0.80)]、0.78[95%CI(0.74,0.81)]、3.15[95%CI(2.72,3.66)]、0.38[95%CI(0.27,0.52)]、8.33[95%CI(5.41,12.83)]。综合受试者工作特征曲线下面积为0.80[95%CI(0.76,0.83)]。结论:现有证据表明,肌肉超声对早期ICU-AW具有良好的预测价值,可为临床检测ICU-AW提供参考。展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.51404220 and 51504225)
文摘In this paper, a weak-base resin was adopted to recycle rhenium because of its excellent adsorption and desorption properties for rhenium, while the kinetics and thermodynamics properties of adsorbing rhenium from the rhenium stock solution were systematically investigated. The kinetics investigations confirm that the adsorption process of Re belongs to kinetic control by particle diffusion process and the corresponding reaction rate constant is 2.68 × 10-s s^-1. Then, the Langmuir and Freundlich models were used to describe the adsorption equilibrium behaviors of Re and the thermodynamics parameters are obtained. The results show that the Langmuir model is the best-fitted model, and the Gibbs free energy change of Re adsorption onto ZS 15 weak-base resin is AGO = - 10.59 ＋ 12.66T. To verify the weak-base resins for extracting rhenium in industrial application, the column experiments were operated in the spray solution generating by roasting the molybdenum concentrates. The results indicate that the weak-base resins possess excellent adsorptive selectivity for rhenium, and the ammonia solution with low concentration could sufficiently desorb rhe- nium from the resins.
文摘目的:通过Meta分析评估肌肉超声对重症监护室获得性衰弱(ICU-AW)的早期预测价值,为临床诊断提供依据。方法:检索PubMed、EMbase、the Cochrane Library、Web of Science、中国知网、中国生物医学文献数据库、维普数据库、万方数据库,检索时限为建库至2024年3月1日。根据纳入和排除标准来筛选文献,将肌肉超声对ICU-AW的相关诊断试验类文献纳入研究。采用诊断准确性质量评价工具(QUADAS-2)对纳入文献进行质量评价。结果:最终纳入11项研究,涉及重症病人587例。Meta分析结果显示,肌肉超声诊断ICU-AW的合并敏感度、合并特异度、合并阳性似然比、合并阴性似然比、合并诊断比值比分别为0.71[95%CI(0.60,0.80)]、0.78[95%CI(0.74,0.81)]、3.15[95%CI(2.72,3.66)]、0.38[95%CI(0.27,0.52)]、8.33[95%CI(5.41,12.83)]。综合受试者工作特征曲线下面积为0.80[95%CI(0.76,0.83)]。结论:现有证据表明,肌肉超声对早期ICU-AW具有良好的预测价值,可为临床检测ICU-AW提供参考。
