ABSTRACT
The recent advancement of water stable metal-organic frameworks (MOFs) expands the application of this unique porous material. This review article aims at studying their applications in terms of five major areas: adsorption, membrane separation, sensing, catalysis, and proton conduction. These applications are either conducted in a water-containing environment or directly targeted on water treatment processes. The representative and significant studies in each area were comprehensively reviewed and discussed for perspectives, to serve as a reference for researchers working in related areas. At the end, a summary and future outlook on the applications of water stable MOFs are suggested as concluding remarks.
ABSTRACT
In this study, continuous zirconium(IV)-based metal-organic framework (Zr-MOF) membranes were prepared. The pure-phase Zr-MOF (i.e., UiO-66) polycrystalline membranes were fabricated on alumina hollow fibers using an in situ solvothermal synthesis method. Single-gas permeation and ion rejection tests were carried out to confirm membrane integrity and functionality. The membrane exhibited excellent multivalent ion rejection (e.g., 86.3% for Ca(2+), 98.0% for Mg(2+), and 99.3% for Al(3+)) on the basis of size exclusion with moderate permeance (0.14 L m(-2) h(-1) bar(-1)) and good permeability (0.28 L m(-2) h(-1) bar(-1) µm). Benefiting from the exceptional chemical stability of the UiO-66 material, no degradation of membrane performance was observed for various tests up to 170 h toward a wide range of saline solutions. The high separation performance combined with its outstanding water stability suggests the developed UiO-66 membrane as a promising candidate for water desalination.
ABSTRACT
Chronic obstructive pulmonary disease (COPD) affects the lives of individuals in a number of ways; it causes an increase in the need for help and support and a decline in self-care agency and quality of life. This research has been conducted in patients with COPD hospitalized in the Pulmonary Department of Erzincan State Hospital in the eastern Turkey to examine the effect of anxiety and depression on self-care agency and quality of life (n = 135). The results showed that 69.6% and 85.6% of the patients were at risk for anxiety and depression, respectively, and that the mean scores of self-care agency and quality of life decreased as the mean scores of anxiety and depression increased. It was also established that the mean score of the quality of life increased as the mean score of self-care agency went up. It could be concluded that the majority of the patients are at risk for anxiety and depression and that presence of anxiety or depression has a negative effect on the self-care agency and the quality of life. The recognition and treatment of depression and anxiety in patients with COPD provide significant improvements in self-care agency and quality of life of patients.
