Hierarchically Porous Structured Adsorbents with Ultrahigh Metal-Organic Framework Loading for CO2 Capture.

Metal-organic frameworks (MOFs) have emerged as promising candidates for CO2 adsorption due to their ultrahigh-specific surface area and highly tunable pore-surface properties. However, their large-scale application is hindered by processing issues associated with their microcrystalline powder nature, such as dustiness, pressure drop, and poor mass transfer within packed beds. To address these challenges, shaping/structuring micron-sized polycrystalline MOF powders into millimeter-sized structured forms while preserving porosity and functionality represents an effective yet challenging approach. In this study, a facile and versatile strategy was employed to integrate moisture-stable and scalable microcrystalline MOFs (UiO-66 and ZIF-8) into a poly(acrylonitrile) matrix to fabricate readily processable, millimeter-sized hierarchically porous structured adsorbents with ultrahigh MOF loadings (∼90 wt %) for direct industrial carbon capture applications. These structured composite beads retained the physicochemical properties and separation performance of the pristine MOF crystal particles. Structured UiO-66 and ZIF-8 exhibited high specific surface areas of 1130 m2 g-1 and 1431 m2 g-1, respectively. The structured UiO-66 achieved a CO2 adsorption capacity of 2.0 mmol g-1 at 1 bar and a dynamic CO2/N2 selectivity of 17 for a CO2/N2 gas mixture with a 15/85 volume ratio at 25 °C. Furthermore, the structured adsorbents exhibited excellent cyclability in static and dynamic CO2 adsorption studies, making them promising candidates for practical application.

COVID-19 and Mental Health Among People Who Are Forcibly Displaced: The Role of Socioeconomic Insecurity.

OBJECTIVE: Forcibly displaced persons may be at elevated risk for poor mental health outcomes because of the COVID-19 pandemic. This study sought to examine associations between COVID-19-related socioeconomic insecurity and mental health outcomes among asylum seekers. METHODS: The authors evaluated the association between the degree of food, housing, and income insecurity related to the pandemic and mental health outcomes among East African asylum seekers in a high-risk, postdisplacement setting in the Middle East (i.e., Israel). RESULTS: Anxiety symptom severity (p=0.03) as well as the rate of suicidal ideation among women (odds ratio [OR]=2.81, p=0.016) were significantly elevated in a community sample of asylum seekers during the COVID-19 pandemic (N=66) relative to a similar sample (N=158) from the same community and context assessed before the pandemic. No differences between the two groups were observed for severity or rate of probable depression or posttraumatic stress disorders. In addition, among the sample assessed during the pandemic, socioeconomic insecurity due to the pandemic was strongly associated with elevated symptom severity and probable anxiety, depression, and posttraumatic stress disorders as well as suicidal ideation (R2 range=0.19-0.35; OR range=4.54-5.46). CONCLUSIONS: Findings are consistent with growing evidence of a mental health crisis among asylum seekers that is linked to COVID-19 control policies and residential status policies. The results highlight the risk for suicidal ideation linked to intersectional marginalization among female asylum seekers. These findings may inform postdisplacement policy making, social justice advocacy, humanitarian aid, and clinical science and practice to mitigate poor mental health outcomes associated with COVID-19 among forcibly displaced persons.

Predictors of mortality among HIV infected children on anti-retroviral therapy in Mekelle Hospital, Northern Ethiopia: a retrospective cohort study.

BACKGROUND: The introduction of antiretroviral therapy in 1996 improved the longevity and wellbeing of peoples living with HIV in the industrialized world including children. This survival benefit of antiretroviral therapy (ART) in reducing HIV related deaths has been well studied in the developed world. In resource-poor settings, where such treatment was started recently, there is inadequate information about impact of ART on the survival of patients especially in children. So, this study aims to investigate predictors of mortality of children on ART. Therefore, the objective of this study was to identify predictors of mortality among children on HAART. METHODS: A retrospective cohort study was conducted on 432 children who initiated antiretroviral therapy from June 2006 to June 2011 at pediatrics ART clinic in Mekelle Hospital, Northern-Ethiopia. Data were extracted from electronic and paper based medical records database and analyzed using Kaplan Meier survival and Cox proportional hazard model to identify independent predictors of children's mortality on ART. RESULTS: The total time contributed by the study participants were 14,235 child-months with median follow up of 36 months. The mortality rate of this cohort was 1.40 deaths per 1000 child-months or 16.85 deaths per 1000 child-years. Age less than 18 months [ Adj.HR (95% CI) = (4.39(1.15-17.41)], CD4 percentage <10 [Adj.HR (95% CI) = 2.98(1.12-7.94)], WHO clinical stage (III&IV) [Adj.HR (95% CI) = 4.457(1.01-19.66)], chronic diarrhea[Adj.HR (95% CI) = 4.637(1.50-14.31)] and hemoglobin < 8 g/dl[Adj.HR (95% CI) = 3.77(1.29-10.98)] all at baseline were significantly and independently associated with survival of children on ART. CONCLUSIONS: Mortality of children on ART was low and factors that affect mortality of children on ART were age less than 18 months, lower CD4 percentage, advanced WHO clinical stage (III&IV), presence of chronic diarrhea and lower hemoglobin level all at baseline. The high early mortality rate would support the value of an earlier treatment start before development of signs of immunodeficiency syndrome despite the method of HIV diagnosis and WHO stage.