Advanced membrane-based high-value metal recovery from wastewater.

Considering the circular economy and environmental protection, sustainable recovery of high-value metals from wastewater has become a prominent concern. Unlike conventional methods featuring extensive chemicals or energy consumption, membrane separation technology plays a crucial role in facilitating the sustainable and efficient recovery of valuable metals from wastewater due to its attractive features. In this review, we first briefly summarize the sustainable supply chain and significance of sustainable recovery of aqueous high-value metals. Then, we review the most recent advances and application potential in promising state-of-the-art membrane-based technologies for recovery of high-value metals (silver, gold, rhenium, platinum, ruthenium, palladium, iridium, osmium, and rhodium) from wastewater effluents. In particular, pressure-based membranes, liquid membranes, membrane distillation, forward osmosis, electrodialysis and membrane-based hybrid technologies and their mechanism of high-value metal recovery is thoroughly discussed. Then, engineering application and economic sustainability are also discussed for membrane-based high-value metal recovery. The review finally concludes with a critical and insightful overview of the techno-economic viability and future research direction of membrane technologies for efficient high-value metal recovery from wastewater.

Self-Care Behavior and Associated Factors among Heart Failure Patients in Tigray, Ethiopia: A Cross-Sectional Study.

The purpose of this study was to assess the prevalence of self-care behavior and associated factors among heart failure patients. This institutional-based cross-sectional study design was done in Tigray region, Ethiopia. The data collection process was made between February and April 2018. An interviewer assisted structured questionnaire and medical chart review was used to collect the data. Data was entered and analyzed using Statistical Package for the Social Science (SPSS) version 22. Bivariate and multivariable logistic regression were conducted to identify the predictors (p < .05). In this study, a total of 408 study subjects was included. The mean age of the participants was 45.4 (±19). The overall prevalence of good self-care behavior was 45.8% (95% CI: 40.9-50.5). Regression analysis revealed that age, educational level, co-morbidity, knowledge about heart failure, and social support were significantly associated with self-care behavior. Healthcare providers should strengthen patient education to improve self-care behavior.

Prevalence and Associated Factors of Early Postnatal Care Service Use Among Mothers Who Had Given Birth Within the Last 12 Months in Adigrat Town, Tigray, Northern Ethiopia, 2018.

BACKGROUND: The care given for the first hours, days, and weeks after childbirth is life-threatening. So far, this period receives less attention from health-care providers than the care given to pregnancy and delivery. This study aimed to determine the prevalence and associated factors of early postnatal care service use among mothers who had given birth in the last 12 months in Adigrat Town, Tigray, Ethiopia. METHODS: A community-based cross-sectional study was conducted from March to April 2018 among 481mothers who had given birth in the last 12 months. A systematic random sampling technique was used to select study participants. A pre-tested and structured questionnaire was used to collect the data. Data analysis was computed using SPSS version 20. An adjusted odds ratio with a 95% confidence interval and p-value less than 0.05 was used to determine the level of significance. RESULTS: The proportion of early postnatal care service utilization was 34.3% (95% CI: 29.9%-38.5%). Mothers' use of early postnatal care service was predicted by previous early postnatal care use (AOR=2.60, 95% CI: 1.41-4.77), ANC visit (AOR=0.122, 95% CI:0.059-0.251), delivery complication (AOR=5.57, 95% CI: 2.85-10.89), distance (AOR =5.05, 95% CI: 2.45-10.42), postnatal home visit (AOR=0.21, 95% CI: 0.11-0.40), awareness on early postnatal care (AOR=16.38 95% CI: 6.23-43.07), age (AOR=9.34, 95% CI: 1.73-50.27), (AOR=6.50, 95% CI: 2.29-18.41), (AOR= 6.23, 95% CI: 2.38-16.33) and income (AOR=7.97 95% CI: 2.42-26.26, AOR=3.30 95% CI:1.42-7.67). CONCLUSION: Our study's finding revealed that the prevalence of early postnatal care service use was low. Early postnatal care service use was significantly associated with previous early postnatal care use, delivery complication, distance, postnatal home visit, number of ANC visits, awareness on early postnatal care use, age, and income.