Identification of two low-cost and locally available filter media (pumice and scoria) for removal of hazardous pollutants from tannery wastewater

Abstract Background Tannery wastewater contains the most hazardous pollutants. Therefore, identifying potentially efficient, low-cost and locally available filter media as an adsorbent for the treatment of tannery wastewater is critical. The aim of this study is to identify and assess the ability of identified adsorbents and compare their efficiency. The volcanic rocks of pumice and scoria were collected from the rift valley area of Oromia region, Ethiopia and their chemical characteristics were determined using X-ray fluorescence analysis. Batch mode experimental study design was carried out. The rocks were crushed and effective size was determined by using a standard sieve. The composite tannery wastewater was collected from Dire tannery, Addis Ababa, Ethiopia and treated with pumice and scoria. Two adsorption kinetics and isotherm models were conducted to predict the removal mechanism and capacity of the adsorbents on the reduction of NO3–N, PO4–P and [Cr]T from tannery wastewater. Analysis of wastewater samples was done before and after different retention time. R statistical software and Originlab pro 2017 was run for data analysis and graphing. Results The untreated tannery wastewater revealed that the mean concentration of BOD5, COD, TSS, orthophosphate, ammonium, nitrite, nitrate, sulfide, sulfate and chromium were beyond the permissible limits. Nitrate removal efficiency of scoria and pumice were 99 and 95% respectively at retention time of 72 h. Phosphate removal was better by scoria on the first 24 and 48 h. The efficiency of pumice to remove sulfate was 83–84%, whereas scoria shows 75–77%. In the first 24 and 48 h retention time, pumice and scoria achieved 76 and 71% in chromium reduction respectively. Conclusion This study revealed that both scoria and pumice have a potential capacity to treat tannery wastewater. Conversely comparing the average efficiency to reduce hazardous pollutants scoria showed better results than pumice

Perceived Stress and Its Associated Factors during COVID-19 among Healthcare Providers in Ethiopia: A Cross-Sectional Study

Background. Coronavirus causes serious health problems worldwide including increased mental health burden to the society at large scale and particularly the healthcare providers. Understanding the immediate mental health and psychological response of the healthcare providers after a public health emergency is important for implementing better prevention and response mechanisms to a disaster. Objective. This study aimed to assess the prevalence of perceived stress and risk factors of coronavirus disease 2019 among healthcare providers in Dilla, Southern Ethiopia. Methods. An institution-based cross-sectional study was conducted among 244 samples selected with the systematic random sampling technique from March to April 2020. Data collection was carried out with a validated perceived stress scale adapted from the World Health Organization. Data were coded and entered into Epi Info Version 7 and were exported and analyzed with SPSS version 20. Crude and adjusted OR were analyzed using logistic regression, and the level of significance of association was determined at P value <0.05. Result. The prevalence of perceived stress among participants was 126 (51.6%). Being at the age range of 25–31 years (AOR = 2.5, 95% CI, 1.12, 5.81), master’s and above in their qualification (AOR = 6.0, 95% CI 1.59, 22.31), nurse professionals (AOR = 8.2, 95% CI 2.69, 24.74), and pharmacist professionals (AOR = 4.8, 95% CI, 1.25, 18.64) were variables found to have a strong statistically significant association with the perceived stress of coronavirus disease. Conclusion. More than half of the study participants were found to have perceived stress for coronavirus disease. Early screening and intervention of stress among frontline healthcare providers based on the findings are suggested

Occurrence and Pathogenicity of Indigenous Entomopathogenic Fungi Isolates to Fall Armyworm (Spodoptera frugiperda J. E. Smith) in Western Amhara, Ethiopia

The fall armyworm (FAW) (Spodoptera frugiperda J. E. Smith) is widely recognized as an invasive lepidopteran pest in Africa. Adoption of synthetic pesticides remains an option for emergency control of the FAW, but their large-scale use by small-scale farmers is costly and environmentally unsafe. Management options based on entomopathogenic fungi could minimize risks for health and the environment. In our study, the occurrence of entomopathogenic fungi in different habitats along with their pathogenicity to fall armyworm was examined. A total of 56 soil samples were collected from three locations. A standard isolation method, baited with the wax moth larvae (Galleria mellonella), was used for the isolation of entomopathogenic fungi from soil. Twelve entomopathogenic fungi were isolated from the total soil samples collected. It was observed that Metarhizium spp. was more frequent and widespread than Beauveria spp. and their occurrence was high in the forest habitat. Pathogenicity of indigenous entomopathogenic fungi isolates on fall armyworm larvae was tested by applying conidial suspension containing 1 × 108 spores/ml. All of the isolates tested were pathogenic to larvae of fall armyworm, with mortalities varying from 30 to 80% at 10 days posttreatment. Our results suggest that native entomopathogenic fungi could be integrated for the management of Spodoptera frugiperda larvae

Utilization of Insecticide-Treated Nets in Households for Under-5 Children and Associated Factors in East Mesekan District, Gurage Zone, Southern Ethiopia

Introduction: Insecticide-treated nets (ITNs) are widely used tools that have been proven effective in preventing and controlling malaria. However, usage varies among households and can greatly affect the benefits of ITNs. Thus, this study aimed to assess the household utilization of insecticide-treated nets and its associated factors for under-5 children. Methods: A cross-sectional study was conducted in March-April 2020 in the East Mesekan district. A total of 591 households with under-5 children were chosen by using a systematic random sampling approach for the interviews. The data was collected using a pretested questionnaire. Epi-Data version 3.1 was used to enter data and SPSS version 21 for analysis. A P -value of .05 was considered statistically significant. Results: In this study, 58.2% (95% CI: [54.1%-62.2%]) of household participants used ITN for children under 5 years of age while sleeping the night before the survey. The study participants’ overall knowledge and practice of malaria prevention were 27.1% and 23.9%, respectively. Having a family size of less than 5 (AOR = 0.60, 95% CI: [0.37-0.98]) and complaints of skin irritation (AOR = 0.43, 95% CI: [0.29-0.63]) significantly decreased ITN utilization. However, having 1 ITN (AOR = 2.15, 95% CI: [1.15-4.02]) or 2 ITNs (AOR = 2.58, 95% CI: [1.51-4.39]), as well as low (AOR = 2.07, 95% CI: [1.33-3.20]) and medium (AOR = 1.83, 95% CI: [1.11-3.02]) knowledge of ITN importance, increased ITN utilization significantly. Conclusions: The households’ use of ITNs for children under the age of 5 was inadequate. It was significantly associated with having a family size of less than 5, complaints of skin irritation, owning 1 or 2 ITNs, and having low and medium knowledge of its importance. It is recommended that continuous and progressive health awareness about the consistent use of ITN for malaria prevention in the study area be promoted

Suicidality and homelessness: prevalence and associated factors of suicidal behaviour among homeless young adults in Southern Ethiopia

Abstract Background Research indicates that homelessness is associated with an increased risk of suicide. While street homelessness is a global problem, it is a disproportionately serious concern in low- and middle-income countries such as Ethiopia. Despite their high risk of suicidal thoughts and attempts, there has been limited research on this subject among homeless young people in Ethiopia. Therefore, we assessed the prevalence and factors contributing to suicidal behaviour among homeless young people in the southern region of this country. Methods We conducted a community-based cross-sectional study from 15 June to 15 August 2020 involving 798 homeless young adults in four southern Ethiopian towns and cities. The Suicide Behaviour Questionnaire-Revised (SBQ-R) was used to assess suicidal behaviour. Data were coded and entered into Epi-Data version 7 and analysed using SPSS version 20. We conducted a multivariable logistic regression analysis to identify factors associated with suicidal behaviour. Variables with a p-value of < 0.05 were considered statistically significant. An adjusted odds ratio with a 95% confidence interval was determined to indicate the association’s strength. Results The overall prevalence of suicidal behaviour among young homeless individuals was 38.2% (95% CI: 34.8%, 41.5%). The lifetime prevalence of suicidal ideation, planning and attempt was 10.7% (95% CI: 8.6–12.9%), 5.1% (95% CI: 3.6–6.6%) and 3% (95% CI: 1.9–4.3%), respectively. A longer duration of homelessness (1–2 years) (AOR = 2.244, 95% CI: 1.447–3.481), stressful life events (AOR = 1.655, 95% CI: 1.132–2.418) and the stigma associated with homelessness (AOR = 1.629, 95% CI: 1.149–1.505) were significantly associated with suicidal behaviour. Conclusion The results of our study indicate that suicide is a serious public health problem among homeless young people in southern Ethiopia. We have found associations between suicidal behaviour and stressful events, homelessness lasting for one to two years and stigma. Our study suggests that policymakers and programme planners need to develop a strategy for preventing, detecting and managing suicidal behaviour among street-dwelling homeless young adults, a vulnerable and understudied population. A community-based suicide prevention campaign is also essential for street-dwelling homeless young people in Ethiopia