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Papers
8 resultsShowing papers from Open University of Tanzania
ClearEvaluation of Toxicological Risks and Effects of Microplastics on Nile Tilapia (Oreochromisniloticus) under in Vitro Laboratory Conditions
This laboratory study evaluated the toxicological effects of microplastics on Nile tilapia (Oreochromis niloticus) under controlled conditions, finding measurable harm at the concentrations tested. The results have implications for managing fish health in aquaculture operations with microplastic-contaminated water.
Plastic debris facilitates the survival of multidrug-resistant bacterial pathogens in an urban agricultural environment
Researchers investigating urban farms in Tanzania found that plastic debris in soil and water harbored significantly higher concentrations of dangerous bacteria — including E. coli and Salmonella — than the surrounding soil or water, and that 69% of those bacteria were resistant to multiple antibiotics. The findings show that plastic waste can act as a reservoir that concentrates drug-resistant pathogens, posing risks to both farmers and food consumers.
Estimation of Different Categories of Healthcare Waste Generated at Two Different Hospital Categories in Four Hospitals in Dar es Salaam City
Researchers estimated the quantity and categorical breakdown of healthcare waste generated across four hospitals of varying levels in Dar es Salaam, Tanzania, finding differences in waste generation rates tied to hospital capacity and type, including infectious plastics and sharps.
Microplastics in irrigation water and vegetable garden soils adjacent to the Msimbazi river, Tanzania
Researchers examined microplastics in irrigation water from the Msimbazi River in Tanzania and adjacent vegetable garden soils, finding higher MP concentrations downstream (14.33 MPs per 10 mL) compared to upstream, with garden soils similarly elevated at 34 MPs per gram near the river. The most prevalent polymers were LDPE (18-21%) and PP (20-22%), highlighting contamination risks for food crops irrigated with polluted water.
Abundance and Distribution of Microplastics in Fish and Sediments from Coastal River Watersheds of Dar es Salaam, Tanzania
Researchers characterized microplastics in fish gastrointestinal tracts and sediments collected from coastal river watersheds and ponds in Dar es Salaam, Tanzania, using KOH digestion and flotation methods to determine the spatial distribution and extent of plastic pollution in urban watershed environments.
Reviewing the interdecadal dynamics of micropollutants in the Tanzanian coastal zone from 2002 to 2022
This review synthesizes 77 field research studies published between 2002 and 2022 on micropollutant dynamics in the Tanzanian coastal zone, covering occurrences, distribution levels, sources, and impacts of contaminants across a biodiversity-rich coastal ecosystem under increasing anthropogenic pressure.
Improper Disposal of Waste Water and Masks during COVID-19, and the Associated Increased Cycle of Infection to Human Health in Developing Countries: A Case Study of Tanzania
This study investigated wastewater and face mask disposal practices in Tanzania during the COVID-19 pandemic, finding widespread improper disposal that increases infection risks. Improperly discarded masks and wastewater contribute to environmental pollution including plastic waste in developing country settings.
Microplastics in Marine Sediments from Dar es Salaam Coast: Spatial Distribution and Characterization
Researchers found microplastic contamination in marine sediments at four beaches along the Dar es Salaam coast in Tanzania, with the highest concentrations near the surface layer. Identified polymers included polypropylene, polyethylene, polyurethane, and polyamide in fiber, fragment, sponge, and pellet forms.