Eyobel Mulugeta

• PhD
• Senior Researcher at Ethiopian Bio and Emerging Technology Institute

Cement, a fundamental component of concrete, holds significant importance in global construction and infrastructure development. Despite being predominantly produced and consumed locally, the impact of cement extends globally, particularly in terms of energy consumption and greenhouse gas (GHG) emissions. Uncertainties surround the quantification o...

Cement production is a major contributor to global CO₂ emissions, responsible for approximately 5–10% of total emissions, with the challenges being even more pronounced in developing nations like Ethiopia. This study investigates the potential of cellulose nanocrystals (CNCs), derived from sugarcane bagasse, as supplementary cementitious materials...

Conventional water treatment methods often fail to remove natural organic matter (NOM), leading to the formation of harmful disinfection by-products in chlorinated water. This study aimed to develop a synergistic, local soil–aluminum sulfate (alum) composite material to enhance NOM removal from real water samples. Locally derived soil (chalaltu) sa...

This study evaluated the seasonal performance of the Koka water treatment plant in removing natural organic matter (NOM) and the implications for disinfection by-product (DBP) formation potential. Raw and treated water samples were collected during the dry and wet seasons and analyzed using physicochemical parameters and fluorescence spectroscopy....

Rooftop rainwater harvesting has been used worldwide as an alternative source of water supply for many people. In view of this, the aim of the study is to assess the potential of rooftop rainwater harvesting as an alternative source of water supply for Wachemo University. Twenty years of rainfall data were analyzed to determine the average monthly...

In the realm of cement production, clinker-producing factories emerge as both energy and material-intensive entities, emitting a substantial array of primary pollutants into the environment compared to their non-clinker-producing counterparts. This study investigates the emissions from clinker-producing cement factories in Ethiopia and their impact...

This study addresses the limited understanding of factors affecting the efficiency of water treatment plants in reducing trihalomethane (THM) formation through total organic carbon (TOC) removal, highlighting significant challenges in improving treatment effectiveness. The aim of this study was to examine the influence of water quality on the effic...

In the realm of cement production, clinker-producing factories emerge as both energy and material-intensive entities, emitting a substantial array of primary pollutants into the environment compared to their non-clinker producing counterparts. Our study delves into Ethiopian clinker-producing cement factories, unraveling the concentration of primar...

One in every three people in the world still lacks access to clean drinking water. Aside from microbiological pollution, high fluoride content in drinking water is one of the most serious problems in African countries. This study aimed to contribute to the availability of clean water by developing a point-of-use drinking water purifier using an alu...

Prosthetic shank is one of the prominent parts of prosthetic leg that transfers load from prosthetic socket to the foot section. Nowadays, it is common to use composite materials for prosthetics and orthotics applications. This research aims at synthesis and characterization of properties of crystalline nanocellulose (CNC) powder and investigating...

About two-third of Ethiopian diet consists of Injera which is prepared from the flour of tef (Eragrostis tef (Zucc) Trotter), water and starter. Even though it is a nutritious food, the shelf life of Injera does not exceed 3 days. The aim of this study was to evaluate the effect of green synthesized silver (AgNPs) and zinc oxide (ZnONPs) nano parti...

The objective of this study was to examine the level of heavy metals and alkali metals in soil, cabbage and water samples collected from Qoka Negewo, where Mojo River is used for irrigation. Mixture of nitric acid, perchloric acid, and hydrogen peroxide was used for optimizing the wet digestion method for soil and cabbage samples. One way anova tes...

This study analysis physicochemical property and some heavy metals levels of honey from three-district area of East Gojjam Zone, Ethiopia. The samples were collected purposively from the most potential beekeeping Woredas namely Debre Markos, Dejen, and Bichena. The results of pH, electric conductivity, moisture, total solid, ash content, free acidi...

This study investigated physicochemical properties and pesticide residue levels of honey from West Shewa Zone, Ethiopia. The results of moisture, electrical conductivity, pH, free acidity, reducing sugar, sucrose, ash, and total solids were found to be 16.61–18.64%, 0.384–0.646 mS/cm, 3.77–4.22, 7.42–13.87 meq/kg, 61.38–72.87%, 6.84–15.94%, 0.030...

This study presents the proximate and mineral composition analysis of Moringa oleifera and Moringa stenopetala leaves collected from two different agro-ecological zones namely Arbaminch Zuria and Konso in Southern Nation Nationalities and Peoples Region (SNNPR), Ethiopia. M. oleifera and M.stenopetala leaves were collected using random sampling met...

This study presents the proximate and mineral composition analysis of Moringa oleifera and Moringa stenopetala leaves collected from two different agro-ecological zones namely Arbaminch Zuria and Konso in Southern Nation Nationalities and Peoples Region (SNNPR), Ethiopia. M. oleifera and M. stenopetala leaves were collected using random sampling me...

In this study, the removal of fluoride from water using aluminium hydroxide based adsorbent has been investigated in continuous operation. The effect of fluoride influent concentration, feed flowrate, and adsorbent bed height onto the breakthrough characteristics of the adsorption system were examined. The fixed-bed adsorption system was found to p...

In this study, the performance of different aluminium hydroxide-based adsorbents was compared in terms of fluoride adsorption capacity, potential for repetitive regeneration, surface acidity and surface site concentrations. The adsorbents were aluminium hydro(oxide) (AO), activated alumina (AA), and pseudoboehmite (PB). The AO adsorbent was synthes...

In this study the fluoride removal potential of nanoscale aluminium oxide hydroxide (nano-AlOOH) has been investigated. The material was produced using aluminium nitrate (Al(NO3)3.9H2O, 95%), and ammonium bicarbonate (NH4HCO3, 98%) and its density and mineralogy were investigated. A series of batch adsorption experiments were carried out to assess...

In this study, aluminium oxide–manganese oxide (AOMO) composite material was synthesized, characterized, and tested for fluoride removal in batch experiments. AOMO was prepared from manganese(II) chloride and aluminium hydroxide. The surface area of AOMO was found to be 30.7 m2/g and its specific density was determined as 2.78 g/cm3. Detailed inves...

In this study, the properties and fluoride-uptake capacity of aluminum hydroxide-based (AO) adsorbent has been investigated. AO was synthesized, characterized, and tested in batch and column experiments. The surface area of the AO was found to be 37.7m2 g -1. The composition was determined to be 90% Al(OH)2.8(SO4)0.1 (or 78.3% Al(OH)3 plus 10.7% Al...

Geogenic contamination of groundwater with fluoride in the Rift Valley of Ethiopia and its mitigations Z.FELEKE*, E.MULUGETA, A.ALEMUAND B.S.CHANDRAVANSHI Department of Chemistry, Faculty of Science, Addis Ababa University, P. O. Box 1176, Addis Ababa, Ethiopia (*correspondence: zewge@chem.aau.edu.et) Excessive and undesirable level of fluoride...