Adama University

About: Adama University is a education organization based out in Nazrēt, Ethiopia. It is known for research contribution in the topics: Population & Adsorption. The organization has 840 authors who have published 1010 publications receiving 5547 citations. The organization is also known as: Adama Science and Technology University & ቴክኖሎጂ ዩኒቨርሲቲ, አዳማ ሳይንስና ቴክኖሎጂ ዩኒቨርሲቲ.

Design of Slow Sand Filter Technology for Rural Water Treatment in Girei, Adamawa State, North Eastern Nigeria

Abstract: Treatment of water has a great influence on the use of water for domestic use both in rural and urban areas. Slow sand filtration involves the use of beds of sand for the filtration of water. The reason for designing slow sand filter for rural water treatment is to make treatment of water easy and qualitative. This research involves the use of three tanks, filter beds, filter media and filtrate tanks. Raw water is filtered by the layers of different sand particles, and conveyed by pipe after filtration to the filter media that has diatomite as the sieving agent which filters the water before been conveyed into the filtrate tank. From test carried out, the result shows that slow sand filter with filter technology is moderately efficient for water treatment. The design of slow sand filter technology applied appropriate technology; hence the ease of filtering raw water as well as improvement in taste and odor of water being treated was achieved. However, chemical and biological contaminants were not considered in this research. Original Research Article Ankidawa and Tope; AJEE, 3(3): 1-7, 2017; Article no.AJEE.34395 2

Perceptions and practices of multicultural education among Ethiopian secondary teacher education program officials, teacher educators and prospective teachers

Abstract: This study explores the perceptions and practices of multicultural education among Ethiopian secondary teacher education program officials, teacher educators and prospective teachers. To that end, data were collected from secondary teacher education program officials, teacher educators and student teachers using questionnaire and interview. The data were analyzed by employing mixed methodologies. The study revealed that while Ethiopian secondary teacher education program officials and teacher educators have awareness about multicultural education, the prospective teachers’ awareness was found to be very low. Furthermore, there are inadequate practices of multicultural education in the secondary teacher education institutions. Suggestions which may enhance the implementation of multicultural education in the secondary teacher education program of the country and beyond are discussed in the article.

Synthesis of Magnetically Recoverable Ru/Fe3O4 Nanocomposite for Efficient Photocatalytic Degradation of Methylene Blue

Abstract: Photocatalytic degradation of pollutants is considered to be an effective green method to remove organic dyes from contaminated water. This research work presents the synthesis of a magnetically recoverable ruthenium-magnetite (Ru/Fe3O4) nanocomposite for the photocatalytic degradation of methylene blue (MB) in an aqueous solution under UV and sunlight radiation. The magnetic Ru/Fe3O4 nanocomposite is synthesized in a single step using the chemical co-precipitation method. The synthesized nanocomposite sample is characterized by various techniques, including, XRD, FT-IR, SEM, TEM, TEM–EDX, XPS and VSM whereas the photocatalytic degradation of MB is analyzed by the UV–Vis spectrophotometer. The formation of ruthenium nanoparticles in magnetic Fe3O4 has been confirmed by TEM, TEM–EDX and XPS studies. The catalytic activity of the synthesized Ru/Fe3O4 nanocomposite is evaluated by photodegradation of the MB dye aqueous solution under UV and sunlight radiation. The influences of various operation parameters on photocatalytic degradation such as pH, dye initial concentration and catalyst dosage are examined. The results revealed a complete photocatalytic degradation of MB in the aqueous solution occurred by exposure to both UV and sunlight radiation. Furthermore, the photocatalytic degradation of MB under UV light is faster than sunlight. The photocatalytic degradation reaction of MB is found to be consistent with the pseudo-first-order kinetics. The strong ferromagnetic nature of Fe3O4 enables the nanocomposite to be separated from the solution for recycling and has a photocatalytic efficiency of greater than 90% for up to five cycles. The synthesized Ru/Fe3O4 photocatalyst efficiently degrades MB dye, so it can be used as a potential catalyst for the removal of MB in aqueous solutions.

A Numerical Study on Cross Diffusion Cattaneo-Christov Impacts of MHD Micropolar Fluid Across a Paraboloid

Abstract: Analyzing the impacts of Cattaneo-Christov flux, bioconvective Raleigh number and cross diffusion effects in electrically conducting micropolar fluid through a paraboloid revolution is assessed in this work. Non-dimensional equations are solved numerically using shooting technique with an aid of Matlab software. The impact of various parameters on velocity, temperature and concentration are discussed in detail and presented graphically. Harman number and micro rotation parameters are found and have an increasing influence on shear stress. The vertical velocity increases at free stream and the horizontal velocity increases near the surface when Grb increases, which follows the opposite trend for accumulation of Rb. The numerical results are compared with the available data indicating good agreement in a limiting case.