Browsing by Author "Getachew, Girum"

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    The State of Newspaper Readership in Addis Ababa: Capital and Addis Fortune Newspapers in Focus
    (Addis Ababa University, 2016-12) Getachew, Girum; Lencho, Negeri (PhD)
    The purpose oft his study was to find out the state of pri vate newspapers readership with empha sis on two newspapers: Capital and Addis FOltune. It majorly identified the readers of the two newspapers and tried to sing le out their respective reasons for read ing the newspapers and ti.J11ctions that motivated readers to read frequent ly. In formed by Uses and Gratification theory as a theoretical fi'ame work, the study employed both qual itative and quantitati ve approaches through target respondents identi fied by probableand quota sampling with data collection tools or techniques involving questionnaire and interviews. More than 212 readers and nonreaders were selected as participant of the study. Surpri sing find ing obtained from this research is that there arc high tendencies of readership for female married educated readers than male married educated readers and diploma holding ladies ha vc high readership than male with the same educational status. More overeonsi steney is seen with women who have interest in reading the newspaper than male even in a change of Ii res tyle of singleness to marriage. Thestudyalso indicates that majority of people reading pri vate newspapers of Capital and Addis Fortune is you nger aged, employed, single and degree hold er men.lt also showed that the ma in reasons to ) read both newspapers includesearching new jobs, getti ng information of important things, broadening horizon of general knowledge and looking for ways of improving self The conclusion to this study shows readers have high frequency of readership but low readership in terms of spending time and pages covered.
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    Zeolites and Mixed Oxides in the Removal of Cr (Vi)
    (Addis Ababa University, 2014-06-06) Getachew, Girum; Diaz, Isabel (Professor); Pérez, Eduardo (PhD)
    In this work, different natural zeolites, namely Clinoptilolite (Mexico) and Sample 7 (Ethiopia), mesoporous material SBA-15 calcined and uncalcined as well as mixed oxides Hydrotalcite and SBA-15 supported hydrotalcite were employed for removal of chromate from aqueous solution. This materials show adsorption capacity with different mechanisms and ion (cation and anion) exchange properties. UV-Vis spectroscopy was used for determining the concentration of Cr (VI) before and after the treatment. Obtained data from chromate adsorption experiments over the mentioned materials were compared. It was shown that adsorption data for natural zeolite was very good having 66.5% and 74.5% adsorption capacity for Clinoptilolite and Sample 7, respectively. Maximum chromate adsorption was found over mixed oxides: 98.4% and 88.7% for SBA-15/HT and HT, respectively. It was much greater than that of the natural zeolites and mesoporous materials. For comparison purpose, pure silica mesoporous materials calcined and uncalcined SBA-15 were tested, showing retaining capacity of 13.6% and 39.89%, respectively. Finally, SBA-15/HT composite appears as a promising adsorbent for removal of chromate ion from waste waters.