Fluoride Removal from Water Using Aluminium Modified Activated Carbon Prepared from Khat Catha Edulis Stem
| dc.contributor.advisor | Kebede Shimelis | |
| dc.contributor.author | Niyitegeka Hyacinthe | |
| dc.date.accessioned | 2021-11-18T09:29:40Z | |
| dc.date.accessioned | 2023-11-18T09:52:23Z | |
| dc.date.available | 2021-11-18T09:29:40Z | |
| dc.date.available | 2023-11-18T09:52:23Z | |
| dc.date.issued | 2021-07-10 | |
| dc.description.abstract | Fluoride is one of the most abundant elements found in Ethiopian groundwater and in manyother parts of the world, posing a significant threat to the regions’ groundwater supply. Thepresence of fluoride above the set limit of 1.5 mg/L in drinking water consumed by humans hasresulted in a variety of physical health issues such as dental and skeletal fluorosis. In theEthiopian Rift Valley, nearly 8 million people drink fluoride-contaminated water. The sameproblem has been seen in other regions such as the Kenyan and Tanzanian Rift Valleys. Thecurrent study describes the preparation of a low-cost adsorbent using aluminium-modifiedactivated carbon prepared from Khat (Catha edulis) stem as well as its adsorption effectivenessfor fluoride ion removal from aqueous solution. The fluoride adsorption capacity of the resultingmodified adsorbent was experimentally evaluated with batch adsorption experiments innumerous operating conditions, which include pH, adsorbent dose, and fluoride initialconcentration. The results showed that the modified activated carbon retained good fluorideperformance; with an adsorbent dose of 2.47 g/L, 87.9 % of 2.1 mg/L initial fluorideconcentration could be reduced from aqueous solution containing at pH 6.08 in 60 minutes. The adsorbent was applied to real drinking water samples collected from Tube, Wadesha, Dollessa,and Tejitu, and it was discovered that the concentrations of ground water collected from Tubeand Wadesha were reduced from 3.67 mg/L and 4.33 mg/L to 1.0 mg/L and 1.28 mg/L,respectively, and are within WHO permissible drinking water limits. The scanning electronmicroscopy (SEM) and Fourier transform-infrared spectroscopy (FTIR) were used to describemodified activated carbon and investigate the possible adsorption mechanism. The results showthat aluminium-modified activated carbon derived from khat (Catha edulis) has a reasonabledefluoridating capacity and could be used as an appropriate and effective adsorbent for a longtermsolution to the fluoride problem in drinking water with lower fluoride concentrations. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/28754 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Fluoride Removal Fluorosis Khat Catha Edulis Stem Adsorption | en_US |
| dc.title | Fluoride Removal from Water Using Aluminium Modified Activated Carbon Prepared from Khat Catha Edulis Stem | en_US |
| dc.type | Thesis | en_US |