1. Department of Applied Chemistry, Adama Science and Technology University, P.O.Box 1888, Adama, Ethiopia
2. Department of Chemistry, Chemical Engineering and Applied Chemistry Chungnam National University, Daejeon, 34134, Republic of Korea
3. Environmental Science Program, Haramaya University, P.O. Box138, Dire Dawa, Ethiopia
4. Research Institute of Materials Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea