1. Ahmadpour, A., Tahmasbi, M., Bastami, T. R., & Besharati, J. A. (2009). Rapid removal of cobalt ion from aqueous solutions by almond green hull. Journal of Hazardous Materials, 166(2-3), 925-930.
2. Bhatnagar, A., Minocha, A. K., & Sillanpää, M. (2010). Adsorptive removal of cobalt from aqueous solution by utilizing lemon peel as biosorbent. Biochemical Engineering Journal, 48(2), 181-186.
3. Çimen, A., Bilgiç, A., Kursunlu, A. N., Gübbük, İ. H., & Uçan, H. İ. (2014). Adsorptive removal of Co (II), Ni (II), and Cu (II) ions from aqueous media using chemically modified sporopollenin of Lycopodium clavatum as novel biosorbent. Desalination and Water Treatment, 52(25-27), 4837-4847.
4. Fang, F., Kong, L., Huang, J., Wu, S., Zhang, K., Wang, X., ... & Liu, J. (2014). Removal of cobalt ions from aqueous solution by an amination graphene oxide nanocomposite. Journal of hazardous materials, 270, 1-10.
5. Imran Din, M., Mirza, M. L., Ata, S., Athar, M., & Mohsin, I. U. (2013). Thermodynamics of biosorption for removal of Co (II) ions by an efficient and ecofriendly biosorbent (Saccharum bengalense): kinetics and isotherm modeling. Journal of Chemistry, 2013.
6. Owa, F. D. (2013). Water pollution: sources, effects, control and management. Mediterranean journal of social sciences, 4(8), 65.
7. Owa, F. W. (2014). Water pollution: sources, effects, control and management. International Letters of Natural Sciences, 3.
8. Repo, E., Kurniawan, T. A., Warchol, J. K., & Sillanpää, M. E. (2009). Removal of Co (II) and Ni (II) ions from contaminated water using silica gel functionalized with EDTA and/or DTPA as chelating agents. Journal of hazardous materials, 171(1-3), 1071-1080.
9. Lesmana, S. O., Febriana, N., Soetaredjo, F. E., Sunarso, J., & Ismadji, S. (2009). Studies on potential applications of biomass for the separation of heavy metals from water and wastewater. Biochemical Engineering Journal, 44(1), 19-41.
10. Ojedokun, A. T., & Bello, O. S. (2016). Sequestering heavy metals from wastewater using cow dung. Water Resources and Industry, 13, 7-13.
11. Kotrba, P. (2011). Microbial biosorption of metals—General Introduction. In Microbial biosorption of metals (pp. 1-6). Springer, Dordrecht.
12. Sivaprakash. B, N.Rajamohan and A. Mohamed Sadhik, (2010). Batch and column sorption of heavy metal from aqueous solution using a marine alga Sargassum tenerrimum, International Journal of ChemTech Research, 2(1),155-162
13. Sivaprakash, B and N. Rajamohan (2011). Equilibrium and Kinetics Studies on the Biosorption of As (III) and As (V) by the Marine Algae Turbinaria conoides, Research Journal of Environmental Sciences, Science Alert, 5 (10), 20, 779-789