Benjamin Botwe

PhD fellow


Benjamin Osei Botwe is employed at the University of Ghana as Assistant Lecturer in the Department of Marine and Fisheries Sciences. He belongs to the Chemical Oceanography group in his deparment. Benjamin holds a Master of Philosophy degree in Analytical/Environmental Chemistry and has 5 years of research experience in Environmental Analytical Chemistry. His previous research focused on metal and organic (e.g. pesticides and PAHs) contamination and their risk assessment in coastal and marine ecosystems as well as vegetable agro-ecosystems.


Historical Trends in Chemical Pollution and Sedimentation in the Tema Harbour, Ghana


  • Addo, M. A.; Affum, H.; Botwe, B. O.; Gbadago, J. K.; Acquah, S.A.; Senu, J.K.; Adom, T.; Coleman, A. (2012). Assessment of Water Quality and Heavy Metal Levels in Water and Bottom Sediment Samples from Mokwe Lagoon, Accra, Ghana. Research Journal of Environmental and Earth Sciences, 4(2): 119-130
  • Addo, M. A.; Darko, E. O.; Gordon, C.; Nyarko, B. J. B.; Gbadago, J. K.; Nyarko, E.; Affum, H. A.; Botwe, B. O. (2012). Evaluation of Heavy Metals Contamination of Soil and Vegetation in the Vicinity of a Cement Factory in the Volta Region, Ghana. International Journal of Science and Technology, 2(1): 40-50.
  • Botwe, B. O.; Ntow, W. J.; Carboo, D.; Nartey, V. K.; Kelderman, P.; Drechsel, P.; Gijzen, H. J. (2011). Pesticide residues contamination of vegetables and their public health implications in Ghana. Journal of Environmental Issues and Agriculture in Developing Countries, 3(2): 10-18.
  • Nyarko, E.; Botwe, B. O.; Lamptey, E.; Nuotuo, O.; Foli, B. A.; Addo, M. A. (2011). Toxic Metal Concentrations in Deep-Sea Sediment from Jubilee Oil Field and Surrounding Areas off the Western Coast of Ghana. Tropical Environmental Research, 9 & 10: 584-595
  • Nyarko, E.; Botwe, B. O.; Bampoe, A. A.; Addo, S.; Armah, A. K.; Ntow, W. J.; Kelderman, P. (2011). Organochlorine pesticide residues in Sardinella aurita from the coastal waters of Accra-Tema, Ghana and their potential health risks. Journal of the Ghana Science Association, 13 (1): 39-46.
  • Addo, M. A.; Okley, G. M.; Affum, H. A.; Acquah, S.; Gbadago, J. K.; Senu, J. K.; Botwe, B. O. (2011). Water quality and level of some heavy metals in water and sediments of Kpeshie Lagoon, La-Accra, Ghana. Research Journal of Environmental and Earth Sciences, 3(5): 487-497.
  • Nyarko, E.; Botwe, B. O.; Ogunnowo, O. O.; Oburu, N. C.; Addo, M. A.; Ofori-Danson, P. K. (2011). Organochlorine pesticide residues and heavy metals in two common dolphins from Ghanaian coastal waters. African Journal of Environmental Pollution and Health, 9(1): 50-59.
  • Nyarko, E.; Botwe, B. O.; Klubi, E (2011). Polycyclic aromatic hydrocarbons (PAHs) levels in two commercially important fish species from coastal waters of Ghana and their carcinogenic health risks. West African Journal of Applied Ecology, 19: 53-66.
  • Nyarko, E.; Botwe, B. O.; Ansong, J. E.; Delfanti, R.; Bassanti, M.; Schirone, A., Delbono, I. (2011). Determination of 210Pb, 226Ra and 137Cs in Beach Sands along the Coastline of Ghana. African Journal of Environmental Pollution and Health, 9(2): 18-24.
  • Ntow, W. J.; Drechsel, P.; Botwe, B. O.; Kelderman, P.; Gijzen, H. J. (2008). The impact of agricultural runoff on the quality of two streams in vegetable farm areas in Ghana. Journal of Environmental Quality, 37: 696-703.


  • Botwe, B. O.; Ntow, W. J.; Nyarko, E. (2012). Pesticide contamination in groundwater and streams draining vegetable plantations in the Ofinso District, Ghana. In: Hernandez-Soriano, M.C. (Ed.), Soil Health and Land Use Management, InTech, Rijeka, Croatia, pp. 51-66.
  • Ntow, W. J.; Botwe, B. O. (2011). Contamination status of organochlorine pesticides in Ghana. In: Loganathan, B. G. & Lam, P. K. S. (Eds), Global Contamination Trends of Persistent Organic Chemicals, CRC Press, Boca Raton, FL., USA, pp. 393-411.

Other information


He is currently enrolled in the PhD programme at IHE Delft Institute of Water Education in Delft, The Netherlands where he is conducting research into “Historical Trends in Chemical Pollution and Sedimentation in the Tema Harbour, Ghana”. Aspects of his research include the application of radiotracer (e.g. 210Pb and 137Cs) techniques to understand the transport and fate of chemical pollutants and sediments in the Tema Harbour. 

Funding Source: NFP  

Employer: University of Ghana