Izuchukwu Emeka C., John Ebikienmo P., Ekesiobi Sandra U., Thompson Nwinam I., Okpoji Awajiiroijana U. & Etesin Monday U.·Asian Journal of Research in Zoology·2026
Surface waters in the Niger Delta remain critical sources of domestic water supply but are increasingly degraded by anthropogenic contamination. This study assessed heavy-metal contamination in the Nun River, Bayelsa State, Nigeria, and evaluated associated human health risks. Su...
Open access
Research Article10.9734/ajriz/2026/v9i1239
Ohaturuonye Sampson O., Okpoji Awajiiroijana U., Akpan Nsima A., Njoku Chukwunonso A., Isaac Stanley C., Etesin Monday U. & Ekwere Ifiok O.·Asian Journal of Research in Zoology·2025
Aquatic organisms inhabiting petroleum-impacted estuaries of the Niger Delta are frequently exposed to complex mixtures of heavy metals and hydrocarbons capable of inducing biochemical and physiological stress. This study evaluated the concentrations of Pb, Cd, Hg, As, Cr, and to...
Open access
Research Article10.9734/ajriz/2025/v8i4233
Umueni, Uchenna E., Rasheed Habib O., Edodi Iyam O., Aningo Gloria N., Okpoji, Awajiiroijana U., Etesin Monday U., Okonkwo Chidiebere C., Ekwere Ifiok O., Okeke Chioma F. & Anarah Samuel E.·Asian Journal of Agricultural and Horticultural Research·2025
The present study evaluated the extent of nutrient enrichment and eutrophication potential of the Otuoke River in Bayelsa State as influenced by agricultural runoff. Nine surface water samples were collected from three monitoring stations located upstream, midstream, and downstre...
Open access
Research Article10.9734/ajahr/2025/v12i4424
Izuchukwu Emeka C., Etukudo Nsikan J., Akpan Nsima A., Igwegbe Kelvin C., Edodi, Iyam O., Okpoji Awajiiroijana U. & Etesin Monday U.·Asian Journal of Geographical Research·2026
Groundwater from boreholes is the primary source of drinking water for many urban communities in the Niger Delta region of Nigeria. Rapid urbanisation, industrial activities, petroleum-related operations, and poor sanitation infrastructure have increased the vulnerability of grou...
Open access
Research Article10.9734/ajgr/2026/v9i1359
Ekesiobi Sandra U., Ekpe, John E., Okpoji, Awajiiroijana U., Hassan Dasuki H., Ekwere Ifiok O., Awortu Raymond C., Etesin Monday U., Nwofia Ugochukwu., Okeke Chioma F. & Nwankwo Austin O.·Asian Journal of Chemical Sciences·2025
This study evaluates the hydrochemical characteristics and trace-metal contamination of drinking-water sources in Brass Island, Bayelsa State, Nigeria, and assesses their potential health implications. Twelve water samples were collected from boreholes, hand-dug wells, and surfac...
Open access
Research Article10.9734/ajocs/2025/v15i6406
Osuafor Ogonna O., Okeke Chioma F., Agu Mathew O., Isueken Christian O, Aligwo Michael C., Ohaturuonye Sampson O., Okpoji, Awajiiroijana U, Etesin Monday U. & Ekwere Ifiok O.·Asian Journal of Agricultural and Horticultural Research·2025
Agricultural runoff is a major global non-point source of water contamination, contributing substantially to nutrient enrichment, heavy metal loading, and hydrogeochemical alteration in freshwater systems, particularly in humid tropical regions. This study assessed the influence...
Open access
Research Article10.9734/ajahr/2025/v12i4427
Ogbaji Henderson O., Akpan Nsima A., Ijioma Chinonye C., Okpoji Awajiiroijana U., Eze Victor C., U., Obi Justina N., Martins Ndidi P. & Etesin Monday U.·Asian Journal of Geographical Research·2025
This study examined the seasonal variation in hydrocarbon contamination of sediments and biota within the Bonny Estuary, Rivers State, Nigeria. Samples of sediment, surface water, and fish were collected during the dry and wet seasons and analysed for total petroleum hydrocarbons...
Open access
Research Article10.9734/ajgr/2025/v8i4341