Okpoji Awajiiroijana U., Orji-Azuka Loveth N., Igwegbe Kelvin C., Ekwere Ifiok O., Ewuola Akinola A., Garuba Muhammed H. & Etukudo Esther W.·Asian Journal of Geological Research·2025
Urban rivers in Nigeria are increasingly affected by detergent residues, domestic wastewater, and trace-metal inputs associated with rapid urbanisation. This study assessed the physicochemical characteristics, surfactant concentrations, and selected heavy metals in three urban ri...
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Research Article10.9734/ajoger/2025/v8i3223
Garuba Muhammed H., Okpoji Awajiiroijana U., Ajawobu Innocent O., Oji Chihurumnanya O., Obinna Vincent O., Abdulwahab Nazeemdeen A., Jerry Joseph, Onyeyili Ikemefuna N., Ezekwueme Obianuju I. & Otabor Osaretin W.·Asian Journal of Food Research and Nutrition·2026
Background: Street-vended foods constitute an important source of affordable meals in urban centres but may contain chemical contaminants that pose potential public health risks. Aim: This study assessed the levels of chemical contaminants in street-vended foods and evaluated the...
Open access
Research Article10.9734/ajfrn/2026/v5i3429
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
Eboh-Ajoku Ogechi I., Oji Chihurumnanya O., Okpoji Awajiiroijana U., Ene Chidiebere B., Osuagwu Eze L., Ohaturuonye Sampson O., Sulaiman Luqman O., Umeghalu Christian Okechukwu, Nosike Elvis I., Obieje Ann C. & Tolase Augustinah O.·Asian Journal of Food Research and Nutrition·2026
Persistent organic pollutants (POPs) pose significant food safety and public health concerns due to their persistence, bioaccumulation and toxicity in aquatic food products. This study assessed the concentrations of organochlorine pesticides (OCPs), polychlorinated biphenyls (PCB...
Open access
Research Article10.9734/ajfrn/2026/v5i3433
Umueni Uchenna E., Ogbaji Henderson O., Okpoji Awajiiroijana U., Osuagwu Eze L., Akpan Nsima A., Ekpe John E., Okabekwe Veraline C., Anumaka Collins C., Obiefuna Grace C. & Warder Amaminor B.·Asian Journal of Geological Research·2026
Rivers in the Niger Delta deliver vital ecological and economic benefits but face increasing pressures from human activities that disrupt hydrology and harm sediment quality. This research assessed the hydrological features, sediment condition, and ecological risks of the Orashi...
Open access
Research Article10.9734/ajoger/2026/v9i1230
Groundwater is the primary source of domestic water supply in Yenagoa, Bayelsa State, yet increasing urbanisation and poor sanitation practices raise concerns about its quality and potential health implications, particularly around surface water bodies such as Epie Creek. This st...
Open access
Research Article10.9734/ajopacs/2026/v14i1279
Eyibara, Oghenehokoke U., Abia Uwem B., Asuaiko Ekpedeme R., Okpoji Awajiiroijana U., Iikediuwa, Sandra C., Omuluche, Collins O., Nwauzor J. N., Nwanekwu Akunna M., Onuchukwu Ejikeme E. & Isaac Stanley C.·Asian Journal of Geological Research·2026
Coastal sediments act as repositories and potential secondary sources of contaminants, while their physicochemical characteristics influence the retention, mobility, and bioavailability of heavy metals. In the Niger Delta, increasing anthropogenic pressures have raised concerns a...
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Research Article10.9734/ajoger/2026/v9i3296
Onuchukwu Ejikeme E., Omuluche Collins O., Usiabulu Godsday I., Okpoji Awajiiroijana U., Cookey Cookey I., Akpan Nsima A., Fabis Manasseh & Anumaka Collins C.·Asian Journal of Chemical Sciences·2026
Background: Produced water is the largest waste stream generated during petroleum exploration and production and may contain chemical constituents that can cause adverse environmental impacts if inadequately managed. Aim: This study comparatively characterised the chemical compos...
Open access
Research Article10.9734/ajocs/2026/v16i5469
Onuchukwu Ejikeme Elozona, Umeghalu Christian Okechukwu, Nkwocha Kelechi Friday, Okpoji Awajiiroijana U., Nwafor Ernest Kelechukwu, Chinonso Benjamin Iheabunakem & Osaretin Williams Otabor·Asian Journal of Applied Chemistry Research·2026
This study characterised aquifer systems and evaluated groundwater quality in twelve gully erosion-prone communities of Orlu, Imo State, Nigeria, through integrated hydrogeophysical and hydrochemical methods. Twelve vertical electrical soundings using the Schlumberger configurati...
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Research Article10.9734/ajacr/2026/v17i3412
Heavy metal inputs from petrochemical industries, fertiliser plants, oil and gas operations, and intensive farming increasingly impact agricultural soils in industrialised parts of the Niger Delta. These metals persist in soils, influence soil quality, and pose ecological and hum...
Open access
Research Article10.9734/ajahr/2026/v13i1436
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
Omuluche Collins O., Ibe Kizito Chidozie, Amuka Johnpaul Onyenezi, Nwauzor J. N., Okpoji Awajiiroijana U., Garuba Muhammed Hatim, Ejiofor Callista Onyinyechukwu, Opara Ginikachi Joseph, Otuuh Azubuike Gladstone, Omowonuola Omolayo E. & Isaac Stanley C.·Journal of Energy Research and Reviews·2026
The increasing generation of plantain (Musa paradisiaca) residues presents both a waste-management challenge and an opportunity for renewable-energy recovery. This study investigated the anaerobic digestion of plantain residues for biogas production and optimised the process usin...
Open access
Research Article10.9734/jenrr/2026/v18i11550
Ohaturuonye Sampson O., Ekwere Ifiok O., Ekesiobi Sandra U., Robinson Bright E., Okpoji Awajiiroijana U., Osuagwu Eze L. & Okpanachi Clifford B.·Asian Journal of Research in Zoology·2026
Heavy metal contamination of aquatic environments poses significant ecological and public health concerns in the Niger Delta, where fish constitute a major source of animal protein. This study assessed and compared the concentrations of ten heavy metals in farmed catfish from fiv...
Open access
Research Article10.9734/ajriz/2026/v9i1243
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...
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Research Article10.9734/ajriz/2026/v9i1239
Angela Atata, Victor Chukwuemeka Eze, Chihurumnanya Ola Oji, Peter Izuoba Okoye, Omuluche Collins O., Okpoji Awajiiroijana U., Alieze Anthony Bishop & Joseph Jerry·Asian Journal of Applied Chemistry Research·2026
Background: Polycyclic aromatic hydrocarbons (PAHs) are persistent organic contaminants capable of accumulating in aquatic sediments and posing ecological concerns in estuarine environments exposed to petroleum-related and other anthropogenic activities. The Ataba–Bodo estuarine...
Open access
Research Article10.9734/ajacr/2026/v17i4425
Angela Atata, Ohaturuonye Sampson O., Omuluche Collins O., Nwanekwu Akunna Maureen, Usiabulu Godsday I., Okpoji Awajiiroijana U., Osuagwu Eze Lloyd & Joseph Jerry·South Asian Journal of Parasitology·2026
This study assessed the parasitological profiles of fish from petroleum-impacted freshwater ecosystems in Delta State, Nigeria, and examined spatial associations between petroleum contamination and parasite burden. A total of 300 fish representing six freshwater species were coll...
Open access
Research Article10.9734/sajp/2026/v9i4312
Omuluche Collins O., Ogbaji Henderson O., Usiabulu Godsday I., Cookey Cookey I., Oji Chihurumnanya O., Okpoji Awajiiroijana U., Isaac Ukeme O., Edodi Iyam O. & Garuba Muhammed H.·Journal of Energy Research and Reviews·2026
Background: Biodiesel production from waste and locally available plant oils may support renewable fuel development while valorising lipid resources. Aim: This study comparatively evaluated biodiesel yield, fuel properties and oxidative stability of biodiesel produced from waste...
Open access
Research Article10.9734/jenrr/2026/v18i9534
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
Groundwater is an important source of water supply in the Niger Delta, and its chemistry reflects interactions between recharge water and aquifer materials. This study characterised the hydrogeochemistry of selected Niger Delta aquifer systems and assessed mineral–water interacti...
Open access
Research Article10.9734/ajgr/2026/v9i4473
Ekesiobi Sandra U., Thompson Nwinam I., Akpan Nsima A., Okeke Nkeiruka P., Ohaturuonye Sampson O., Okabekwe Veraline C., Dare Blessing E. & Okpoji Awajiiroijana U.·Asian Journal of Chemical Sciences·2026
Urban water resources in the Niger Delta are increasingly impacted by rapid urbanisation, inadequate waste management, and diffuse anthropogenic inputs. This study evaluated the integrated physicochemical quality and non-carcinogenic human health risks associated with domestic wa...
Open access
Research Article10.9734/ajocs/2026/v16i1423
Samuel Oji Iheukwumere, Modestus Ohaegbulem, Okoye Chinenye V., Gambo Farida, Bassey Aniekpeno B., Eyibara Oghenehokoke U., Omuluche Collins O., Angela Atata, Okpoji Awajiiroijana U., Obi Justina N. & Monday William T.·International Journal of Pathogen Research·2026
Petroleum contamination of coastal soils poses significant environmental concerns due to the persistence and ecological toxicity of petroleum hydrocarbons. This study evaluated the potential of indigenous microorganisms for the bioremediation of petroleum-contaminated coastal soi...
Open access
Research Article10.9734/ijpr/2026/v15i5489