Nkoli M. Mgbemena

Michael Okpara University of Agriculture Umudike Abia State Nigeria · Chemistry

Organic and inorganic nitrogen ions in the environment play important role across environmental matrices. Rainwater samples collected from ambient and different roofing surfaces (zinc, aluminium, asbestos and stone-coated roofing sheets) from selected locations at Ogale, Rumuodomaya/Rumuodome, Diobu and Chokocho within Rivers State, Niger Delta, Ni...

Total petroleum hydrocarbons (TPHs)—(aliphatic and aromatic) were analysed for in atmospheric rainwater between April–June; July–August; September–October depicting early, mid, late rain of 2019. Sampling at Rumuodomaya/Rumuodome and Ogale in Rivers State using basins fastened to a Table 2M above ground and 120 M from high features, Rainwater was a...

The concentrations of heavy metals (Pb, As, Cr, Cu, Cd and Fe) were determined in the gills, liver and muscles of thirty-five fishes, water and sediment samples from Aba River using atomic absorption spectrophotometer. Heavy metal concentrations varied markedly among fish species and organs. Results revealed that Pb, Cr, Fe had maximum concentratio...

The leaf extract of Ficus capensis is used in some part of Nigeria as blood booster, this motivates the researchers on the need to assess the phytochemical, proximate, mineral and antibacterial compositions of the leaf, seed, stem and root of the plant. The various parts of Ficus capensis were got from a farm land in Umuahia and analysed for phytoc...

Total petroleum hydrocarbons (TPHs)-(aliphatic and aromatic) were analysed for in atmospheric rainwater between April- June; July – August; September–October depicting early, mid, late rain of 2019. Sampling at Rumuodomaya/ Rumuodome and Ogale in Rivers State using basins fastened to a table 2 M above ground and 120 M from high features, Rainwater...

Background A critical decrease in the number of healthcare providers in developing countries is one of the major burdens to healthcare access in these countries. Many factors contribute to the lack of healthcare providers, including low doctor-to-population ratio, emigration of doctors to other countries, long travel distances to hospitals, increas...

This work studied the removal of Zn2+ from aqueous solution using unmodified and citric acid modified groundnut seed shell. Batch experiment was carried to ascertain the effects of adsorbent dose, particle size, and contact time on such adsorption with initial metal ions concentration of 100 mg/l at a temperature of 25 oC and pH of 7.5. It was dedu...

This study examined the physicochemical parameters of fish pond water to ascertain if they pose any risk to the environment after disposal. Water samples were collected from metallic, tarpaulin and concrete ponds from Anambra, Imo and Lagos states, Nigeria and analysed for minerals and physicochemical parameters using standard analytical methods. T...

The South-Eastern Nigeria has heavy annual rainfall and at riskof leaching by acid rain hence there is a strong need to study the acidity of the leaching water from this zone as to determine it’s effect on the fertilizer components applied to the soil as soil and water pH affect nutrient retention. The study was therefore conducted to determine the...

The large volume of cassava peels derived from gari processing activities is usually discarded as waste and allowed to decay in the open causing damage to the environment, thus resulting in several health-related issues. In this study, glucose concentrations were determined from the fermentation of cassava waste peels using an ultrasound machine. G...

Ocimum gratissimum (fam.Lamiaceae) ‘Scent leaf’ and Vernonia amygdalina (fam.Asteraceae) ‘Bitter leaf’ are commonly consumed vegetables in Southern Nigeria. O. gratissimum is used by the ‘Igbos’ of South East Nigeria to flavor soups and stews while it is popular with the ‘Yorubas’ of South West Nigeria for treatment of stomach disorders. V. amygdal...

This study investigated the occurrence and abundance of microplastics in surface sediments from four beaches in Lagos State, Nigeria. The beaches are Alpha, Oniru, Eleko and Lekki. Microplastics were taken from the sediments by floatation method. The number of microplastics in 50 g of dry sediment were counted with a photo microscope and results we...

Children of street vending mothers are exposed to hazardous risks from the vending environment, for example, air pollution, noise pollution, and lack of sanitary resources. However, street vending provides an opportunity for mothers to support the basic needs of their children. Lack of adequate resources and alternative care for children force some...

The removal of Cr6+ from aqueous solution using unmodified and hydrochloric modified African nutmeg pod was studied. The effects of particle size, pH and initial metal ions concentration adsorbed were investigated. The amount of metal ion adsorbed increased as the initial metal ion concentration increased and also decreased at low pH of 2 for both...

The study focused on the proximate, minerals and phytochemical analysis of the leaves, seeds, seed coats and peels of Irvingia gabonensis and Irvingia wombolu from Uli in Anambra State Nigeria. The minerals concentrations (Ca, Zn, Fe, Mg) were determined with atomic absorption spectrometer (AAS) while sodium was determined with flame photometer. Th...

The concentrations of polychlorinated biphenyls (PCBs) in sediment samples from the New Calabar River in the Niger Delta Region of Nigeria were determined. Grab sediment samples were collected from five stations in the river and analyzed for individual PCB congeners using gas chromatography - mass spectrometer. The Σ 8 PCB (sum of eight congeners)...

This study investigated the status of heavy metals pollution in the sediments of New Calabar River in Rivers state, Nigeria. Grab sediment samples were collected from ten locations and analysed for lead (Pb), cadmium (Cd), chromium (Cr), zinc (Zn) and copper (Cu) using atomic absorption spectrophotometer (AAS). Geo-accumulation index (Igeo), contam...

Inhibitive effects of Schiff's base, 4-hydroxy phenyl elhyIidene-2-(l-phenyl ethylidene) hydrazine carbothioamide (4-HPMHC) on the corrosion of zinc in H2SO4 at temperatures 303 K, 313 K and 323 K were studied using weight loss method. Inhibition efficiency of 4-HPMHC was found to depend on concentrations of inhibitor and the acid, temperature of t...