O. S. Edori

• BSc; MSc; Ph.D
• Lecturer at Ignatius Ajuru University of Education, Rumuolumeni, Port Harcourt

This work describes the bioaccumulation of heavy metals (Mn, Cr, Cu, Cd, Ni, Zn, Fe, As, and Pb) in seafood from the Kaani River in the Ogoni axis of Rivers State, Nigeria. The seafood examined were; shrimps, tilapia, mudskippers, and crabs. After a preliminary treatment and digestion with a combination of concentrated acids (HNO3, HCl, and H2SO4)...

Well water sources from selected communities in Ekpeyeland were assessed for the concentrations of polycyclic aromatic hydrocarbons (PAHs). The assessment was conducted seasonally in six communities. The concentrations of the PAHs were determined using standard methods and procedures and finally quantified by the use of GC-MS chromatography. The re...

The level of heavy metals in the Mini Whuo Stream in Port Harcourt, Rivers State, Nigeria was assessed. The heavy metals’ analysis was performed after due digestion by the use of a Thermo Atomic Elemental Absorption Spectrophotometer. The average concentrations of the heavy metals studied in the stream were Pb; 2.594±0.76 mg/L, Cu; 1.90±0.60 mg/L,...

Food is the most vital component of human existence. Maize and guinea corn purchased from open market in Port Harcourt, Rivers State, Nigeria were divided each into two group. One group was soaked in distilled water for four days and the other group remain unsoaked. After four days, they were both even dried to constant weight and digested using ni...

Heavy Metals Levels in soils used as a waste receptacle in Rukpokwu, Obio/Akpor, Port Harcourt, Rivers State, Nigeria were assessed. The heavy metals were determined using Atomic Absorption Spectroscopy methods. The mean levels of the heavy metals investigated in the soil of temporary dumpsites of Rukpokwu were; iron (Fe) 256.649±17.533mg/Kg, lead...

Water samples were collected from Mini Whou Stream and analyzed for gross organic pollutants and the results was used to evaluate the organic strength of the Stream. The gross organic pollutants studied were dissolved oxygen (DO), biochemical oxygen demand (BOD) and chemical oxygen demand (COD). Dissolved oxygen within the months studied ranged fro...

The contamination of water bodies has become a worldwide issue. Water samples collected from Ogbia axis of Kolo Creek at Imiringi, Emeyal and Otabagi were analyzed for heavy metals concentrations. The samples were analyzed with atomic absorption spectrophotometer (AAS). The results showed that lead varied from 0.729±0.10-1.034±0.11 mg/L, copper var...

Soil contamination as a result of human interferences with nature is a common occurrence all over the world. Soil samples were collected from three universities (Ignatius Ajuru University of Education (IAUE), University of Port Harcourt (UNIPORT) and the Rivers State University (RSU) in Port Harcourt, Rivers State. The soils were taken at the point...

Surface water samples were collected from three stations along the Ogbia axis of Kolo Creek and were evaluated for physical and chemical properties. The observed mean values from the analysis of the water samples were; electrical conductivity 38.05±5.01 µS/cm, turbidity 11.87±0.99 NTU, total dissolved solids 17.08±0.78 mg/L, total suspended solids...

The level of contamination of Orashi River by total petroleum hydrocarbons were investigated through the collection of surface water samples and sediment samples from four locations along the river. Determination of the level of contamination was done with the use of gas chromatography-flame ionization detector after following laid down clean-up pr...

Some physicochemical properties were assessed in soils within steel welding and fabrication workshops in Port Harcourt, Rivers State, Nigeria. The study was carried out between May to November, 2020. The physicochemical parameters were determined using standard conventional methods of analysis to ascertain the different levels of the selected physi...

Soil samples were collected at a depth of 0-30cm within two steel markets and a control site in Port Harcourt, Rivers State Nigeria to assess the level of heavy metals (Fe, Pb, Cu, Cd, Cr, Ni and As) in the environment. Atomic Adsorption Spectrophotometer was used to analyze the samples for heavy metals. The concentrations of all the heavy metals i...

Water samples were collected from Okamini stream and analyzed for some physicochemical parameters. The values showed that electrical conductivity, total dissolved solids, total suspended solids, chlorides, sulphates, nitrates and phosphates were within the range of values acceptable for domestic water use by WHO. Others such as turbidity, pH and sa...

This study evaluated the concentration and sources of poly aromatic hydrocarbons (PAHs) by means of Gas Chromatography/Flame Ionization detector (GC/FID) in asphalt contaminated soils from three Asphalt Companies namely AUC, H & H and JAFAC, within Port Harcourt Metropolis. The total concentration of PAHs across the three places showed that AUC Asp...

This present study evaluated the impact of asphalt mixing on the soil physical and chemical characteristics. Soil samples were collected from asphalt three asphalt production sites in Port Harcourt Metropolis. The mean values of the physicochemical parameters were thus: pH had 6.257±0.070, electrical conductivity was 113.2±5.385 mg/Kg, total organi...

Samples were collected from the water and sediment columns of the Orashi River from December 2019 to June 2020 at intervals of two months and then analyzed for the concentration of total petroleum hydrocarbons and the origin of the petroleum hydrocarbons pollution in the river. Laboratory pretreatment of samples, extraction procedures and gas chrom...

Soil and cassava (leaves and tubers) samples were collected from Gokana communities in Rivers State, Nigeria in the months of January and July, 2020. Following standard procedure, the samples were prepared and digested for heavy metals analysis. The analysis for heavy metals was done on the soils, leaves and tubers of cassava using atomic absorptio...

The role of hydrocarbons and its occurrence in the wetlands of the riverine environments of the Niger Delta States is very important for both individuals and cooperate bodies. Samples of water and sediments were collected between January to June from areas where drainages are let out into the New Calabar River. The Samples were examined for Total h...

Water samples were collected from four different stations bimonthly from the Orashi River for a period of one year. The samples were collected from the shores of selected communities along the Engenni axis of the river. The samples were treated and analyzed according to standard laboratory and analytical procedures for water physicochemical paramet...

The total petroleum hydrocarbons content of the surface water and the sediments from the Orashi River were investigated between December 2019 and June 2020 at two months intervals to find out the level of contamination of the river. The total petroleum hydrocarbons were determined by GC-FID using Agilent 5890N, after following due laboratory proced...

Water and sediment samples were collected from Onyima Creek (Ede Onyima) for eight months at intervals of two months to analyze the level of distribution and possible sources of total petroleum hydrocarbons contamination. Petroleum hydrocarbons components were determined by Gas Chromatography-Flame Ionization Detector (GC-FID) and then quantified a...

Heavy metals concentration were determined in soil, fruits and vegetable samples collected from cultivated farmlands in Mgbuodohia, Rumuolumeni. The samples were prepared, and analyzed for heavy metals using Atomic Absorption Spectrophotometer (AAS). The physico-chemical parameters such as pH, electrical conductivity, salinity, total organic carbon...

This research study was based on the comparative analysis of hydrocarbon content of soil samples from the 3-selected university campuses of Uniport, RSU and IAUE. Samples were collected from three different points to establish the composite samples within spaces of 500m apart as to obtain representative samples. The parameters for the determination...

Sediment samples were obtained from points where drainage of effluents were discharge into the New Calabar River. The samples were collected for a period of four months and analyzed for heavy metals using atomic absorption spectrophotometer (AAS). The heavy metals examined were iron (Fe), manganese (Mn), lead (Pb), cadmium (Cd), nickel (Ni), chromi...

Soil samples were collected from three asphalt hot mix stations and examined for heavy metals using standard procedures. The results obtained showed that the concentrations of the heavy metals occurred in the order; iron (Fe)>zinc (Zn)>chromium (Cr)>lead (Pb)>copper (Cu)>nickel (Ni)>arsenic (As)>cobalt (Co)> cadmium (Cd). All the metals examined in...

Polycyclic aromatic hydrocarbons (PAHs) are organic pollutants which are associated with carcinogens. Their presence in the environment has been linked to cancer. Assessment of polycyclic aromatic hydrocarbons in water of Nta-Wogba stream were studied, in which three (3) samples of water from the Nta-Wogba stream were sampled. The water samples wer...

This study was aimed at determining the variations of some heavy metals in soil sample between Mile 3 (M3) and Mile 4 (M4), all in Diobu, which are both primarily business and residential areas when compared to the control represented by the Rivers State University (RSU), Port Harcourt. The Azuka Index (Ai) was used to determine the Safety Factor I...

Wastewater samples were collected from an oil industry at the point of discharge for a period of two years, from January 2018-December 2019. The wastewater samples were analyzed for different physicochemical parameters such as temperature, turbidity, total dissolved solids (TDS), total suspended solids (TSS), conductivity, pH, alkalinity, salinity,...

Sediment samples were collected from surface of sediments from parts of the mangrove wetlands of the New Calabar River at points of effluents discharge. The samples were treated according to standard procedures and analyzed for the concentrations of polycyclic aromatic hydrocarbons (PAHs). The results showed the presence of ten PAHs at Iwofe Jetty...

Sediment samples were collected from three points along the New Calabar River where effluents were discharged from drainage. The samples were collected in the months of July, August and September, 2019. The sediments were prepared for heavy metals analysis using standard laboratory techniques. The filtrate obtained after digestion of the samples we...

Leachate contaminated soils from dumpsites were collected from different dumpsites within the Port Harcourt City settlement and were subjected to physicochemical analysis. The different physical and chemical parameters were analyzed using standard laboratory procedures. The mean values of the results obtained were: pH (5.753±0.12), conductivity (19...

Physicochemical parameters concentration reveals the physical and chemical states of a water body. Water samples were collected from Nta-Wogba stream in Port Harcourt metropolis and analyzed for physicochemical parameters. This was done in order to assess the portability of the stream water for use. Some physicochemical parameters such as pH, elect...

ARTICLE INFO ABSTRACT Soil samples were collected at random from the Estate and Works Departments of three universities in Port Harcourt, Rivers State, Nigeria, where heavy-duty diesel generators are mounted to provide electricity for the universities environments and assessed for total petroleum hydrocarbons contamination. Soxhlet extraction metho...

Samples of surface water were collected from Edagberi Creek from three different stations at intervals of two months for a one-year period. The samples were treated using standard methods and then analyzed for heavy metals concentrations using atomic absorption spectrophotometry (AAS). The metals analyzed were manganese (Mn), mercury (Hg), cadmium...

The levels of Total Petroleum Hydrocarbon (TPH) using Gas Chromatography Flame Ionization detector (GC/FID) in asphalt contaminated soils from three Asphalt Companies of AUC, H & H and JAFAC in Port Harcourt environment were examined. The total concentrations and standard deviation of TPH across the three studied areas showed that AUC Asphalt had 2...

Water samples were collected from Ede Onyima Creek following standard procedures and were analyzed for some physical and chemical parameters. The samples were collected from three stations bimonthly for a period of one year. The result obtained showed that the physical characteristics such as conductivity, Total dissolved solids (TDS), total suspen...

The incidence of river pollution is a common place all over the world. Polycyclic aromatic hydrocarbons (PAHs) presence in the environment is on the increase. Water samples collected from Elelenwo River were analyzed for PAHs concentrations. The analysis was achieved after extraction with dichloromethane and n-hexane in a soxhlet extractor. Thereaf...

An investigation to assess the impact of auto-mechanic activities on the groundwater in Mile 2 Diobu was conducted with the aim to ascertain the level of pollution as well as the portability of the groundwater for human consumption. A total of four boreholes were analyzed for their physicochemical properties (temperature, pH and electrical conducti...

In order to assess the status of heavy metal contamination in Orashi River, water samples were collected from Orashi River bimonthly at different stations. The samples were analyzed for the concentrations of manganese (Mn), mercury (Hg), cadmium (Cd), lead (Pb), copper (Cu), nickel (Ni), iron (Fe), chromium (Cr) and zinc (Zn) ions using atomic abso...

Water samples collected from three points along the Elelenwo River in the months of June July and August were analyzed for some physicochemical parameters. The results showed variations of the parameters in the sampled locations and months. conductivity, turbidity, chlorides, and sulphates were higher than the recommended limit for domestic water b...

Human intervention into the natural environment in order to better humanity has both negative Local Government Area of the Rivers State. The communities where the samples were collected were Yeghe, Bodo, B-Dere and K-Dere. The samples were subjected to laboratory treatment and and positive components. Soil samples were collected from selected farml...

Leaves and peels of pawpaw bought from open market within Port Harcourt metropolis were examined for metals and qualitative phytochemical compositions. The metals examined in the leaves and peels of the pawpaw were manganese (Mn), potassium (K), sodium (Na), zinc (Zn), magnesium (Mg), calcium (Ca), iron (Fe), arsenic (As), nickel (Ni), copper (Cu),...

Background and Objective: Waste generation and disposal is a common issue all over the world. The problems associated with its disposal on the immediate environment calls for intense concern by man. This is due to contamination and pollution problem associated with wastes. This study was carried out to determine the levels of physical parameters fr...

This study was based on the assessment of heavy metal content of drain water within the vicinity of cement factory and other associated activities. Heavy metal concentration analysis was done using the atomic absorption spectrophotometer as described in APHA 3111B and ASTM D3651. The present research work deals with the study of seven (7) heavy met...

Soil samples were collected from three dumpsites (Chakiricha, Psychiatric and Rumuokwuta) within Port Harcourt metropolis and examined for the concentrations of polycyclic aromatic hydrocarbons (PAHs). The study showed that there was heavy presence of PAHs in the dumpsites. The total concentrations of PAHs in the dumpsites were in the order; Rumuok...

This study was carried out to determine the levels of physical parameters from some selected dumpsites in Port Harcourt metropolis. The study of water bacteriology was to establish a trend with the other physicochemical parameters. Leachates from the 3-selected dumpsites were analyzed and compared with the seasons, controls and established standard...

Water samples were collected from Elelenwo River between the periods of three months (June-August year) and analyzed for heavy metal content. The concentrations of the metal observed within the period showed the order of concentration as; iron (Fe) > zinc (Zn) > silver (Ag) > chromium (Cr) > copper (Cu) > cobalt (Co) > lead (Pb) > cadmium (Cd) > ni...

Water and sediment samples were collected from Silver River to determine the levels of various physicochemical parameters in both sediment and water from the river. This research was conducted with the aim of determining the extent of deterioration of the river as a result of artisanal refining of crude oil. The result obtained showed that the mean...

Water and crab samples obtained from four different locations (Elibrada, Aluu, Choba and Iwofe) along the New Calabar River were examined for heavy metal content using atomic absorption spectrophotomer (AAS). The concentration of heavy metals in the water samples were in the order Ni > Cu > Fe > Pb > Cr > Cd > As > Zn. In the crab, the order was Fe...

The experiment was aimed at finding out the extent of pollution of heavy metals on the Southern Ijaw River in Bayelsa, Niger Delta Nigeria. From the findings the river was indeed polluted

This study was aimed at the determination of chemical and gross organic pollutants levels in leachates from some selected and government approved dumpsites in Port Harcourt metropolis. Leachates from the 3-selected dumpsites were analyzed and compared with the seasons, controls and established standards using descriptive statistical designs. Integr...

The effect of human activities on natural environment has led to alterations in the natural state of the environment, which has led to contamination or pollution at different levels. Sediment samples collected from Andoni River, Rivers State, Nigeria, were analyzed for heavy metal content. The result revealed that the concentrations of the heavy me...

Heterobranchus bidorsalis (mean total length 31.50 ± 2.32 cm SD; mean weight 241.25 ± 30.39 g SD) were exposed to graded levels solutions of cypermethrin concentrations (0.0005, 0.0075, 0.010, 0.125 and 0.0150 ppm) and a control for 23 days. Plasma collected from the fish was analyzed for enzymes; aspartate transferase (AST), alanine transferase (A...

Roots of Dacryodes edulis are used in traditional medicine as remedy to stomach ailment, parasitic skin diseases, dysentery and yellow fever. This study was aimed at isolation and characterization of pure compound that enhances the medicinal potency of the plant part by means of spectroscopic methods which include Thin Layer Chromatography, FT-IR,...

Water samples from effluents discharge points were analyzed for polycyclic aromatic hydrocarbons (PAHs) concentration using chromatographic techniques. The result obtained showed the presence of all the PAHs categories in the water samples. The total concentrations of PAHs in the different location showed that Minipiti station was the highest (44.9...

This study was undertaken to assess the physicochemical quality of the surface water of the Sagbama Creek, Bayelsa State, Nigeria. Samples of water were collected and preserved using trioxonitrate v acid and placed in a cooler of ice for transfer to the laboratory except for insitu measurements for temperature, turbidity, conductivity, TDS, pH, DO...

This study was carried out to assess the heavy metal and nutrient quality of the surface water of the Sagbama Creek, Bayelsa State, Nigeria. Samples of water were collected and preserved using trioxonitrate (v) and in cooler of ice and transfered to the laboratory. Five stations were employed correspondingly with control stations and results were c...

Dry and powdered leaves of Phyllantus fratenus and, Taraxacum officinale were subjected to different solvent extraction using chloroform, methanol and hexane. The extracts were examined for the phytochemical components present in them. It was observed that in Phyllantus fratenus; fats and oil, tannins, saponins, coumarins were present the chlorofor...

Sediments samples collected from three different discharged points (Iwofe Jetty, Minipiti and Police Post) were treated according to laboratory standards and examined for some physicochemical parameters. The sampling was done between the months of February to May. The parameters examined included pH, Conductivity, total organic carbon and total org...

Water samples collected from three effluents discharge points into the New Calabar River were analyzed for physicochemical parameters using standard methods. The physicochemical parameters analyzed were colour, odor, temperature, pH, conductivity, total dissolved solids (TDS), turbidity, total suspended solids (TSS), dissolved oxygen (DO), biochemi...

Samples from roadside dust collected from different stations in Forces Avenue, Old GRA, Port Harcourt, Rivers State, Nigeria were digested (mineralized) and subsequently analyzed for heavy metals concentration. The result of the investigation showed that Iron (Fe) was the most abundant metal detected in the roadside. The highest value of Fe was obt...

The New Calabar River is an important commercial river in Rivers State. Surface sediment samples were collected from four stations and analyzed for some heavy metals concentrations. The results obtained revealed that the concentrations of the metals were iron (Fe) > zinc (Zn) > nickel (Ni) > chromium (Cr) > copper (Cu) > lead (Pb) > cadmium (Cd) >...

This paper predicted the corrosion rates of three refinery boiler components namely: Baffle wall tubes, vapourizing tube bank and the superheater coils, using a mathematical model developed from the balance equation of the refinery boiler. The results obtained were then compared those already measured by Ultrasonic Thickness Scanning Technique (UTS...

Water samples were collected at three different effluents discharge points into the New Calabar River. The samples were digested using standard methods. The digests were subsequently examined for heavy metals concentrations using atomic absorption spectrophotometer (AAS). Heavy metals results in the samples showed Ni as the most concentrated metal...

Background and Objective: Agricultural products and herbs are the source of food and medicine for many people all over the world. One major aspect of agricultural products is the problem of waste after the desired part has been utilized. These parts though considered as waste can serve useful purposes or as resources if effectively tapped. This stu...

The effects of leachate on heavy metals content of dumpsite soils were assessed using atomic absorption spectrophotometer (AAS). The results obtained showed that Iron (Fe) was the most abundant metal, with the highest concentration observed at the Rumuigbo dumpsite. The least concentrated metal in the dumpsites was vanadium (V) with the lowest valu...

The effects of leachate on heavy metals content of dumpsite soils were assessed using atomic absorption spectrophotometer (AAS). The results obtained showed that Iron (Fe) was the most abundant metal, with the highest concentration observed at the Rumuigbo dumpsite. The least concentrated metal in the dumpsites was vanadium (V) with the lowest valu...

Treatment of aquaculture fishes with plant extracts to control disease, boost production and fishing is a general phenomenon. This study investigated the effect of different doses of Lepidagathis alopecuroides on enzyme activities of Clarias gariepinus after fourteen days. On the fourteenth day, the fish were killed and tissues excised from them. T...

Wastewater effluent is produced in different industries and these wastes constitute environmental problems because of pollution tendencies. Wastewater effluents from an oil industry were collected for 24 months (January 2014-December 2015). The effluents were analyzed with atomic absorption spectrophotometer for cadmium (Cd), zinc (Zn), iron (Fe) a...

Wastewater effluent is produced in different industries and these wastes constitute environmental problems because of pollution tendencies. Wastewater effluents from an oil industry were collected for 24 months (January 2014 – December 2015). The effluents were analyzed with atomic absorption spectrophotometer for cadmium (Cd), zinc (Zn), iron (Fe)...

The protective property of Icacina trichantha against attack was examined using different solvents (water, methanol and petroleum spirit) and extraction methods (hot and cold). The extracts were prepared in different concentrations (0.025, 0.035, 0.045 and 0.055 mg/L) and a control (0.00 mg/L) and applied on the wood (Bombax buonopozense). The trea...

The effect of aqueous extract of Lepidagathis alopecuroides leaves (0.25, 0.50, 0.75, 1.00 and 1.25 mg/L) and a control (0.00 mg/L) was examined on the hybrid African catfish, Heterobranchus longifilus x Clarias gariepinus (mean total length, 29.96 ±2.23cm SD; mean weight, 207.83 ± 12.63g SD) under laboratory conditions to determine its effect on i...

The seed and peel of Citrullus lanatus (watermelon), a very commonly consumed fruit were examined for metals and phytochemicals. The metals were examined with atomic absorption spectrophotometer while the phytochemicals were determined through standard methods of phytochemical analysis after extraction of the Citrullus lanatus with ethyl acetate an...

The effect of cynoff on the kidney was assessed by subjecting twenty-four (24) Heterobranchus bidorsalis of mean total length 32.55 ± 2.32 cm and mean weight 243.76 ±45.12 g to different cynoff concentrations. The prepared concentrations were 0.005, 0.0025, 0.010, 0.0125 and 0.0150 mg/L and a control (0.00 mg/L). The electrolytes and enzymes were a...

The influence of diffuse or nonpoint sources of pollution on some physicochemical characteristics at the point of impact (POI) of a receiving waterbody in the Niger Delta, Nigeria, was assessed with samples of effluent wastewater and its sediment from the discharge channel of an oil industry on one hand, water and sediment of the receiving water at...

Concentrations of six heavy metals Pb, Cd, Zn, Mn, Cu, and Mg were investigated in dumpsites and non-dumpsites in parts of Rivers State. Similar sizes of two species of fruits mango (Mangifera indica) and pawpaw (Carica papaya) grown at these sites were used for the study. The levels of heavy metals were also investigated in the topsoil at each sit...

Pollution arising from anthropogenic activities is a common phenomenon. Soil samples collected from three abattoirs in Port Harcourt (Agip, Iwofe, and Mile III) between the months of January to July. The samples were analyzed for physicochemical parameters after following laboratory procedures, using the appropriate probes. It was observed that the...

Two Rivers: Bomu in Ogoniland and Oginigba in Port Harcourt all in Rivers State, Nigeria were strategically chosen to represent rivers in Rivers State that are prone to ecological degradation due to industrial activities. Their contamination status was assessed using trace metals in water, sediment and Callinectes gladiator (swimming crab). Water,...

Cold and hot extracts of Lepidagathis alopecuroides were obtained using water, petroleum spirit and methanol as extracting solvents. The extracts were diluted to different concentrations (0.025, 0.035, 0.045 and 0.055 mg/L) and a control (0.00 mg/L). The extracts were then applied on completely dried pieces of Bombax buonopozense wood and stuck in...

Sediments collected from Bomu and Oginigba Rivers were treated according to recommended standards and subsequently analyzed for heavy metals and further tested with index models. The results showed that all the metals examined were higher than the recommended upper limits in sediments by China and USEPA except lead in the Oginigba River and cadmium...

Water samples collected from boreholes close to a dumpsite in Rumuolumeni, Port Harcourt in the months of January, April, August and November were analyzed for physicochemical properties and heavy metals using APHA standard methods. The data obtained did not reveal any significant changes between the months and the seasons. Temperature values were...