Doris Fovwe Ogeleka

• PhD
• Professor at Federal University of Petroleum Resource Effurun

Every human deserves the right to consume safe water as it is the basic necessity for their existence and sustenance. The study was aimed with the view of ascertaining the effectiveness of carbon and gravel-based biosand filters in treating rural waters and evaluating the risk of consumption using the water consumption risk assessment matrix (W-CRA...

The release of toxic gases and spills into the ecosystem prior to anthropogenic activities can increase the level of pollutants in hydrological systems. This possibly influences the number of harmful substances that percolate into aquifers. The drilling of polluted aquifers for domestic and drinking purposes and consuming such water untreated conse...

The suitability of local barite samples were appraised as weighting agents in drilling mud using some physic-chemical parameters. The parameters (p H , specific gravity, moisture content, Mohr's hardness, sulphate and metallic contents of thirty local barite samples(grouped into three, A 1 , A 2 & A 3) sourced from Obi local government area of Nass...

Introduction: Safe drinking water is vital to all human and living organisms. Aim and Study Location: This study appraised untreated water within the Federal University of Petroleum Resources, Effurun (FUPRE) campus with a view to ascertaining their potability. Methodology: The samples were analyzed using the America Public Health Association (APHA...

The incorporation of nanoparticles into cellulose materials to form nanocomposite is an interesting way of improving the functions and applications of cellulose. The properties associated with the nanoparticles contribute immensely to the overall behavior of the nanocomposites, which determine their applications. Cellulose-Ag-ZnO nanocomposites has...

A new complex, Mn3 (C7 H4 O2 )2 (C12H8 N2 )(CH3 OH)2 (H2 O)4 , has been synthesized under slow solvent evaporation method. The compound was characterized by photoluminescence and single crystal X-ray diffraction techniques. The compound gives triclinic structure with a space group P-1(No. 2). The observed unit cell dimensions are a = 7.4369(3)Ǻ, b=...

Globally, with the application of over 4 billion tons of herbicides yearly to suppress or kill weeds, the uncontrollable / unregulated use and disposal of these sometimes-recalcitrant chemicals could result in deleterious effects on non-target ecological receptors. This evaluation recorded varying degree of toxic effects on the environmental recept...

In this appraisal, heavy metal concentrations in soils from Zamfara State were enumerated approximately a decade after the lead poisoning saga using indexes of pollution. The area is enhancement with valuable ores and minerals including gold making mining the most lucrative business in the area. The soils were moderate to slightly basic with a pH r...

Introduction: The constant impact on the environment occasioned by pollution, indiscriminate application of agricultural chemicals, security challenges and crisis in the Niger Delta ecological area of Nigeria has caused severe damage to plants, soil organisms and humans. Aim and Methodology: In this research, onions (Allium cepa L) was exposed to v...

The phyto-toxicological effects of a selective herbicide Atraforce® on onions (Allium cepa L) was assessed using the standard protocol of the Organization for Economic Co-operation and Development (OECD) # 208. The mean specific % growth rate relative to the control recorded was 77 ± 1.0, 70 ± 0.0, 60 ± 0.5, 47 ± 0.5 and 21 ± 0.44% with respect to...

Petroleum crude oil refining to generate useful products releases noxious gases such as sulphur (IV) oxide, nitrogen (IV) oxide and carbon (IV) oxide, which dissolve in rainwater to form acid rain. This research was to ascertain the impact of the refining process on the rainwater quality in a peri-urban area where residents depend on precipitation...

Periwinkle snails Tympanotonus fuscatus var radula, an important shellfish in the Niger Delta ecological zone are on the decline and they have not been considered in environmental risk assess-ment due to the lack of standardized protocols. The gastropod is an abundant species and widely distributed in the aquatic Niger Delta environments. In this s...

The ecological effects of oil spill in the environment were studied in Warri riverine areas of Ubeji and Jeddo, Delta State, where an oil spill occurred and cleanup or remediation was not carried out for over a year prior to this evaluation. The American Public Health Association (APHA) and the American Society for Testing and Materials (ASTM) meth...

The application of herbicides in agricultural practices may pose certain toxic effects on non-target species including molluscs (snails), earthworms and other soil-dwelling organisms, which would in turn put the lives of humans at great risk. This study considered the lethal and sublethal effects of Grassate®, a non-selective glyphosate-based herbi...

Petroleum-based refined products such as diesel, kerosene, petrol are the major source of energy for industry and daily life. Accidental spills and leakages occur regularly during the refining, transport, and storage of petroleum products. Bioremediation of diesel contaminated water was studied using indigenous degrading bacteria isolated from hydr...

Ecotoxicological effects of industrial chemicals (Rig wash, Oil eater, Nalco, Glycol™) and pesticides (Propoxur, Deltamethrin, Atrazine, Furadan) on Tilapia guineensis (fish) and Aporrectodea longa (earthworms) were tested using the Organisation for Economic Cooperation and Development (OECD) # 203 and 207 protocols. The water and soil ratings indi...

There has been a great limitation to the use of incinerator bottom ash (IBA) residue in the construction and manufacturing industries due to the high contents of heavy metals, which poses great threat to the environment and human health. This study was carried out to evaluate the efficiency of heavy metals (Fe, Zn, Cd and Pb) removal from domestic...

This study examined the phyto-toxic effects of a commonly named non-selective herbicide glyphosate (Roundup™) on onions ( Allium cepa Linn. ). The study was necessitated due to the indiscriminate use and release of Roundup™ for weed control in the Niger Delta soils of Nigeria. The Organisation for Economic Co-operation and Development (OECD) standa...

The suitability of local barite as weighting agent in drilling mud was appraised using some physico-chemical parameters. Thirty samples, A, sourced from Obi in Nasarawa State, Nigeria; and 10 imported samples, N, in use in drilling mud, were analysed. The mean pH of the local samples ranged from 5.13 ± 0.12-6.25 ± 0.05; the specific gravity, 3.95 ±...

Ecotoxicological effects of industrial detergent (Neatex) and corrosion inhibitor (Norust CR 486) commonly released into the Nigerian environment were studied using laboratory toxicity test. These industrial chemicals are used copiously in the environment as if they do not have any ecotoxicological effects. Fish, shrimp and earthworms were exposed...

The toxic stress of drilling mud (drilling wastes) from operations in an oil drilling industry in the Niger Delta area of Nigeria was assessed using standard laboratory toxicity test. The experimental shrimp used was Palaemonetes africanus obtained from a brackish water environment. The concentrations of the drilling wastes used for the definitive...

Short-term effects of industrial chemicals (Rigwash, Oil eaters, Nalco, Glycol™) commonly released into the Nigerian environment were studied using laboratory toxicity test. Fish and earthworms were exposed to varying concentrations of the test chemicals using the Organization for Economic Cooperation and Development (OECD) # 203 and 207 protocols...

Burrow pit effluent collected from a waste dump site in the Niger Delta area of Nigeria was subjected to sublethal test using periwinkle (Tympanotonus fuscatus linne). This was to ascertain if the heavy metals and organic constituents in the burrow pit effluent bioaccumulated in the tissues of the organisms. The test was conducted using the Organiz...

The toxic stress of a commonly used dispersant (Caamol lubri-clean) on fresh water shrimp; Desmoscaris trispinosa and brackish water shrimp; Palaemonetes africanus was tested employing the Organization for Economic Cooperation and Development (OECD) # 218 bioassay laboratory protocol. The mean % mortality obtained for the 10-day experimental durati...

The lethal effects resulting from incessant release of toxic surfactant-containing industrial chemicals into the Niger Delta Ecological Zone of Nigeria was studied using a laboratory toxicity test. The study employed the Organisation for Economic Development and Cooperation (OECD) 203 protocol. The test organism (Tilapia guineensis [fish]) was obta...

Tilapia guineensis commonly found in the Niger Delta ecological zone of Nigeria was exposed to sublethal concentrations (1.56, 3.13 mg/l) of neatex (industrial detergent) and norust CR 486 (corrosion inhibitor) using the Organisation for Economic Cooperation and Development (OECD) # 203 protocol. At test termination on the 28th day, the rate of bio...

We used fresh and brackish water shrimp (Desmoscaris trispinosa and Palaemonetes africanus), in sediment bioassays to assess the toxicity of an industrial detergent containing high levels of anionic surfactant (linear alkylbenzene sulphonate (LAS)). The Organization for Economic Cooperation and Development (OECD), # 218 direct sediment toxicity ass...

Ecological effects of indiscriminate disposal of industrial chemicals into soils of the Niger Delta environment of Nigeria were assessed using earthworms in spiked natural soil in the laboratory. Populations of indigenous epigeic adult earthworms, Aporrectodea longa , were exposed to varying concentrations of two chemicals (industrial detergent and...

The toxic effects of industrial chemicals on three early life stages of an economically important fish, Tilapia guineensis were investigated using the Organisation for Economic Cooperation and Development (OECD) # 203 recommended semi-static renewal bioassay. The assessment was necessary for the uncontrollable disposal of Neatex (liquid detergent)...

The assessment of water and sediment quality from chemical pollutants in the Nigerian Niger Delta were conducted using bioindicators (Desmoscaris tripsinosa and Palaemonetes africanus). The Organization for Economic Cooperation and Development (OECD) (2004), No.218 direct sediment toxicity assessment was employed. Shrimp were exposed to sediments t...

The common cichlid (Tilapia guineensis) of the Niger Delta was exposed to lethal (6.25, 12.5, 25.0, 50.0, and 100 mg l−1) and sublethal (1.56 and 3.13 mg l−1) concentrations of Neatex and Norust CR 486 for four and twenty eight days, respectively. The rate of mortality, level of glycogen reserves in the muscle tissues, and bioaccumulation of surfac...

The biological effects of uncontrolled discharge of industrial chemicals into the Niger Delta environment of Nigeria need to be investigated, and the acute toxicity assay represents a useful tool. This study investigated the toxicity of two chemicals (Neatex and Norust CR 486) to early life stages of an economically important fish (Tilapia guinensi...

Ecological effects of indiscriminate disposal of industrial chemicals into soils of the Niger Delta environment of Nigeria were assessed using earthworms in spiked natural soil in the laboratory. Populations of indigenous epigeic adult earthworms, Aporrectodea longa, were exposed to varying concentrations of two chemicals (industrial detergent and...