Biological And Chemical Changes Associated With Exposure Of Cyprinid Fishes To Some Oil Field Chemicals In The Niger-Benue River System, Nigeria

Uche, Arinze; Sikoki, F.D.; Konya, R.S.

doi:10.2118/178309-ms

Cited by 5 publications

(5 citation statements)

References 14 publications

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“…The percentage concentration of 0.031% and 0.016% achieved 100% mortality within 4 hours of the test period. The corrosion inhibitor showed significant lethal effects on freshwater Tilapia guineensis, this collaborates previous research that corrosion inhibitors are toxic to fish and other aquatic organisms [21,22].…”

Section: Resultssupporting

confidence: 89%

“…They further stated that among the production chemicals used for oil and gas production, corrosion inhibitor and biocide are the most toxic. Uche et al [17] in their work on the biological and chemical changes associated with the exposure of Cyprinid fishes to oilfield chemicals concluded that production chemicals have individual and synergetic toxic effects on the fish.…”

Section: Neff Et Al Stated That the Concentration Of Production Chemi...mentioning

confidence: 99%

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Evaluation of Selected Chemicals used for Oil and Gas Production and Their Toxic Effects on the Niger Delta Fresh Water Tilapia Guineensis

Kingsley

Friday

Abraham

2021

JALSI

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There are projections of continuous increase in the world’s energy demand, which might result to increase in oil and gas exploration and production activities. Nigeria for instance, runs a mono-economy that largely depends on the revenues from her rich oil and gas deposits. Oil and gas exploration and production activities are expected to increase over the years in Nigeria to meet her economic needs, as well as the global energy need. However, oil and gas production activities are associated with environmental concerns, especially with respect to management of the kind of wastes it generates. A major waste generated during oil and gas completion and production operations is the Produced Water (composed of water, different production chemicals and other constituents). This study is focused on evaluation of the toxic effects of selected production chemicals on the Niger Delta freshwater Tilapia guineensis. Among the chemicals evaluated include: SPECTRUS NX1173 (Biocide), FLOGARD MS 6208 (Corrosion inhibitor), ELIMINOX (Oxygen scavenger) and EC9017A (anti-foam), while Tilapia guineensis was used as the bioindicator. Whereas there are past researches on the individual chemicals and confirmation that they are toxic in nature, there are no adequate researches on the comparative toxicity effects of these chemicals, especially on the Niger Delta environment. Produced water samples were simulated in the laboratory using the production chemicals (at different concentrations) and 2000ml of freshwater sample for each experimental setup. The fishes were acclimatized for ten days using same freshwater sample, those that survived were selected for the experiment. The mortality and survival rate of the test organism was monitored at a constant interval of one (1) hour for Ninety-six (96) hours and the percentage mortality of the test organism recorded for all the chemicals at different concentrations ranged from 100% to 10%. The lethal concentration (LC50) calculated for each of the chemicals are as follows: Corrosion inhibitor 0.002%, biocide 0.003%, oxygen scavenger 0.01% and defoamer 0.176%. The corrosion inhibitor was the most toxic as there was 100% mortality of the Tilapia guineensis within 24 hours of the test period, while the defoamer was the least toxic as there were more survival of the test organism at the end of the test period. The test results indicated that all the production chemicals used in this research were toxic, their lethal concentrations differed from one chemical to the other, and the corrosion inhibitor and biocide had the highest toxicity effect on the organisms. The research findings could be used as a basis by the Nigerian regulatory agencies for possible review of currently approved completion and production chemicals for oil and gas activities, as well as produced water disposal options, especially discharge in water bodies in the Niger Delta.

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Section: Resultssupporting

confidence: 89%

Section: Neff Et Al Stated That the Concentration Of Production Chemi...mentioning

confidence: 99%

Evaluation of Selected Chemicals used for Oil and Gas Production and Their Toxic Effects on the Niger Delta Fresh Water Tilapia Guineensis

Kingsley

Friday

Abraham

2021

JALSI

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“…River Nun is a bifurcation of the River Niger down in the Niger Delta. It has an aggregate length of 195 km with a mean width of 370 m. It flows via several communities in the state, through sparingly settled areas of freshwater, mangrove swamps and coastal sand ridges before completing its 160 km course to the Gulf of Guinea [16]. The river is used for several purposes comprising domestic, fishing and recreational, as well as ecological assets.…”

Section: Study Areamentioning

confidence: 99%

Investigation of the spatial variation of sediments heavy metals along the Nun River using kriging interpolation technique

2021

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This study employs geospatial statistical technique to assess the spatial distribution of heavy metals along the Nun River. Core sediment samples were collected from relatively undisturbed areas (twenty-five different stations) using Uwitec Triple sediment cutter. The rectangular coordinates of the sediment sample location were determined with the aid of Germin handheld GPS receiver. The concentrations of cadmium, lead chromium and zinc present in the sediments was determined with the aid of an atomic absorption spectrophotometer. For geospatial analysis, five semi-variogram models (stable, circular, spherical, exponential and K-Bessel) were fitted for each of the four critical parameters (heavy metals). In addition, four goodness-of-fit statistics (mean square error, root mean square error, root mean square standardized error and average standard error) were utilized to decide the most suitable model used to develop the final prediction map for each parameter. From the results obtained, it was observed that; regions with red color codes signify higher concentrations of cadmium, lead, chromium and zinc. Further assessment of the results showed that Otuan, Obeleli, Angiama, Odobio, Kasama, Akedda and Akele experienced high concentration of cadmium while Tombia, Ewoi, Abilabio, Agudama and Yenikpa experienced high concentration of lead.

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“…It has a total length of 195km and an average width of 370m, the Nun River is considered the largest river in Bayelsa State (Seiyahboh et al, 2013). It flows through several communities in Bayelsa State, through sparsely settled zones of freshwater and mangrove swamps and coastal sand ridges before completing its 160km course to the Gulf of Guinea (inlet of the Atlantic Ocean) (Uche et al, 2015). The river is used for domestic purposes, recreational, fishing and ecological assets.…”

Section: Description Of Study Areamentioning

confidence: 99%

Soil Loss Estimation within the Nun River Basin using Revised Universal Soil Loss Equation (RUSLE) integrated in Geographic Information Systems (GIS)

Ehiorobo¹,

Ilaboya

Onwo

2021

Eur. j., eng. sci., tech.

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River bank erosion can cause undesired river bank expansion, distortion of the river course thereby slowing the river velocity and hindering the water carrying capacity of the river. Slow velocity of the river course can result in fast sediment accretion and accumulation at the bottom of the river. If these trends are not checked, the river may wind down and at best begin to become a delta at its middle course. The focus of this study is to apply GIS and analytical RUSLE equation to estimate soil loss within the Nun Basin. Core sediment samples were collected from relatively undisturbed areas (nine different stations) using Uwitec Triple sediment cutter. The sediment samples were processed in the lab for sediment particle size analysis (PSA) and Pb-210 atmospheric deposition with age using alpha spectrophotometer. Spatial rainfall data of the study location were employed to generate the rainfall erosivity map in order to determine the erosivity factor (R). Particle size distribution analysis was validated using Scanning Electron Micrograph (SEM) and integrated with Geographic Information Systems (GIS) was employed to create the soil erodibility map which was subsequently used to determine the erodibility factor (K). The cover management factor (P) was determined using the land use land cover map and the resulting data were then employed to model the river bank erosion around the study area. Result of the study revealed that the maximum annual average soil loss rate was estimated to be 0.66 tons/ha. /year around the Nun River based on GIS application using the Revised Universal Soil Loss Equation (RUSLE).

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Biological And Chemical Changes Associated With Exposure Of Cyprinid Fishes To Some Oil Field Chemicals In The Niger-Benue River System, Nigeria

Cited by 5 publications

References 14 publications

Evaluation of Selected Chemicals used for Oil and Gas Production and Their Toxic Effects on the Niger Delta Fresh Water Tilapia Guineensis

Evaluation of Selected Chemicals used for Oil and Gas Production and Their Toxic Effects on the Niger Delta Fresh Water Tilapia Guineensis

Investigation of the spatial variation of sediments heavy metals along the Nun River using kriging interpolation technique

Soil Loss Estimation within the Nun River Basin using Revised Universal Soil Loss Equation (RUSLE) integrated in Geographic Information Systems (GIS)

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