Petrographic and mineralogical study of extended outcrops of lignite layers in Agbor area, southern Nigeria

Ogala, Jude E.; Kalaitzidis, Stavros; Rizos, Apollon-Marios; Christanis, Kimon; Omo-Irabor, Omoleomo Olutoyin; Adaikpoh, Edwin O.; Ejeh, Omabehere Innocent; Papaefthymiou, H.

doi:10.1016/j.jafrearsci.2019.103659

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…The gently sloping land surface is prone to waterlogging, and mangrove and freshwater swamp forests cover about half of the Delta’s terrestrial surface (NDES 1997). The presence of low-rank coals buried in the Delta sediments (Tuttle, Charpentier, and Brownfield 1999; Ogala et al 2020) suggests that peat formation occurred intermittently during the Cenozoic.…”

Section: Exposurementioning

confidence: 99%

The vulnerability of tropical peatlands to oil and gas exploration and extraction

Lawson

Coronado

Andueza

et al. 2022

Progress in Environmental Geography

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Tropical peatlands store globally significant quantities of carbon and are ecologically and culturally important, but little is known about their vulnerability to oil and gas exploration and extraction. Here, we analyse the exposure of tropical peatlands to the activities of the petroleum industry and review what is known about the sensitivity of peatlands to these activities. We find that 8.3% (107,000 km2) of the total area of tropical peatlands overlaps with a 30-km buffer area around oil and gas infrastructure. Major areas of overlap include the Sumatra Basin (Indonesia), the Niger Delta (Nigeria) and the Putumayo-Oriente-Marañón Basin (Peru/Ecuador/Colombia). Documented environmental impacts include deforestation and habitat loss associated with the exploration and development of oil fields, and contamination from spills of oil and produced water (well brine). Peatlands, and the ecosystem services they provide, are sensitive to these impacts due to unique aspects of their ecology and hydrology, the easy spread of contamination by flowing water, the long-term storage of contaminants in peat, and the slow degradation of oil under anoxic, waterlogged conditions. Given the potential negative consequences for human health, resource security, biodiversity, and carbon storage, we propose a research agenda to provide an improved evidence base to support effective governance.

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Section: Exposurementioning

confidence: 99%

The vulnerability of tropical peatlands to oil and gas exploration and extraction

Lawson

Coronado

Andueza

et al. 2022

Progress in Environmental Geography

View full text Add to dashboard Cite

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Hydrogeochemical Characterization and Water Quality Assessment of Surface Water Resources in Obomkpa, Western Niger Delta, Nigeria

Ekeoma,

Omoleomo

2024

Preprint

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The hydrogeochemical analysis of surface water resources in Obomkpa and its surrounding areas aimed to characterize their physical, chemical, and microbial properties. This study provides crucial information on the quality and suitability of the water for various uses, focusing on acidity, mineral content, and suitability for irrigation and domestic purposes. Six water samples were collected from rivers in the study area and analyzed using standard methods. The parameters assessed included pH, total dissolved solids (TDS), total hardness, electrical conductivity (EC), dissolved oxygen (DO), biochemical oxygen demand (BOD), total suspended solids (TSS), turbidity, salinity, and concentrations of various ions, heavy metals, and microbial properties. The chemical analysis revealed that the water resources are generally acidic, with an average pH of 5.89. They are fresh (TDS mean of 28.62 mg/l) and soft (total hardness mean of 16.83 mg/l), but the acidity renders them unsuitable for industrial purposes. Other parameters such as EC (mean 46.82 µs/cm), DO (mean 4.98 mg/l), BOD (mean 1.21 mg/l), TSS (mean 5.17 mg/l), turbidity (mean 4.1 NTU), and salinity (mean 14.88 mg/l) were within acceptable ranges for various uses. Anion analysis (sulphate, nitrate, bicarbonate, chloride) and cation analysis (calcium, magnesium, sodium, potassium) showed varying concentrations, with sulphate (mean 5.11 mg/l), bicarbonate (mean 27.74 mg/l), and chloride (mean 8.27 mg/l) being notable. Heavy metal analysis revealed concentrations of iron, copper, and zinc (means of 0.016 mg/l, 0.011 mg/l, and 0.204 mg/l respectively), with zinc exceeding acceptable limits. Correlation analysis showed relationships among physiochemical parameters, with correlation coefficients ranging from − 0.24 to 0.99. Similar correlations among heavy metals, cations, and anions were observed (correlation coefficient (r²) range of -0.21 to 0.70 and 0.12 to 0.98 respectively). The study concludes that while surface water resources in Obomkpa are generally suitable for domestic and irrigation purposes, they require treatment to reduce acidity and control zinc levels. The water chemistry analysis identified the dominant water types as Ca-Mg-(Na)-Cl and Ca-Mg-(Na)-SO4, indicative of hard water with high calcium and magnesium content. This study contributes novel insights into the hydrogeochemical characteristics of Obomkpa's water resources, emphasizing the need for targeted remediation to enhance water quality for various applications.

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Petrographic and mineralogical study of extended outcrops of lignite layers in Agbor area, southern Nigeria

Cited by 2 publications

References 23 publications

The vulnerability of tropical peatlands to oil and gas exploration and extraction

The vulnerability of tropical peatlands to oil and gas exploration and extraction

Hydrogeochemical Characterization and Water Quality Assessment of Surface Water Resources in Obomkpa, Western Niger Delta, Nigeria

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