The Isiokpo Oil-Pipeline Leakage: Total Organic Carbon/Organic Matter Contents of Affected Soils

Osuji, Leo C.; Adesiyan, S. O.

doi:10.1002/cbdv.200590077

Cited by 45 publications

(27 citation statements)

References 2 publications

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“…The pH at the end of sixty day of remediation was lower when compared with the values after fifteen days of remediation as shown on table 1 and 2. The observation is comparable with earlier reports [36,40,41,42]. Changes in pH level due to crude oil contamination could alter the soil fertility as well as other physiochemical properties which may as well influence the solubility and availability of soil nutrients [43,44].…”

Section: Resultssupporting

confidence: 91%

Remediation of Mild Crude Oil Polluted Fresh Water Wet Land with Organic and Inorganic Fertilizer

Chizoruo

Onyekachi

Chinaka

et al. 2016

ILNS

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ABSTRACT. Wetland pollution due to inputs from crude oil is one of the most prevalent environmental problems facing the aquatic ecosystem in the world. The present study was intended to investigate the effectiveness of combination of cow lumen and NPK fertilizer in stimulating the degradation of crude oil polluted fresh water wet land. Soil samples were collected from unpolluted plots, crude oil polluted plots and crude oil polluted plots that were treated with the remediating agents. After fifteen days and sixty days of remediation, the soil samples were analysed for pH, electrical conductivity (E.C), phosphate, PO 3-4 , phosphorous, P, % organic carbon, % total nitrogen N, carbon/nitrogen ratio and total petroleum hydrocarbon, TPH. The result indicates that combination of the inorganic and organic manure was more efficient in stimulating the degradation of the crude oil than the use of either the cow lumen or NPK fertilizer alone. The physiochemical properties of the soil in all the treated plots were observed to have been improved when compared with that of the untreated plots.

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Section: Resultssupporting

confidence: 91%

Remediation of Mild Crude Oil Polluted Fresh Water Wet Land with Organic and Inorganic Fertilizer

Chizoruo

Onyekachi

Chinaka

et al. 2016

ILNS

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“…This agrees with the report of Amadi et al [15] who observed increase in soil acidity following increases in concentration of crude oil. The observed pH decreases recorded in our study compared favourably with pH values (4.7 to 5.4) reported by Osuji and Adesiyan [16] and Agele et al [17]. The decreases in soil pH observed in this study contradicts the reports of Onuh et al [18,19] who obtained increases in soil pH as the level of crude oil applied increased.…”

Section: Discussionsupporting

confidence: 59%

Dynamics of Chemical and Biological Properties of Organically Amended Petroleum Hydrocarbon Polluted Soil as Affected by Incubation Periods

Aj¹,

Bamiduro²

2017

J Bioremediat Biodegrad

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A study was conducted in the Screen house of the Department of Crop, Soil and Pest Management, FUTA Akure to examine the time dynamic trends in soil chemical properties as affected by contamination with petroleum hydrocarbon compounds (PHC) in a 6 months incubation period as affected by organic amendments. The petroleum hydrocarbon compounds used were spent engine oil (SEO), bitumen (BIT) and crude oil (CRO). The organic amendments used were poultry manure and mycorrhizal fungi (Glomus mossae) spores. The respective petroleum hydrocarbon compounds (spent engine oil SEO, bitumen BIT and crude oil CRO) were applied at 2 rates of 0 and 455 ml per pot and 3 levels of organic amendments followed by incubation for six (6) months. Soil samples were collected from each treatment at 0, 2, 4 and 6 months after treatment application for the determination of some chemical properties (pH, organic carbon, N, P, K, Ca and Mg). The time changes in elemental concentrations of soil contamination with petroleum hydrocarbon compounds (SEO, BIT and CRO) showed declining trends in the values of pH, organic carbon and Mg while N-Total, Ca and available P and K rose with time. In general, the nature of the trends (polynomial function as best fit) indicated that the observed responses were not uni-function of a factor but suggest interaction among factors responsible for the breakdown of petroleum hydrocarbon compounds and hence its toxicity to soil chemical properties. The time course of changes in soil chemical properties as affected by petroleum hydrocarbon compounds (PHCs) contamination in soil differed among the PHCs evaluated. The values of the measured soil parameters recorded at the commencement of the experiment and at 2, 4, 6 months after the application of the petroleum hydrocarbon compounds showed declining trends in the values of pH, organic carbon and Mg were obtained. Increasing trends in N-total and available P with time up till the end of the experiment while SEO recording the highest values at 6 months of incubation. Trends of the mean values (highest and lowest values) with respect to treatment showed that CRO had the highest soil pH at 2 and SEO had the lowest at 6 month. SOC increased across treatments with SEO recording the highest value at 2 months of incubation, which was followed by general decline in values with time across the PHCs. The results indicated that PHCs adversely affect soil chemical properties and that addition of organic substances improved chemical properties of the soil following pollution with petroleum hydrocarbon compounds compared with the un-amended soils. Poultry manure in particular performed better compared with mycorrhizal inoculum with respect to improvement of soil chemical properties.

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“…Quantification of the soil, sludge and water surrounding the refinery in this study is an important physical factor in the determination of the toxicity levels which would otherwise contaminate the food chain by way of useful microorganisms, plants and marine organisms. The pH of the environment is important as different vegetable and microbial life forms blossom at varying pH levels, usually tending to neutral [28]. It was, therefore, very important to determine soil pH in this study.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the pH level is a good indicator of the polluting elements end-point, leachability and decomposition which in effect affects the physical, chemical and biological properties of the environment [28]. The lower moisture content observed in the soil samples compared to that of the sludge is attributed to the presence of total petroleum and polycyclic aromatic hydrocarbons, which a study has reported causes an increase in soil hydrophobicity which would lead to a reduced moisture holding capacity [30].…”

Section: Resultsmentioning

confidence: 99%

Characterization of Environmental Samples around an Indigenous Refinery in Nigeria

Uwem¹

2017

BMB

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Co-contamination by petrochemicals and heavy metals emanating from refinery operations was investigated from sludge, soil and water samples immediately around WRPC refinery, Delta State, Nigeria. Collection and assessment of environmental samples from 5 different points across the refinery and groundwater for which the pH, Electrical Conductivity, Temperature, Turbidity, TDS, TSS, Total hardness, Alkalinity, DO, BOD, Cl¯, PO 4 3¯ and bacteriological analysis were measured. The total petroleum hydrocarbon and polycyclic aromatic hydrocarbon concentrations were 755.291 and 22.746 mg L -1 in the water samples, 8756.148 and 311.569 mg kg -1 for the soil samples, 65346.8 and 4190.598 mg kg -1 for the sludge samples via GC-MS analysis. The effects of the release of the industrial effluents caused the increase in pH, 5.2-5.3 across the studied samples. Conductivity measurements for the sludge, soil and water samples gave readings of 0.27, 0.25 and 0.48 µs cm -1 respectively. The presence and distribution of different heavy metals varied whereby the presence of cadmium (0.139 mg/l), cobalt (0.34 mg/l) and nickel (0.606 mg/l) in the water samples were above the WHO permissible limits. The highest concentrations of iron (108.77 mg/kg) and zinc (11.072 mg/kg) where observed in the soil samples while chromium (24.25 mg/kg), lead (3.902 mg/kg), mercury (0.21 mg/kg), arsenic (0.417 mg/kg), copper (2.015 mg/kg) and manganese (82.695 mg/kg) where highest in the sludge samples. Total bacterial enumeration revealed a count of 7.29 x 10 3 (cfu/g), 1.84 x 10 3 (cfu/g) and 1.32 x 10 3 (cfu/ml) in the soil, sludge and water samples respectively. The presence and concentrations of these mixed pollutants via the activities of the refinery resulted in change of known physicochemical properties which in turn affects the vegetative and microbial flora within the area.

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The Isiokpo Oil-Pipeline Leakage: Total Organic Carbon/Organic Matter Contents of Affected Soils

Cited by 45 publications

References 2 publications

Remediation of Mild Crude Oil Polluted Fresh Water Wet Land with Organic and Inorganic Fertilizer

Remediation of Mild Crude Oil Polluted Fresh Water Wet Land with Organic and Inorganic Fertilizer

Dynamics of Chemical and Biological Properties of Organically Amended Petroleum Hydrocarbon Polluted Soil as Affected by Incubation Periods

Characterization of Environmental Samples around an Indigenous Refinery in Nigeria

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