Chemical and ecotoxicological assessment of polycyclic aromatic hydrocarbon—contaminated sediments of the Niger Delta, Southern Nigeria

Olajire, Abass A.; Altenburger, Rolf; Küster, Eberhard; Brack, Werner

doi:10.1016/j.scitotenv.2004.08.014

Cited by 118 publications

(63 citation statements)

References 43 publications

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“…The presence of naphthalene in Hong Kong mangrove sediments at 10-20% of the total PAH concentrations was presumed to stem mainly from anthropogenic activities, especially petrogenic inputs (Tam et al 2001). When the ratio of the concentration of naphthalene to that of phenanthrene is greater than one then fresh and unweathered petroleum is indicated (Dahle et al 2003;Olajire et al 2005). Inspection of Table 6 reveals that only one of our samples satisfied this condition, i.e.…”

mentioning

confidence: 86%

Organic and metal contamination in surface mangrove sediments of South China

Vane

Harrison

Kim

et al. 2009

Marine Pollution Bulletin

128

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mentioning

confidence: 86%

Organic and metal contamination in surface mangrove sediments of South China

Vane

Harrison

Kim

et al. 2009

Marine Pollution Bulletin

128

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“…Since empirical evidence that aromatic hydrocarbons exist in the Niger Delta marine ecosystem due to extensive crude oil and gas exploitation, fire explosions, leachlets from decomposing refuse and industrial effluents (Okoro and Ikolo, 2005;Anyakora et al 2004;Anyakora and Coker 2006;Olajire et al, 2005), native microbes could be assisting Nigerians in the Niger Delta region in cleaning water system unnoticeable and free of charge. From our work (Nduka and Orisakwe, 2011), fewer or no counts of achromobacter and aspergillus (polyaromatic hydrocarbon (PAHs) degraders) and proteus (straight chain hydrocarbon degraders) were found in most water samples while bacillus and pseudomonas, both PAHs and straight chain hydrocarbon degraders (Rosenberg, 1993), were found in highest counts and in almost all the water samples.…”

Section: Micro-bial Degradationmentioning

confidence: 99%

Crude Oil and Fractional Spillages Resulting from Exploration and Exploitation in Niger-Delta Region of Nigeria: A Review About the Environmental and Public Health Impact

Nduka¹,

Obumselu²,

Umedum³

2012

Crude Oil Exploration in the World

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“…Operational activities around petroleum refineries like several in the Niger Delta region of Nigeria are renowned for its cumulative oil spills due to large oil deposits [3][4][5]. These sites are poorly and most often never investigated to know the extent of petroleum hydrocarbon contamination and as a result there is high possibility of accumulation of these pollutants in the food chain by their consumption in drinking water, fish and crops, which could pose a risk to human and other terrestrial and aquatic life [6][7][8].…”

Section: Introductionmentioning

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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Chemical and ecotoxicological assessment of polycyclic aromatic hydrocarbon—contaminated sediments of the Niger Delta, Southern Nigeria

Cited by 118 publications

References 43 publications

Organic and metal contamination in surface mangrove sediments of South China

Organic and metal contamination in surface mangrove sediments of South China

Crude Oil and Fractional Spillages Resulting from Exploration and Exploitation in Niger-Delta Region of Nigeria: A Review About the Environmental and Public Health Impact

Characterization of Environmental Samples around an Indigenous Refinery in Nigeria

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