Exposure risks to polycyclic aromatic hydrocarbons by humans and livestock (cattle) due to hydrocarbon spill from petroleum products in Niger-delta wetland

Ugochukwu, Uzochukwu C.; Ochonogor, A E; Jidere, Chika; Agu, Chizoba; Nkoloagu, Frida; Ewoh, John; Okwu-Delunzu, Virginia U.

doi:10.1016/j.envint.2018.03.010

Cited by 33 publications

(15 citation statements)

References 26 publications

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“…These organic pollutants are generally highly persistent, have low degradability, and can become trapped for long periods of time in the soil minerals of contaminated sites, and subsequently bioaccumulated, due to their hydrophobic and stable chemical properties 3–5 . Because they have potentially adverse effects on human health and multiple environments (aquatic, terrestrial, and atmospheric), the contamination of these organic pollutants is a cause of great environmental concerns, which necessities the need to restore contaminated sites 1,6–10 .…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of naphthalene, BTEX, and aliphatic hydrocarbons by Paraburkholderia aromaticivorans BN5 isolated from petroleum-contaminated soil

Lee

Jeon

2019

Sci Rep

120

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To isolate bacteria responsible for the biodegradation of naphthalene, BTEX (benzene, toluene, ethylbenzene, and o-, m-, and p-xylene), and aliphatic hydrocarbons in petroleum-contaminated soil, three enrichment cultures were established using soil extract as the medium supplemented with naphthalene, BTEX, or n-hexadecane. Community analyses showed that Paraburkholderia species were predominant in naphthalene and BTEX, but relatively minor in n-hexadecane. Paraburkholderia aromaticivorans BN5 was able to degrade naphthalene and all BTEX compounds, but not n-hexadecane. The genome of strain BN5 harbors genes encoding 29 monooxygenases including two alkane 1-monooxygenases and 54 dioxygenases, indicating that strain BN5 has versatile metabolic capabilities, for diverse organic compounds: the ability of strain BN5 to degrade short chain aliphatic hydrocarbons was verified experimentally. The biodegradation pathways of naphthalene and BTEX compounds were bioinformatically predicted and verified experimentally through the analysis of their metabolic intermediates. Some genomic features including the encoding of the biodegradation genes on a plasmid and the low sequence homologies of biodegradation-related genes suggest that biodegradation potentials of strain BN5 may have been acquired via horizontal gene transfers and/or gene duplication, resulting in enhanced ecological fitness by enabling strain BN5 to degrade all compounds including naphthalene, BTEX, and short aliphatic hydrocarbons in contaminated soil.

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Section: Introductionmentioning

confidence: 99%

Biodegradation of naphthalene, BTEX, and aliphatic hydrocarbons by Paraburkholderia aromaticivorans BN5 isolated from petroleum-contaminated soil

Lee

Jeon

2019

Sci Rep

120

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“…where D = exposure dose; RfD = reference dose for the heavy metals; HQ 1 to HQ 5 are the hazard quotients for each of the heavy metals. The equations for computing the chronic exposure dose of the sediments via entry routes such as inadvertent oral ingestion and dermal contacts and definitions of the terms in the equations are as reported in Ugochukwu et al [38].…”

Section: Non-carcinogenic Risks Of Exposure To Heavy Metals As a Resumentioning

confidence: 99%

Ecological and human health exposure risks to heavy metals in Oji River sediments: effect of abattoir and power station

et al. 2019

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In this study, the ecological and human health exposure risks due to the effects of abattoir and power station on heavy metal input into the sediments of Oji River in Enugu State Nigeria were assessed. Heavy metals in the sediments were measured using atomic absorption spectrometry. Pollution of the sediments was assessed using: contamination factor (CF), degree of contamination (CD), geochemical accumulation index (I geo ) and pollution load index (PLI), whereas the ecological risk was assessed using potential ecological risk index. Non-carcinogenic risks of exposure by humans to the heavy metals were assessed using hazard index. Obtained results indicate that the abattoir contributed to heavy metal input into the sediments significantly (unlike the power station) and most likely due to the use of waste tires at the abattoir as fuel. All pollution parameters (CF, CD, I geo and PLI) reveal that pollution of the sediment with heavy metals around the abattoir is most profound and the ecological risk of heavy metals in the sediments is very high. Non-carcinogenic risk of exposure to heavy metals due to inadvertent ingestion and contact with sediments is insignificant.

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“…9 and 10. The equations and parameter values for computing the chronic exposure dose of the sediments are as reported in Ugochukwu et al [34]. Exposure term is assumed to be 3 h a day, 7 days a week, 52 weeks a year, exposure period of 35 years [35].…”

Section: Perfn (8)mentioning

confidence: 99%

Sediments and Water Column Contamination by Heavy Metals in Ekulu River, Nigeria: Ecological and Human Health Risk Assessment

et al. 2019

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Acid mine drainage from a defunct coal mine, agricultural run-off and indiscriminate waste disposal constitute major threat to the quality of Ekulu river of Enugu State, Nigeria. In this study, Ekulu river sediments and water column pollution by heavy metals and the associated ecological and human health exposure risks were assessed. The heavy metals were measured using atomic absorption spectrometry. The parameters used in assessing the pollution of the sediments were contamination factor, contamination degree, geochemical accumulation index and pollution load index whereas the ecological risk of the heavy metals in the sediments was assessed using potential ecological risk index. The parameters employed in assessing the carcinogenic and non-carcinogenic risks of exposure by humans to the heavy metals were hazard index and risk index. The results obtained indicate that the chromium and lead input into the sediments around the defunct coal mine area during the wet season was significant and most probably due to the discharge of acid coal mine drainage into the river. Elevated values of ecological and human health exposure risks around 4 km distance away (Damija) from the defunct coal-mine area are most likely due to anthropogenic activities.

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Exposure risks to polycyclic aromatic hydrocarbons by humans and livestock (cattle) due to hydrocarbon spill from petroleum products in Niger-delta wetland

Cited by 33 publications

References 26 publications

Biodegradation of naphthalene, BTEX, and aliphatic hydrocarbons by Paraburkholderia aromaticivorans BN5 isolated from petroleum-contaminated soil

Biodegradation of naphthalene, BTEX, and aliphatic hydrocarbons by Paraburkholderia aromaticivorans BN5 isolated from petroleum-contaminated soil

Ecological and human health exposure risks to heavy metals in Oji River sediments: effect of abattoir and power station

Sediments and Water Column Contamination by Heavy Metals in Ekulu River, Nigeria: Ecological and Human Health Risk Assessment

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