Bacteriological and Polycyclic Aromatic Hydrocarbon Accumulation in Mangrove Oyster (Crassostrea tulipa) from Douglas Creek, Nigeria

Eduok, Samuel; Ebong, Godwin Asukwo; Udoinyang, E. P.; Njoku, J. N.; Eyen, E. A.

doi:10.3923/pjn.2010.35.42

Cited by 13 publications

(8 citation statements)

References 12 publications

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“…The Qua Iboe estuary (Figure ) is located within 4°30′N and 4°45′N and longitude 7°30′E and 8°45′E as a dominant hydrographical feature in the Niger Delta region of Nigeria . In the estuary, cases of environmental perturbations have been recognised as a result of pollution from nearby oil exploration activities and gas flaring .…”

Section: Introductionmentioning

confidence: 99%

Rainwater Chemistry Within the Vicinity of Qua Iboe Estuary, Nigeria

Akpan¹,

Udosen

Offiong

2018

CLEAN Soil Air Water

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The Qua Iboe River estuary is one of the most studied ecosystems in the Niger Delta of Nigeria given its proximity to intense industrial activities. There have been concerns regarding possible environmental contamination, which has led to several monitoring studies. In this study, some trace metals (Zn, Mn, Cu, Fe, Cr, Pb, Ni, Cd) in rainwater samples collected around the estuary were investigated using standard analytical methods. Rainwater samples were also analysed for physicochemical characteristics. The results obtained revealed varied levels of trace metals and physicochemical parameters across dry and wet seasons. The average abundance of trace metals in rainwater samples from the study locations is in the order: Fe > Zn > Mn > Cr > Cu > Ni > Cd > Pb. In addition, predominant anions in rainwater samples are in the order CnormalO32−>Cl−>NnormalO3−>SnormalO42−>S2–>CN–. Results from statistical analyses reveal the relationships across parameters as well as the discrimination of monitored sites based on the intensity of industrial activities. Principal component analysis reveals that soil dust, sea salt, and fossil fuel combustion are major factors affecting the rainwater chemistry of the study area. The significant amounts of trace metals and the physicochemical parameters quantified in the rainwater samples indicate some level of contamination. However, these levels do not indicate serious pollution problems at present.

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Section: Introductionmentioning

confidence: 99%

Rainwater Chemistry Within the Vicinity of Qua Iboe Estuary, Nigeria

Akpan¹,

Udosen

Offiong

2018

CLEAN Soil Air Water

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“…For instance, Eduok et al [35] reported total PAHs level of 7.51 mg/l for Douglas Creek. On the other hand, Oruambo et al [36] reported a maximum total of 0.149 mg/l for several drinking water sources in Akwa Ibom State.…”

Section: Levels Of Polycyclic Aromatic Hydrocarbons (Pahs)mentioning

confidence: 99%

Physicochemical Characteristics and Health Risk Assessment of Drinking Water Sources in Okoroette Community, Eastern Coast of Nigeria

Inam¹,

Inoh²,

Offiong³

et al. 2017

AJWR

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The coastal region of Nigeria has witnessed intense anthropogenic activities that have overtime necessitated several environmental monitoring campaigns to ascertain impacts and proffer remedial solutions. In the present study, standard analytical protocols were employed to assess the physicochemical parameters, trace metals and polycyclic aromatic hydrocarbons (PAHs) levels of ground and surface water used for drinking purposes in Okoroette community in Nigeria. The results obtained show that investigated parameters varied widely and were generally higher in the surface water samples collected during the dry season. The levels of most of the physicochemical parameters recorded were acceptable when compared with Nigerian Standards for Drinking Water Quality (NSDWQ) except for turbidity and dissolved oxygen. In both ground and surface waters, the following trace metals exceeded the NSDWQ permissible limits: Pb, Cd, Fe, and Mn. The total mean level of PAHs (> 1.0 mg/l) in both ground and surface water samples exceeded the acceptable level when compared with the NSDWQ guideline value of 0.007 mg/l. The health risk assessment applied on trace metal levels reveal that there is significant potential toxic risk to exposed individuals as calculated hazard indexes (HI) were greater than one. Results from Water Quality Indices (WQI) modelling reveal that the water sources in the community were generally categorised as poor quality or unfit for drinking purposes. Chemometric characterisation of the water quality indicators revealed that some of the contaminants may be of geogenic, anthropogenic organic in origin. The study reveals that drinking water sources in Okoroette community are not suitable for consumption and domestic use therefore treatment is highly and urgently recommended to safeguard public health.

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“…The high level of HMW-PAHs in fish from these sample locations may be due to uptake and bioavailability of these contaminants in the studied environment. Eduok et al (2010) reported that the stability of PAH molecules and hydrophobicity are two factors which contribute to the persistence of HMW PAHs in the environment. Nyarko et al (2011) attributed the dominance of HMW-PAHs in fish from Ghana to the degradation of LMW-PAHs during PAH transport and burial into sediments.…”

Section: Levels Of Pahs In Tilapia Zilli From Qirementioning

confidence: 99%

“…Food consumption is an important pathway of human exposure to many contaminants including PAHs (Olaji et al, 2014) and most human cancers such as prostrate and lung cancer are linked with dietary sources (Khoei et al, 2013). Apart from microbial agents, gastrointestinal disorder prevalent in the population around the lower reach of QIRE may be due to direct uptake of PAHs through the consumption of aquatic biota (Eduok et al, 2010).…”

Section: Levels Of Pahs In Tilapia Zilli From Qirementioning

confidence: 99%

“…Nkpa et al (2013) reported that the level of contaminants such as PAHs in fish reflect the state of contamination of the medium or environment where the fish is caught. According to Eduok et al (2010) PAH residues in QIRE have been linked with atmospheric deposition, runoffs, sewage, industrial waste, municipal waste and petroleum exploration and production activities. Nyarko et al (2011) also attributed PAH levels in fish to contact with fishing net contaminated with oil from oil slicks and PAH contaminated plastics dumped into the aquatic water body.…”

Section: Levels Of Pahs In Tilapia Zilli From Qirementioning

confidence: 99%

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Levels of Polycyclic Aromatic Hydrocarbons (PAHs) and Associated Health Risk in Tilapia zilli from Qua Iboe River Estuary, Niger Delta, Nigeria

Etuk¹,

Moses²,

Ebong³

2016

IJSRES

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Abstract.Intensive oil activities within the study area have elevated the level of toxic substances in both aquatic and terrestrial environments of the host communities. Levels of polycyclic aromatic hydrocarbons in Tilapia zilli from Qua Iboe River estuary (QIRE) Nigeria and the carcinogenic health risk induced by its consumption were studied. Fish samples were collected from five stations and a Control during wet and dry seasons and analyzed for PAHs using gas chromatography with flame ionization detector. Carcinogenic health risk assessment using recommended models by USEPA was done. Concentrations of total PAHs ranged from 1.527E-03 to 5.986E-02 mg/kg, high molecular weight PAHs recorded a range of 1.239E-03 to 1.424E-01 mg/kg while low molecular weight PAHs ranged from 2.814E-04 to 3.166E-03 mg/kg. Concentrations of C-PAHs at the study area were higher than at the Control site. Levels of B(a)P in Tilapia zilli for both seasons were lower than the EU limit however, the potency equivalent concentrations due to exposure to C-PAHs via its at all locations in both seasons were above the screening value. Thus, consumption of Tilapia zilli from the area studied may result in carcinogenic health effect. The study also identified presence of anthropogenic inputs of PAHs and pyrogenic PAHs originated from gas flaring in the area. Regulatory legislation on environment should be instituted to forestall sub lethal effect on aquatic flora, fauna and human.

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Bacteriological and Polycyclic Aromatic Hydrocarbon Accumulation in Mangrove Oyster (Crassostrea tulipa) from Douglas Creek, Nigeria

Cited by 13 publications

References 12 publications

Rainwater Chemistry Within the Vicinity of Qua Iboe Estuary, Nigeria

Rainwater Chemistry Within the Vicinity of Qua Iboe Estuary, Nigeria

Physicochemical Characteristics and Health Risk Assessment of Drinking Water Sources in Okoroette Community, Eastern Coast of Nigeria

Levels of Polycyclic Aromatic Hydrocarbons (PAHs) and Associated Health Risk in Tilapia zilli from Qua Iboe River Estuary, Niger Delta, Nigeria

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