A study of natural attenuation processes involved in a microcosm model of a crude oil-impacted wetland sediment in the Niger Delta

Abu, Gideon O.; Dike, Paschal O.

doi:10.1016/j.biortech.2007.09.063

Cited by 32 publications

(22 citation statements)

References 9 publications

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“…There are a number of microorganisms in the wetlands which are important in the bioremediation of crude oil-polluted environments (Benka-Coker and Ekundayo 1995). Their importance to natural cleaning processes specifically photo-oxidation, volatilisation, evaporation and biodegradation in the removal of crude oil is also emphasised (Abu and Dike 2008).…”

Section: Ecosystem Services Provided By Niger Delta Wetlandsmentioning

confidence: 99%

The Niger Delta wetlands: threats to ecosystem services, their importance to dependent communities and possible management measures

Adekola

Mitchell

2011

International Journal of Biodiversity Science, Ecosystem Servic

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The Niger Delta wetlands are changing rapidly, raising concern for the wetlands' health and for communities relying upon its ecosystem services. Knowledge on ecosystem service provision is important for effective ecosystem and livelihoods management, but is currently lacking for the Niger Delta. We synthesised literature and used the 'Drivers-pressure-state-impact-response' (DPSIR) framework to structure information on changes in the wetlands' ecosystem services and implications for dependent communities. The wetlands' ecosystem services are being eroded through oil and gas exploration, dredging, invasive plant infestation and wetland reclamation. This is exacerbated by rising demand for oil, population growth and weak governance. Mass fish migration, water pollution and reduction of wetland area are also evident, impacting ecosystem services and traditional livelihood systems. This has caused poverty; people have to buy goods that previously could be obtained from the wetlands. Effective wetland management will be aided by: recognition of ecosystem services' contributions to community well-being; understanding how benefits are distributed over time, space, stakeholder; and how these changes in response to pressures. Since key pressures in the wetland are anthropogenic, understanding the role of institutions in relation to the Niger Delta's ecosystem services is imperative.

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Section: Ecosystem Services Provided By Niger Delta Wetlandsmentioning

confidence: 99%

The Niger Delta wetlands: threats to ecosystem services, their importance to dependent communities and possible management measures

Adekola

Mitchell

2011

International Journal of Biodiversity Science, Ecosystem Servic

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“…It is estimated that between 1.7 and 8.8 million metric tons of oil are released into the world's water and soil every year ((NAS) NAoS 1985; Abu and Dike 2008), 90 % of which is directly related to human activities including deliberate waste disposal. It is also estimated that about 30 % of the spilled oil enters freshwater systems (Henry 2001).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of diesel fuel degradation in contaminated soil using organic wastes

Dadrasnia

Agamuthu

2013

Int. J. Environ. Sci. Technol.

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Bioremediation is an effective measure in dealing with such contamination, particularly those from petroleum hydrocarbon sources. The effect of soil amendments on diesel fuel degradation in soil was studied. Diesel fuel was introduced into the soil at the concentration of 5 % (w/w) and mixed with three different organic wastes tea leaf, soy cake, and potato skin, for a period of 3 months. Within 84 days, 35 % oil loss was recorded in the unamended polluted soil while 88, 81 and 75 % oil loss were recorded in the soil amended with soy cake, potato skin and tea leaf, respectively. Diesel fuel utilizing bacteria counts were significantly high in all organic wastes amended treatments, ranging from 111 9 106 to 152 9 106 colony forming unit/gram of soil, as compared to the unamended control soil which gave 31 9 106 CFU/g. The diesel fuel utilizing bacteria isolated from the oil-contaminated soil belongs to Bacillus licheniformis, Ochrobactrum tritici and Staphylococcus sp. Oil-polluted soil amended with soy cake recorded the highest oil biodegradation with a net loss of 53 %, as compared to the other treatments. Dehydrogenase enzyme activity, which was assessed by 2,3,5-triphenyltetrazolium chloride technique, correlated significantly with the total petroleum hydrocarbons degradation and accumulation of CO 2 . First-order kinetic model revealed that soy cake was the best of the three organic wastes used, with biodegradation rate constant of 0.148 day -1 and half life of 4.68 days. The results showed there is potential for soy cake, potato skin and tea leaf to enhance biodegradation of diesel in oil-contaminated soil.

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“…To better understand the environmental fate of ETBE in the subsurface, further study of ETBE sorption and transfer in water and soil systems needs to be carried out. Besides soil properties, e.g., organic matter content and characters (Greenwood et al 2007;Shih 2007), and mineral sorption of organic matter (Dontsova and Bigham 2005;Gu and Karthikeyan 2005), sorption process can also be affected by environmental factors such as temperature, presence of dissolved organic matter, pH, ionic strength, type of solution cations (Abu and Dike 2008;Tremblay et al 2005), and the physicochemical properties of organic pollutants. Yu et al (2005) and Inal et al (2009) have done some research on sorption of ETBE and MTBE to granular activated carbon, respectively.…”

Section: Introductionmentioning

confidence: 99%

Sorption characteristics of ethyl tert-butyl ether to Chinese reference soils

Zhu

2011

Environ Earth Sci

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As a gasoline additive, ethyl tert-butyl ether (ETBE) has great market potential and its utilization might cause groundwater contamination problem. However, little research has been done on its sorption in soil. In this study, the sorption characteristics of ETBE to Chinese reference soils were studied in batch experiments. The results showed that the ETBE sorption to six soils can be described by linear sorption isotherm. The temperature influences the sorption process of ETBE to soils. The negative sorption enthalpy (DH \ 0) indicated that the sorption process was exothermic. Furthermore, DH is in a range from -8 to -32 kJ/mol. This showed that van der Waals forces and other specific interactions happened simultaneously in the sorption process. With the increasing ionic strength, content of ETBE sorption to all soils decreased, which is probably also an indication of other sorption mechanisms besides ETBE partitioning into soil organic carbon.

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A study of natural attenuation processes involved in a microcosm model of a crude oil-impacted wetland sediment in the Niger Delta

Cited by 32 publications

References 9 publications

The Niger Delta wetlands: threats to ecosystem services, their importance to dependent communities and possible management measures

The Niger Delta wetlands: threats to ecosystem services, their importance to dependent communities and possible management measures

Dynamics of diesel fuel degradation in contaminated soil using organic wastes

Sorption characteristics of ethyl tert-butyl ether to Chinese reference soils

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