Geochemical evaluation of the Lagos lagoon sediments

Olatunji, Akinade S.; Abimbola, Akinlolu F.

doi:10.1007/bf02840221

Cited by 18 publications

(25 citation statements)

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“…Significant correlation exists between SiO 2 , Fe 2 O 3 , Al 2 O 3 , K 2 O, MgO, and P 2 O 5 . This significant association is an indication that the oxides had been primarily contributed from the weathering of aluminosilicate, ferromagnesian, and apatite-rich minerals in the site (Olatunji and Abimbola, 2010). Cu has a strong relationship with MnO (0.5), Fe (0.566), and Mg (0.603), which is an indication of the role played by iron minerals.…”

Section: Autocorrelationmentioning

confidence: 92%

Geochemical Assessment of Two Excavated Mass Graves in Rwanda: A Pilot Study

Amuno

2013

Soil and Sediment Contamination: An International Journal

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Necrosols are a unique category of anthropogenic soils that are associated with excavated cemeteries or graveyards. In spite of the growing number of cemeteries and burial sites found across urban and rural areas globally, scientific information regarding the contamination potential of this category of soils is relatively scarce and not properly understood. The purpose of this study is to fill this gap by assessing the contamination significance of trace metal contents in the necrosols associated with two excavated mass graves in Rwanda. For this preliminary geochemical investigation, cemetery soil samples were collected from two excavated mass graves in the Murambi memorial site, Rwanda, and analyzed for trace and major element concentrations. The enrichment factor (EF), chemical index of alteration (CIA), and contamination status of necrosol samples was determined in comparison with the offsite area. The results revealed that the average EF values for both onsite and offsite samples were generally within the class of natural background with only six onsite samples having higher EF values than the offsite or background area. Possible reasons for the progressive depletion of the selected trace element onsite are the relatively low anthropogenic activities and higher weathering intensity of the necrosols in comparison with the background area over time. Even though the mean onsite CIA values for the necrosols were slightly higher than the background area, the index further confirmed that both the necrosols and offsite samples were significantly altered to kaolinic degree. From the resulting pollution index values (PI Nemerow ), it can be inferred that the Murambi necrosols were within the range of 0.84 and 1.82, corresponding to the precaution and slightly polluted domain. The current contamination status of the necrosols is likely to have been caused as a result of the anthropogenic input of Cr and Pb onsite relative to the offsite area.

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Section: Autocorrelationmentioning

confidence: 92%

Geochemical Assessment of Two Excavated Mass Graves in Rwanda: A Pilot Study

Amuno

2013

Soil and Sediment Contamination: An International Journal

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“…This section, therefore, reviews how urban geochemical studies have been conducted in Nigeria, with an emphasis on the various methods used in sampling. The methodologies are taken from references already cited, although predominantly based on the work of Fakayode and Onianwa (2002), Odewande (2006), Olatunji (2006), Odukoya (2007), Abimbola et al (2006Abimbola et al ( , 2007 and Odewande and Abimbola (2008).…”

Section: Methods Used In Urban Geochemical Mapping In Nigeriamentioning

confidence: 99%

“…Studies were generally carried out at a density of two samples/km 2 using one medium sample (soil or drainage sediment). Studies have also been conducted by doctoral students working on the soils of Ibadan (Odewande, 2006) and sediments of the Lagos Lagoon (Olatunji, 2006). These studies revealed significant enrichment of metals such as Cd, Cu, Pb, Zn, Tl and W in these areas, or in the case of the lagoon adjacent to areas of dense population, industrial zones and increased vehicular traffic.…”

Section: Review Of Urban Mapping In Nigeriamentioning

confidence: 99%

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Urban Geochemical Mapping in Nigeria with Some Examples from Southern Nigeria

Abimbola

Olatunji

2011

Mapping the Chemical Environment of Urban Areas

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“…The chemical composition of the sediments can be obtained by (a) X-ray fluorescence (XRF) spectrometry, which helps in establishing the presence of major and trace elements (Kolay and Singh 2001a,b;Viguri et al 2002Viguri et al , 2007Bianchini et al 2002) in terms of the metal oxides present in the sediments; (b) High Performance Liquid Chromatography (HPLC), as well as Gas Chromatography and Mass Spectrophometry (GC-MS) analyzers, which identify and quantify Poly Aromatic Hydrocarbon (PAH) (Derenne et al 1992;Ghirardini et al 1999;Liu et al 2000;Viguri et al, 2002Viguri et al, , 2007White et al 2004); and (c) Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES), which serves as a very useful tool for determining the cation-exchange capacity (CEC) and the presence of extractable cations (Horowitz and Elrick 1987;White et al 2004;Bonnin et al 2005;Mitchell and Soga 2005;Yukselen and Kaya 2006;Olatunji and Abimbola 2010). Incidentally, a strong correlation among the OM, CEC, physical characteristics of sediments (viz., clay content and SSA), and geotechnical properties (viz., liquid limit, compressibility characteristics and angle of internal friction) has been demonstrated by researchers (Yang et al 2006).…”

Section: Chemical Characterizationmentioning

confidence: 99%

Characterization of Sediments for Sustainable Development: State of the Art

Sharma

Singh

2014

Marine Georesources & Geotechnology

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Sediments are the particulate matter that are transported by the flow of water and eventually get deposited at the bottom of water bodies, such as oceans, rivers, lagoons, and so forth. The deposition of these materials due to continued intervention of natural as well as anthropogenic activities is a serious concern as the storage capacity (or health) of the system is reduced or otherwise affected. Keeping in view the emerging challenges associated with proper disposal and subsequent utilization of sediments, as a manmade resource, their extraction from such locations becomes necessary. Hence, it is essential to characterize the sediments in order to devise strategies to exploit them as a manmade resource in the best possible manner. With this in view, this article highlights the importance of different attributes and aspects of the sediments (viz., physical, chemical, morphological, geotechnical, toxicological, and microbial characteristics) deposited in the water bodies that will help in assessing their potential as a substitute material to natural resources.

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Geochemical evaluation of the Lagos lagoon sediments

Cited by 18 publications

References 0 publications

Geochemical Assessment of Two Excavated Mass Graves in Rwanda: A Pilot Study

Geochemical Assessment of Two Excavated Mass Graves in Rwanda: A Pilot Study

Urban Geochemical Mapping in Nigeria with Some Examples from Southern Nigeria

Characterization of Sediments for Sustainable Development: State of the Art

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