Mobility and Sequential Extraction of Potentially Toxic Elements in Sediment of Lagos Lagoon

Basheeru, Kazeem A.; Okoro, Hussein K.; Adekola, Folahan A.; Abdus-Salam, N.

doi:10.1007/s42250-020-00218-4

Cited by 7 publications

(7 citation statements)

References 43 publications

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“…Moreover, comparing results from the present study with the assessment of metal contamination in sediment samples collected from Lagos dockyard harbour by Basheeru et al [42], the contamination level of lagoon sediment with lead and copper is higher compared to the contamination level of ABUAD soils. In another work carried out by some researchers on estuary sediments from Olonkoro river, Oyo state, Nigeria [43], it was found that the concentration level of Zn, Cu, Zn, and Mn were also higher.…”

Section: Resultssupporting

confidence: 66%

Assessment of Heavy Metal Pollution Status in Surface Soil of a Nigerian University

Lala

Kawu

Adesina

et al. 2022

J. Nig. Soc. Phys. Sci.

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The problem of urban soil contamination with heavy metals due to rapid urbanization and industrialization has been a major concern in recent years. A university can be considered as a product of industrialization and urbanization which is associated with different activities that may induce heavy metals pollution into the environment. Therefore, this research work assessed the contamination level of chromium (Cr), copper (Cu), lead (Pb), zinc (Zn) and manganese (Mn) in surface soils of Afe-Babalola university (ABUAD) using various indices. Soil samples were taken from ten (10) different functional sites in the university. These samples were taken to the laboratory and analyzed for chromium (Cr), copper (Cu), lead (Pb), zinc (Zn) and manganese (Mn) using standard method. The mean concentrations of copper (Cu), chromium (Cr) and lead (Pb) were up to 0.75, 0.66 and 0.36 mg/g respectively, while manganese (Mn) and zinc (Zn) were 1.37 and 0.49 mg/g respectively. The average concentration of manganese (Mn) was comparable to its corresponding natural background value, but the average concentration of chromium (Cr), copper (Cu), zinc (Zn) and lead (Pb) were higher. They were approximately of the ratio 1:7, 1:2, 1:3 and 1:2 respectively compared to their corresponding natural background value. The multivariate statistical analyses indicated that vehicles, power generating sets, petrol station, machine workshops, production plants and emissions from outdoor roasted food spots were the major sources of heavy metals contamination on the universitys’ soil. The results from contamination indices and assessment showed that the contamination level of soils within the university can generally be classified as moderately contaminated. Therefore, periodic assessment of the sources and associated ecological risks of the heavy metals is highly recommended. This is to enable decision-makers to effectively manage the environment in the manner that will preserve public and ecosystem health.

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Section: Resultssupporting

confidence: 66%

Assessment of Heavy Metal Pollution Status in Surface Soil of a Nigerian University

Lala

Kawu

Adesina

et al. 2022

J. Nig. Soc. Phys. Sci.

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“…Sample preparation was done in accordance with the method adopted by other researchers with modifications [2]. About 25 ml of the water samples was weighed into a 50 ml digester tube.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Cluster analysis was performed based on squared Euclidean distance and Ward's linkage method in line with some researchers [2,58]. From Fig.…”

Section: Cluster Analysis (Ca) On Potentially Toxic Elements In Lagos...mentioning

confidence: 99%

“…In lagoon systems, metal tends to accumulate in sediment in association with organic matter and it may be released into the water body due to changes in environmental conditions such as pH, dissolved oxygen, and temperature [2]. Mineral elements such as zinc, copper, manganese, iron, and calcium are classified as essential elements, and they play a lot of physiological functions in the body of living organisms.…”

Section: Introductionmentioning

confidence: 99%

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Spatio-temporal monitoring of potentially toxic elements in Lagos harbour water and its health risk implications

et al. 2022

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Continuous discharge of industrial and domestic inputs from various processes into the Lagos lagoon has significantly affected the quality of the aquatic environment, as a result of potentially toxic elements (PTEs) being released into the harbour during anthropogenic activities. This study involved monitoring the concentration and distribution of heavy metals in Lagos harbour during the dry and wet seasons. The PTEs can pose a serious ecological threat to the marine environment as well as human beings when the level of priority metals like cadmium, lead, and chromium is beyond World Health Organization (WHO) limits of 0.003, 0.05, and 0.1 mg/L, respectively. The shipping activities within the harbour play a significant role in the generation of these toxic metals. The diverse nature of these metals coexisting with their oxidation states in aquatic environments and their bioaccumulation influences the toxicity of PTEs towards the living organism. The quantification of these metals with highly selective and accurate instrumentation is imperative. Ion-selective exchangers and other functionalized composite nanomaterial are critical for harbour water remediation because of the high risk that could be associated with prolonged exposure to these toxic elements especially when the carcinogenic risk value is greater than 1 × 10−6 mg/kg/day.

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“…Operationally defined fractionation of elements in various environmental samples has been conducted using sequential leaching methods. Examples are river sediments [13][14][15], soils [16][17][18], coal ash [4,19,20], green liquor dregs [21], black shale [22], phosphogypsum [23], sewage sludges [24][25][26], and mine wastes [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Fractionation of Metal(loid)s in Three European Mine Wastes by Sequential Extraction

2022

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Mine waste can constitute an environmental hazard, especially when poorly managed. Environmental assessment is essential for estimating potential threats and optimizing mine waste management. This study evaluated the potential environmental risk of sulfidic mine waste samples originating from the Neves Corvo Mine, Portugal, and the closed Freiberg mining district, Germany. Metal(loid)s in the waste samples were partitioned into seven operationally defined fractions using the Zeien and Brummer sequential extraction scheme. The results showed similar partitioning patterns for the elements in the waste rock and tailing samples from Neves Corvo Mine; most metal(loid)s showed lower mobility, as they were mainly residual-bound. On the contrary, the Freiberg tailing sample had considerably elevated (24–37%) mobile fractions of Zn, Co, Cd, and Mn. The majority of Fe (83–96%) in all samples was retained in the residual fractions, while Ca was highly mobile. Overall, Pb was the most mobile toxic element in the three samples. A large portion of Pb (32–57%) was predominantly found in the most mobilizable fractions of the studied waste samples. This study revealed that the three mine wastes have contamination potential for Pb and Zn, which can be easily released into the environment from these waste sources.

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Mobility and Sequential Extraction of Potentially Toxic Elements in Sediment of Lagos Lagoon

Cited by 7 publications

References 43 publications

Assessment of Heavy Metal Pollution Status in Surface Soil of a Nigerian University

Assessment of Heavy Metal Pollution Status in Surface Soil of a Nigerian University

Spatio-temporal monitoring of potentially toxic elements in Lagos harbour water and its health risk implications

Fractionation of Metal(loid)s in Three European Mine Wastes by Sequential Extraction

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