Partitioning Of Some Trace Metals in Floodplain Soil in Onitsha, Anambra State, Nigeria.

Onwukeme, Onwukeme

doi:10.9790/5736-0411925

Cited by 3 publications

(5 citation statements)

References 15 publications

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“…The inactive form of cadmium had least value of 1.0mg/kg (Table 2). The low value was also reported in our previous study [23].…”

Section: Fig 4 % Occurrence Of Zn In the Fractionssupporting

confidence: 88%

“…The inactive form of cadmium had least value of 1.0mg/kg (Table 2). The low value was also reported in our previous study [23]. The 52.6% bioavailability of cadmium in this study area revealed the gradual pollution by this metal, taking into account the toxic nature of this metal even at low concentration [31].…”

Section: Fig 4 % Occurrence Of Zn In the Fractionssupporting

confidence: 80%

“…The high level of cadmium in carbonate bounded fraction (21.05%) cum exchangeable phase (31.58%), (which are known to be major contributors to mobility and bioavailability) connotes that, it is bioavailable. Similar reports of cadmium in these phases had been documented [12,23]. Cadmium like mercury exhibits a profound capacity of combining with thiol group (-SH) to form a stable complex.…”

Section: Fig 4 % Occurrence Of Zn In the Fractionssupporting

confidence: 78%

“…The method of Horowitz [13] as modified in our previous works [22,23] was used for the sequential extraction of the trace metals investigated. The procedure is summerized in Table 1 below:…”

Section: Sequential Extraction Proceduresmentioning

confidence: 99%

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Speciation of Some Trace Metals in Floodplain Soil of Eke-Mgbom, Afikpo, Nigeria

Ajala¹,

Onwukeme²,

Mgbemena³

2014

ACSJ

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“…The inactive form of cadmium had least value of 1.0mg/kg (Table 2). The low value was also reported in our previous study [23].…”

Section: Fig 4 % Occurrence Of Zn In the Fractionssupporting

confidence: 88%

Section: Fig 4 % Occurrence Of Zn In the Fractionssupporting

confidence: 80%

Section: Fig 4 % Occurrence Of Zn In the Fractionssupporting

confidence: 78%

Section: Sequential Extraction Proceduresmentioning

confidence: 99%

See 2 more Smart Citations

Speciation of Some Trace Metals in Floodplain Soil of Eke-Mgbom, Afikpo, Nigeria

Ajala¹,

Onwukeme²,

Mgbemena³

2014

ACSJ

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show abstract

“…However, since the heavy metals detected in his study are the same, the contrast could be as a result of environmental changes and difference in sampling points, methods, and detection range of equipment used. The concentration levels of heavy metals in environment are continually changing due to human activities (Onwukeme et al 2013), and metals are susceptible to pH changes and are also soluble (Halim et al 2014;Skvaria 1991;Tessier et al 1979). Earlier studies (Xianagding et al 2001;Dara 1993) discovered that natural soils contain appreciable amount of iron.…”

Section: Resultsmentioning

confidence: 98%

Analysis of heavy metals’ contamination in soils and water at automobile junk markets in Obosi and Nnewi, Anambra State, Southeastern Nigeria

2015

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Auto junk markets have been observed to be one of the sources of heavy metal pollution in soils and water. The aim of this study is to assess the level of heavy metal pollution within two largest auto junk markets in Nigeria at Obosi and Nnewi, respectively. Twenty-four (24) composite soil samples including the background (control) samples at 0-15 and 15-30 cm depths, and six (6) water samples were randomly collected. Samples were properly digested and subjected to spectroscopic analysis using atomic absorption spectrometer (AAS) for trace metals. Seven selected heavy metals (Fe, Cu, Ni, Cr, Zn, Mn, and Pb) were analyzed in three replicates. The results revealed that trace metals' concentration (ppm) in 0-30 cm depth are well above the background values with Ni in excess of international standard. Metal enrichment is in the order of Ni > Fe >> Zn > Cu > Mn > Pb > Cr. Results of heavy metals obtained from the water samples revealed that Mn, Fe, Cu, and Ni are in excess when compared with the World Health Organization (WHO 2009) and Nigerian Standard for Drinking Water Quality (NSDWQ 2007) standards for drinking water. The pollution load index and contamination factor reveals that the soil around the automobile junk markets are at various stages of pollution with heavy metals, ranging from slight contamination to severe pollution. Water around the automobile junk markets are not advisable for domestic uses, as a result of its heavy metal contents, which are connected to the effects of industrial waste accumulation and indiscriminate domestic waste disposal as suggested by the principal component analysis.

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Can Ecotoxicological Risk Assessment of Heavy Metal in Floodplain Suspended Sediments Bridge the Gap from Present Conditions to Future Environmental Threats?

Ajala,

Obasi,

Fasuan

et al. 2023

Preprint

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Given increasing concerns about the environmental impact of heavy metal pollution, assessing the level of contamination in floodplain suspended sediments is an important task. Effective environmental management and the preservation of an ecosystem depend on understanding existing pollution levels and potential concerns in the future. For this reason, floodplain-suspended sediments from major industrialized cities in Southeast Nigeria were sampled and analyzed for heavy metal contents. The investigation was conducted to evaluate the immediate and long-term bioavailability and pollution status of heavy metals in receptor organisms. A five-step sequential extraction procedure was adopted to fractionate iron, manganese, copper, zinc, nickel, lead, cadmium, and chromium to determine the geochemical phases in which they were distributed. Generally, the heavy metals were partitioned in the following order: residual > > oxidizable > carbonate > reducible > exchangeable. This indicates that a significant portion of the metals was tightly bound to the soil matrix, rendering them not readily bioavailable to the biota, except over an extended period. The levels of heavy metals, except for lead and cadmium in specific areas, were below the saturation point in terms of their bioavailability. Furthermore, the pollution assessment indices, such as the geo-accumulation index, reflected high levels of cadmium, copper, and lead contamination. This suggests a potential ecotoxicological risk to organisms near the sampling sites. The sites were classified as moderate and high risk in terms of immediate and future risk assessment, respectively. Proper cleaning methods and potential site reclamation are imperative to minimize or contain these heavy metals in stable forms within urban areas to prevent bioaccumulation.

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Partitioning Of Some Trace Metals in Floodplain Soil in Onitsha, Anambra State, Nigeria.

Cited by 3 publications

References 15 publications

Speciation of Some Trace Metals in Floodplain Soil of Eke-Mgbom, Afikpo, Nigeria

Speciation of Some Trace Metals in Floodplain Soil of Eke-Mgbom, Afikpo, Nigeria

Analysis of heavy metals’ contamination in soils and water at automobile junk markets in Obosi and Nnewi, Anambra State, Southeastern Nigeria

Can Ecotoxicological Risk Assessment of Heavy Metal in Floodplain Suspended Sediments Bridge the Gap from Present Conditions to Future Environmental Threats?

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