Sequential Analysis of Metals in Municipal Dumpsite Composts of Kano Metropolis, Nigeria

Jimoh, Wlo; Sabo, Y

doi:10.4314/bajopas.v6i1.18

Cited by 5 publications

(4 citation statements)

References 21 publications

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“…The highest concentration of Cr, Cd and Hg were found in the residual and organic fractions. This result agreed with the work of [12] who reported that the greatest percentage of Cr, Cd and Hg are in the residual and organic phases while Zn is found more in the residual and reducible phases. This disagreed with the work earlier reported by [10] that most metals are associated with exchangeable and organic phase.…”

Section: Resultssupporting

confidence: 93%

Untitled

2018

RJLBPCS

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Sequential extraction was used to fractionate seven heavy metals (Pb, Ni, Zn, Cd, Cr, As and Hg) in soils from mining and control sites in Akwana and environs into five pools: exchangeable, carbonate, Fe-Mn oxide, organic and residual. AAS was used to analyze the samples. The percentage bioavailability of all the metals analyzed were higher than 50% in all the sites with the exception of Cr (49.50%) in the control site. This indicates that As, Ni, Hg and Pb are highly bioavailable and are known to be a cumulative poison in plants and mammals when its accumulation is above the threshold. Percentage bio availabilities of these seven heavy metals in the studied soils were in the order in the mining and control sites: As>Pb>Ni>Zn>Hg>Cr>Cd; Pb>Zn>>As>Hg>Ni>Cd>Cr. This indicates that lead and nickel had the highest chance of being accumulated. The enrichment Factor values for Pb, Ni, Zn, Cd, Cr, As and Hg were 1.488, 2.346, 1.056, 1.978, 1.222, 1.587 and 1.152 which indicates environmental pollution. Result obtained by spearman rank correlation coefficient, clearly shows that there is strong positive correlation (ρ ≈ 0.75) between the concentration of heavy metals in the soil obtained from a mining and the control sites respectively. This implies that, as the concentration of the heavy metals increases in soil the more the rate at which plants absorb and store these metals.

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Section: Resultssupporting

confidence: 93%

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2018

RJLBPCS

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“…The non-bioavailability is a symptom of moderate stability of the above metals in the samples. This could be linked to the high organic matter and residual content in the soils which can lead to the formation of insoluble complex compounds which may be limiting the mobility of heavy metals [20]. The bioavailability of Fe, Ni, Pb and Co in sample station ST3 which is an agricultural area was above 50.00 %.…”

Section: Resultsmentioning

confidence: 99%

Preliminary Investigation of Inorganic and Organic Contaminants in Soils within Wukari Metropolis, Taraba State, Nigeria

G.G¹,

B.N²,

A.M³

et al. 2021

Int. Res. J. multidiscip. Technovation

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This study aimed at the preliminary investigation of inorganic and organic contaminants in soils within Wukari metropolis and to assess the contamination status and metal bioavailability. Digested soil samples for total metals and fractionation were analyzed for heavy metal concentrations in triplicates using Flame Atomic Absorption Spectrophotometer while 5 Varian Bond Elu SI SPE cartridges was used for solid phase extraction and the soil sample extracts were analyzed by GC-MS. The percentage bioavailability of metals ranged from Fe: 13.81 – 98.85 %, Ni: 65.01 - 80.93 %, Cr: 34.82 – 77.19 %, Pb: 66.93 - 86.59 % and Co: 70.35 - 99.14 % respectively. The bioavailability of Fe, Ni, Pb and Co station ST3 which is an agricultural area were above 50.00%. This indicates that food crops grown in the area may be contaminated by the metals. Irrespective of sampling points, the distribution of metals in the soil samples generally followed the order Fe: residual > carbonate > exchangeable > oxidizable; Ni: exchangeable > carbonate > oxidizable > residual; Pb: exchangeable > residual > carbonate > oxidizable; Co: exchangeable > carbonate > oxidizable > residual. Organic contaminants such as Halo alkanes; bromodichloromethane (molecular weight 162.0 g/mol) and chloroform (molecular weight 118.0 g/mol) were detected in ST1 while, 1, 1, 2 trichloroethane (molecular weight 132.0 g/mol). Another contaminant phenol d5 was recorded in sample ST2, ST3 and ST4 respectively. BTEX compounds were also contaminants present in ST5 (Fuel station near some automobile workshops).

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“…A significant percentage of Pb was associated with non-residual fractions could be considered as potential available fractions means that Pb is readily available for plant uptakes and bioaccumulation and could be environmental risks (Jimoh et al, 2013). Furthermore, Honglei et al (2008) mentioned that the present of more than 50% of Pb associated with non-residual fraction of unsaturated soil has indicated the influence of anthropogenic activities and Pb has the potential bioavailability.…”

Section: Bioavailability Of Leadmentioning

confidence: 99%

Geochemical Fraction, Mobility And Bioavailability Of Lead In Unsaturated Soil Of Yogyakarta City, Indonesia

et al. 2015

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Lead (Pb) is one of common heavy metals found inthe soil of urban environment. In Yogyakarta City,Indonesia, lead content in the soil was already reported by some researchers, however all of the report were only reveals the distribution of lead concentration in the soil. Therefore, this research paper aims to understand the geochemical fraction leadin the soil of Yogyakarta City and assess the mobility and bioavailability of lead release to the environment. The soil sampling location is selected on Kotagede District, representing the oldest urban area of Yogyakarta city. A shallow bore hole was drill until about 7 m below the surface and soil/sediments weresampled for each 1 m depth started from the surface. Six steps of sequential extraction procedures were carried out to assess the geochemical fraction of Pb for each of soil samples. The sequential extraction shows that the highest amount of Pb in thesoil of Yogyakarta City is found in amorphous ironoxide, crystalline iron oxide and non residual fraction form of Pb. Based on the results of geochemical fraction, the mobility factor of lead can be calculated and reveals low mobility factor range from 0.4 to 3.3%. The mobility of lead is decreased from the surface to the deeper soil, on the other hand the bioavailability of Pb calculated from exchangeable and carbonate fraction is also show low risk of bioavailability. Therefore, it can be concluded that although Pb concentration is high in non-residual fraction, Pb isin low risk condition due to its poor mobility and bioavailability. But, concern on lead contamination should be considered because if the concentration of Pb is enriched over the adsorption capacity of ironoxide, it can easily release to the environment and can impact to human in the future.Keywords: Yogyakarta city, Lead, Sequential extraction, Geochemical fraction

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Sequential Analysis of Metals in Municipal Dumpsite Composts of Kano Metropolis, Nigeria

Cited by 5 publications

References 21 publications

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Preliminary Investigation of Inorganic and Organic Contaminants in Soils within Wukari Metropolis, Taraba State, Nigeria

Geochemical Fraction, Mobility And Bioavailability Of Lead In Unsaturated Soil Of Yogyakarta City, Indonesia

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