Chemical fractionation and mobility of nickel in soils in relation to parent materials

Okoli, N.H.; Uzoho, B.U.; Ahukaemere, C. M.; Egboka, Nzube; Irokwe, I.F.

doi:10.1080/03650340.2020.1776265

Cited by 7 publications

(2 citation statements)

References 27 publications

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“…Badawy et al (2022) [10] reported the total Ni content in Egyptian soils ranged from 14.2 to 48.3 mg kg -1 with an average of 31.4±8.02 mg kg -1 in the surface layers and from 9.5 to 45.5 mg kg -1 with an average of 27.5±7.15 mg kg -1 in the subsurface layers. Okoli et al (2020) [73] and Wang et al…”

Section: Nickel In Soilsmentioning

confidence: 97%

Nickel availability, deficiency and toxicity in soils and plants: A review

Kumar

2023

Int. J. Appl. Res.

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Nickel plays many important roles in the growth and development of plants. Its deficiency or toxicity symptoms can occur when it is present in too little or too much amount, respectively. Its status in soils is highly dependent on the nickel concentration of the parent rocks, but in surface soils, its content depends on soil-forming processes. Total Ni content in soils varied widely from 3.0 to 1000 mg kg -1 and depends on the soil types. Total Ni content in soil positively correlates with the clay and organic matter content and negatively correlates with the fine sand content. Although it is present in various forms in soils, the most readily available form to plants is the Ni -2+ ion. The availability of Ni depends on several physicochemical properties of soils. The magnitude of available Ni was reported to be higher in the lowlands than in the uplands. Its availability is greater in surface soils than in subsurface soils. High concentrations of Ni in plants adversely affect their growth and development. The toxicity levels of Ni vary widely and depend on plant species.

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Section: Nickel In Soilsmentioning

confidence: 97%

Nickel availability, deficiency and toxicity in soils and plants: A review

Kumar

2023

Int. J. Appl. Res.

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“…Mehes-Smith, (2013) also reported that the total amount of Cu, Ni, Fe, Mg and Zn were significantly higher in the soil top horizon. However, Okoli et al (2020) reported that the Ni mobility factor in the soils was high and was in the following order of abundance; Falsebedded sandstones > alluvium> Imo clay shale > coastal plain sands. Boszke et al (2008) reported that the surface layer of soil (0-20cm) was characterized by higher mercury concentrations than that of the subsurface soil (60-80cm) contradicting results of this study where higher mercury concentrations were obtained in the 30-60 cm soil depth.…”

Section: Heavy Metal Levelsmentioning

confidence: 99%

Heavy Metals Levels and Contamination Status in Soils of Koudalwa, Tchad

Dahaina,

Tsamo,

Mianpeureum

et al. 2024

IRA-JAS

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This study is aimed at determining the heavy metal levels in agricultural soils and around oil drilling pits in Koudalwa, Tchad and evaluating pollution levels. Soil sampling was done on three sites AA (AA1 & AA2), BB (BB1 & BB2), CC (CC1 & CC2) with two samples collected per site, giving a total of six samples. The subsamples with code one represent the 0-30 cm depth and code two represent the 30-60 cm depth. A control sample was taken far from sites having any oil activities. 2 mm sieved soil samples were digested in a mixture of HCl and HNO<sub>3</sub> in the ratio 1:3 and the concentrations of Cr, Cd, Pb, Hg, Cu, Mn, Fe and Ni in the digested solutions determined by atomic absorption spectroscopy. The contamination level of the heavy metals was assessed using the Geo-Accumulation Index (Igeo), Contamination factor, Pollution load index (PLI), Enrichment Factor (EF), and Potential Ecological Risk Assessment (PER) models. Results obtained shows that the abundance of heavy metals in the soils of Koudalwa is in the order; Cu ˃ Hg ˃ Cr ˃ Mn ˃ Fe ˃ Cd ˃ Ni ˃ Pb. The site AA shows the highest levels of all the determined heavy metals except Ni with highest amount of Cr (197.98 mg/kg), Cd (6.49 mg/kg), Hg (531.46 mg/kg), Ni (0.088 mg/kg) in the 30-60 cm soil depth, and Pb (0.021 mg/kg), Cu (815.24 mg/kg), Mn (166.55 mg/kg) and Fe (60.04 mg/kg) in the top soil, 0-30 cm depth. PLI analysis confirms that sites AA1 and AA2 present a decline of site quality as compared to other sites which are of perfect site quality. ER values for Cd, Cr, Cu, Hg showed severe enrichment due to contributions of anthropogenic sources with higher values in subsurface samples, thus indicating their high mobility in these soils. Results of this study shows that critical attention must be given to site AA as well as other activities in other sites that can contaminate the soils with special focus on remediation measures and sensitization of the population on the dangers of different activities on the soils.

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