Heavy Metal Speciation in Some Selected Farms Treated with Urban Solid Waste, in Jos South, Plateau State, Nigeria

Nimyel, Nanven D.; Egila, J. N.; Lohdip, Y. N.

doi:10.9734/irjpac/2015/14179

Cited by 1 publication

(9 citation statements)

References 25 publications

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“…Three grams (3.0 g) of the sieved soil sample was weight in a Pyrex conical flask and digested with 25 ml of aqua regia (HCl + HNO3, 3:1 v/v) at 120 °C on a water bath in a fume cupboard. The digested sample was cooled and filtered into a 100 ml volumetric flask and made up to the mark with distilled/deionised water [13], [18]. This process was repeated.…”

Section: Analysis Of Heavy Metals In Soilmentioning

confidence: 99%

“…The exchangeable fraction was extracted using 1M BeCl2, (instead of MgCl2), pH7, in stoppered polyethylene bottles at room temperature [13]. To the residue from F1, 10 mL of 1 M BeCl2 was added, and this was agitated for 10 hours on a mechanical shaker.…”

Section: ) Exchangeable Fractions [F2]mentioning

confidence: 99%

“…This fraction was extracted from the residue of [F3] with a mixture of hydroxylamine hydrochloride (NH2OH. HCl) and 0.2M trioxonitrate (V) acid (HNO3) and agitated at room temperature for 1 hour [13].…”

Section: ) Fe /Mn Bound Fraction [F4]mentioning

confidence: 99%

“…From these tables, the results showed that cadmium (Cd) was associated with all the fractions with the exchangeable fraction having 32.12 % and 35.11% at Mangu and Alogwom respectively (Tables III & IV). The predominance of Cd in the mobile fractions (soluble and exchangeable fractions) has been reported [13], [33]. The high percentage of Cd in the mobile fractions (62.78%) poses serious potential threat to the ecosystem and enhance potential bioavailability [14], [34].…”

Section: Speciation Of Heavy Metals At the Mining Sitesmentioning

confidence: 99%

“…They cannot be biodegradable and their residence time in the soil can be thousands of years [12]. The determination of total heavy metal concentrations can only be used to assess heavy metal pollution but cannot be used to assess the mobility and bioavailability of the heavy metals [13], [14]. To determine or assess the toxicity, mobility, reactivity, and bioavailability of heavy metals in the environment, speciation can be an efficient tool to environmentalists [14], [16].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation and Speciation of Heavy Metals Contamination of Selected Artisanal Mining Sites in Mangu Local Government Area of Plateau State, Nigeria

Nimyel¹,

Chundusu²

2021

EJCHEM

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Artisanal (illegal) mining has been reported to have environmental and health effects on the surrounding communities due to heavy metals pollution. The determination of total heavy metal concentration does not reflect the toxicity and bioavailability of the metals. Toxicity and bioavailability of the metals can be achieved by determining the form in which the metal exist in the environment (speciation). This present work evaluated the heavy metals’ {cadmium (Cd), copper (Cu), manganese (Mn), lead (Pb), zinc (Zn) &nickel (Ni)} contamination and the form in which they exist at some mining sites in Mangu LGC, Plateau state, Nigeria. Aqua regia ((HCl + HNO3, 3:1 v/v) was used for total metal concentration while sequential extraction method was used to orderly determine the speciation of the heavy metals. The level of the heavy metals in the digested solutions were determined using Buck Scientific model 210VGP Atomic Absorption Spectrophotometer (AAS). The results divulged that the concentrations of the heavy metals were within the FEPA and WHO recommended permissible limit except Cd and Ni. The values of the metals at Mangu Halle mining site followed the sequence: Mn > Zn > Ni > Pb > Cu > Cd whereas the sequence at Alogwom was Mn > Zn > Pb > Ni > Cu > Cd. The results of the speciation indicated that all metals were bound to the five fractions with the residual fraction dominating except Cd which was bound mostly to the soluble and exchangeable fractions. It could be concluded that the presence of these heavy metals in the mobile fractions, indicate that they could be easily released to the environment from soil. Thus, they are also likely to cause toxicity in the environment. Proper monitoring of the mining activities in the communities was recommended.

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Section: Analysis Of Heavy Metals In Soilmentioning

confidence: 99%

Section: ) Exchangeable Fractions [F2]mentioning

confidence: 99%

Section: ) Fe /Mn Bound Fraction [F4]mentioning

confidence: 99%