Heavy Metals in Bioindicators of the River Niger about the Vicinity of the Ajaokuta Iron and Steel Industry in Kogi State of Nigeria

Omanayi, E.O.; Okpara, C. G.; Nwokedi, G. I. C.

doi:10.3923/rjes.2011.142.149

Cited by 8 publications

(3 citation statements)

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“…Likewise, q max in the present study obtained by ) is very close to that obtained by the Brazilian sample (23.1) (Schneider et al, 1995), while q max obtained by Pardo-model (27.7) is 1.2 times lower than that obtained from the Indian sample (33.4) (Dave et al, 2009). The inconsistency in the values of the q max , b and K f , calculated for Cu 2+ biosorption by the same biomass species from different locations, may be attributed to the variation in their habitat which alter the chemical composition and physical characteristics of the biomass and hence the ability and mechanism of biosorption (Omanayi et al, 2011).…”

Section: Tablecontrasting

confidence: 60%

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Biosorption of Cu2+ by Eichhornia crassipes: Physicochemical characterization, biosorption modeling and mechanism

Komy

Abdelraheem

Ismail

2013

Journal of King Saud University - Science

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This work presents the biosorption potential Eichhornia crassipes biomass, collected from the Nile water, for removing Cu(II) ions. Physicochemical characteristics, proton and Cu 2+ binding constants, and biosorption isotherms were studied. The biomass contains 43.3 mg g À1 protein, 40.76 mg g À1 carbohydrates and 16 types of amino acids. The biomass has large surface area (4.16 m 2 g À1 ) and pore size (35.93 Å ). Proton bindings (pK H1 = 1.8; pK H2 = 1.9; pK H3 = 2.0) and Cu 2+ binding constants (pK M1 = 4.37; pK M2 = 4.24; pK M3 = 3.76) were calculated by Non-Ideal Competitive Absorption (NICA) model. FT-IR results suggested that AOH, ACOOH and AP‚O sites are mainly responsible for Cu 2+ biosorption. Biosorption isotherms were successfully fitted by two Langmuir linearization models. The biosorption mechanism includes ionization and complexation stages. The biomass shows a breakthrough ability for Cu 2+ biosorption (q max = 27.7 mg g À1 ) and at pH 4.5.

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Section: Tablecontrasting

confidence: 60%

“…According to EDAX analysis result, Table 1, shows that the biomass contains a natural amount of Cu representing 0.7% of its dry weight and it should be absorbed during the plant's life (Omanayi et al, 2011). This quite higher value of naturally adsorbed Cu might corresponds to the high contamination of Nile water with Cu 2+ .…”

Section: Resultsmentioning

confidence: 98%

Biosorption of Cu2+ by Eichhornia crassipes: Physicochemical characterization, biosorption modeling and mechanism

Komy

Abdelraheem

Ismail

2013

Journal of King Saud University - Science

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“…The elements that are of concern include lead, mercury, cadmium, arsenic, chromium, zinc, nickel and copper. (Omanayi et al,2011) Heavy metals are dangerous because they tend to bioaccumulate in living things any time they are taken up and stored faster than they are broken or excreted. (Abulude et al,2007) Of the major heavy metals, cadmium is a major industrial pollutant particularly in areas associated with smelting of zinc and heavy road traffic (Das et al,1997).Heavy metal uptake by plants grown in polluted soils has been studied to a considerable extent .…”

Section: Introductionmentioning

confidence: 99%

Studies on the Impact of cadmium on Growth, Yield Attributes, Yield and Biochemistry of Mung Bean (Vigna radiata L Wilczek) Under Natural Field Condition, Burdwan, West Bengal

2016

Sci. Agric

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Vigna radiata L. Wilczek is a staple food crop in terms of its high protein value. In our study we investigated in realistic field conditions the effect of six different concentration of cadmium (0,0.05,0.5,1,,10 and 20mM) on various growth attributes (root length, shoot length), yield attributes(pod length and diameter, number of grains per pod) , biochemical constituents (total chlorophyll, sugar, protein, leg hemoglobin, relative water content, leaf pH) and scanning electron microscope(SEM) study of different parts of Vigna radiata L Wilczek . A higher dose of cadmium produced 61.87% of reduction in yield . The cadmium treatment imparted its negative impact on chlorophyll , protein, leg haemoglobin and relative water content while an increment was induced for sugar and leaf pH . The SEM observation revealed gradual distortion of structural arrangement of tissues of root and shoot and reduction in the stomatal frequency. This study clearly indicates that cadmium showed toxic effects at higher concentrations of 20mM but promotery at lower concentrations of 0.05mM with reference to growth , yield and biochemical set up of crop plant.

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Ecological risk assessment of heavy metals and polycyclic aromatic hydrocarbons in sediments of rivers Niger and Benue confluence, Lokoja, Central Nigeria

Ekere

Monday

Ihedioha

2017

Environ Sci Pollut Res

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The concentrations of six heavy metals (HMs) and 16 US EPA priority polycyclic aromatic hydrocarbons (PAHs) in sediment samples of the confluence of rivers Niger and Benue were investigated. The ecological risk assessment of the contaminants was carried out. The results showed that the sediment samples were heavily polluted with iron and moderately polluted with Cd while other metals posed no pollution problem when compared with USEPA sediment quality guidelines. Only six out of the 16 priority PAHs were detected in the samples, and source apportionment of the PAHs indicated that they are of pyrogenic origin. The ∑PAHs in the samples were lower than many of similar studies and were of no pollution risk. The ecological risk assessment result of the heavy metals showed that the sediments were of considerable risk due majorly to Cd levels. The HM concentration results statistically showed significant difference between seasons at probability value (P < .05). Data analysis by PCA classified the metals into three different components according to sources. The levels of HMS and PAHs detected in the sediments were correlated for source identification, and the correlation showed that the majority of the pollutants were mainly from anthropogenic sources. There is increasing level of anthropogenic activities at the vicinity of the confluence due to urbanization which may call for periodic monitoring of the sediment quality.

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Heavy Metals in Bioindicators of the River Niger about the Vicinity of the Ajaokuta Iron and Steel Industry in Kogi State of Nigeria

Cited by 8 publications

References 1 publication

Biosorption of Cu2+ by Eichhornia crassipes: Physicochemical characterization, biosorption modeling and mechanism

Biosorption of Cu2+ by Eichhornia crassipes: Physicochemical characterization, biosorption modeling and mechanism

Studies on the Impact of cadmium on Growth, Yield Attributes, Yield and Biochemistry of Mung Bean (Vigna radiata L Wilczek) Under Natural Field Condition, Burdwan, West Bengal

Ecological risk assessment of heavy metals and polycyclic aromatic hydrocarbons in sediments of rivers Niger and Benue confluence, Lokoja, Central Nigeria

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