Sorption of Heavy Metals on Clay Minerals and Oxides: A Review

Ugwu, Ifeoma Mary; Igbokwe, Onyedikachi Anthony

doi:10.5772/intechopen.80989

Cited by 33 publications

(20 citation statements)

References 104 publications

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“…The binding and mobility of Cr ions in the environment depend on the type of minerals and organic matter that create the soil, river suspension and sediments (Kyziol, Twardowska & Schmitt-Kopplin, 2006;Merdy, Gharbi & Lucas, 2009;Kyziol-Komosinska et al, 2010;Dos Anjos et al, 2014). The most effective minerals in metal uptake are secondary minerals, such as clay minerals (kaolinite, montmorillonite, illite) and iron (oxyhydr)oxides (ferrihydrite, goethite), forming during the weathering of primary minerals (Ugwu & Igbokwe, 2019). The ubiquity and abundance of iron oxides in the subsurface highlight their important roles in influencing the fate and transport of heavy metals (Wang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Adsorption and bonding strength of chromium species by ferrihydrite from acidic aqueous solutions

Dzieniszewska

Kyzioł-Komosińska

Pająk

2020

PeerJ

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The adsorption behavior of Cr(III) and Cr(VI) ions onto laboratory-synthesized 2-line ferrihydrite was investigated under a batch method as a function of initial chromium concentration (0.1–1000 mg L−1) and pH (3.0 and 5.0). Moreover, the effect of the type of anion (chloride and sulfate) on Cr(III) adsorption was studied. The affinity of Cr(III) ions for the ferrihydrite surface depended on both the type of anion and pH of the solution and the maximum adsorption capacities decreased as follows: q (SO42−, pH 5.0) > q (SO42−, pH 3.0) > q (Cl−, pH 5.0) > q (Cl−, pH 3.0), and were found to be 86.06 mg g−1, 83.59 mg g−1, 61.51 mg g−1 and 40.67 mg g−1, respectively. Cr(VI) ions were bound to ferrihydrite in higher amounts then Cr(III) ions and the maximum adsorption capacity increased as the pH of the solution decreased and was 53.14 mg g−1 at pH 5.0 and 83.73 mg g−1 at pH 3.0. The adsorption process of Cr species was pH dependent, and the ions were bound to the surface of ferrihydrite by surface complexation. The Sips isotherm was the best-fit model to the results obtained from among the four isotherm models used, i.e., Freundlich, Langmuir, Dubinin-Radushkevich and Sips, indicating different adsorption centers participate in Cr uptake. In order to assess the bonding strength of the adsorbed chromium ions the modified BCR procedure, dedicated to the samples with a high iron content, was used. The results of the sequential extraction showed that Cr(III) ions were bound mainly in the immobile residual fraction and Cr(VI) ions were bound in the reducible fraction. The presence of Fe (oxyhydr)oxides in soil and sediments increases their adsorption capacity for Cr, in particular for hexavalent Cr in an acid environment due to their properties (high pHPZC).

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Section: Introductionmentioning

confidence: 99%

Adsorption and bonding strength of chromium species by ferrihydrite from acidic aqueous solutions

Dzieniszewska

Kyzioł-Komosińska

Pająk

2020

PeerJ

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“…A self-cleaning capacity of unregulated river can be many times greater than that of a regulated river. The intensity of hydrochemical processes such as oxidation and mineralization depends on the presence of clays, silts, colloidal particles, and Mn and Fe oxides and hydroxides in water and sediments (Ugwu and Igbokwe 2019;Vagnetti et al 2003) and coexist with physical processes such as adsorption, dilution, and sedimentation. For area C, all these processes could be responsible for the down-river decrease of the concentration of magnetic particles, resulting in the decrease of the magnetic susceptibility in sediments.…”

Section: Discussionmentioning

confidence: 99%

Assessment of heavy metal pollution in Vistula river (Poland) sediments by using magnetic methods

Szczepaniak-Wnuk

Górka-Kostrubiec

Dytłow

et al. 2020

Environ Sci Pollut Res

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The present study evaluated the level of heavy metal (HM) pollution in Vistula river sediments in a highly urbanized Warsaw agglomeration (Poland). Magnetometry was used to assess the pollution level by measuring the fine fractions (0.071 mm and < 0.071 mm) of sediments collected from the surface layer of the riverbank. The magnetic methods (e.g., mass magnetic susceptibility χ, temperature-dependence magnetic susceptibility, and hysteresis loop parameters) were supplemented by microscopy observations and chemical element analyses. The results showed the local impact of Warsaw's activity on the level of HM pollution, indicated by the maximum concentrations of magnetic particles and HM in the city center. The sediment fraction < 0.071 mm was dominated by magnetite and by a large amount of spherical-shaped anthropogenic magnetic particles. The pollution from the center of Warsaw was transported down-river over a relatively short distance of approximately 11 km. There was a gradual decrease in the concentrations of magnetic particles and HM in areas located to the north of the city center (down-river); furthermore, χ and concentrations of HM did not decrease to the values observed for the area to the south of Warsaw (up-river). The study showed two possible sources of sediment pollution: traffic-related and heat and power plant emissions. The influence of an additional source of pollution cannot be excluded as the amount of spherules in the sediments at the center was extremely high. The present study demonstrates that magnetometry has a practical application in detecting and mapping HM pollution in river systems.

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“…Chelating polymers are able to interact with Cu ions, thanks to their hydroxyl and amine groups, which are reactive to Cu ions (Koneswaran and Narayanaswamy 2009;Ngah and Fatinathan 2008). Metal oxides have high surface area, reactive sites and are able to adsorb toxic metals (Ugwu and Igbokwe 2019).…”

Section: F-em Sensorsmentioning

confidence: 99%

Functionalised microwave sensors for real-time monitoring of copper and zinc concentration in mining-impacted water

Frau

Wylie

Byrne

et al. 2019

Int. J. Environ. Sci. Technol.

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Microwave spectroscopy has been identified as a novel and inexpensive method for the monitoring of water pollutants. Integrating microwave sensors with developed coatings is a novel strategy to make the sensing system more specific for a target contaminant. This study describes the determination of copper and zinc concentration in water in both laboratory-prepared and acquired mine water samples from two abandoned mining areas in Wales, UK. Uncoated sensors immersed in samples spiked with 1.25 mg/L concentrations of copper and zinc, using the standard addition method, were able to quantify the concentration at 0.44 GHz with a strong linear correlation (R2 = 0.99) for the reflection coefficient magnitude (|S11|). Functionalised microwave sensors with l-cysteine, chitosan and bismuth zinc cobalt oxide-based coatings have shown improvement in the sensing performance. Specifically, the linear correlation at 0.91–1.00 GHz between |S11| and a polluted water sample spiked with Cu showed a higher (R2 = 0.98), sensitivity (1.65 ΔdB/mg/L) and quality factor (135) compared with uncoated sensors (R2 = 0.88, sensitivity of 0.82 ΔdB/mg/L and Q-factor 30.7). A Lorentzian peak fitting function was applied for performing advanced multiple peak analysis and identifying the changes in the resonant frequency peaks which are related to the change in metal ion content. This novel sensor platform offers the possibility of in situ monitoring of toxic metal concentrations in mining-impacted water, and multiple peak features, such as area, full width half maximum, centre and height of the peaks, have the possibility to offer higher specificity for similar toxic metals, as between copper and zinc ions.

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Sorption of Heavy Metals on Clay Minerals and Oxides: A Review

Abstract: Sorption of heavy metals plays a vital role in controlling environmental pollution. Here, we reviewed the sorption of heavy metals such as Ni,

Cited by 33 publications

References 104 publications

Adsorption and bonding strength of chromium species by ferrihydrite from acidic aqueous solutions

Adsorption and bonding strength of chromium species by ferrihydrite from acidic aqueous solutions

Assessment of heavy metal pollution in Vistula river (Poland) sediments by using magnetic methods

Functionalised microwave sensors for real-time monitoring of copper and zinc concentration in mining-impacted water

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