Chromate adsorption on selected soil minerals: Surface complexation modeling coupled with spectroscopic investigation

Veselská, Veronika; Fajgаr, Radek; Číhalová, Sylva; Bolanz, Ralph M.; Göttlicher, Jörg; Steininger, Ralph; Siddique, Jamal Akhter; Komárek, Michael

doi:10.1016/j.jhazmat.2016.07.002

Cited by 57 publications

(17 citation statements)

References 72 publications

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“…S2). Previous studies have shown that chromate binding onto ferrihydrite and other iron (oxyhydr)oxides occurs with the formation of a monodentate and bidentate inner-sphere complexes (Fendorf et al, 1997;Veselská et al, 2016) and outer-sphere complexes (Zachara et al, 1987). Their proportion in ions binding is dependent on the parameters such as the pH, surface coverage, ionic strength and presence of Al in the structure.…”

Section: Adsorption Of Cr(vi) Ions Onto Ferrihydritementioning

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: Adsorption Of Cr(vi) Ions Onto Ferrihydritementioning

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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“…As a result, the surface potential is continuously reduced by the distance from the surface until it is zero in the liquid phase. In fact, prototype reactions dominate the balance between solid and liquid phases, making protons effective in determining surface potential 54 – 61 .…”

Section: Methodsmentioning

confidence: 99%

Chromium removal from tannery wastewaters with a strong cation exchange resin and species analysis of chromium by MINEQL+

Kocaoba

Çetin

Akçin

2022

Sci Rep

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Chromium (III) salts are highly applied for tanning purpose in tannery industries. The purpose of this study was removal and recovery of chromium(III) from tannery wastewater with a strong cation exchange resin. For this purpose, Amberlite 252 ZU was chosen as a strong cation exchange resin. In the first part of this study, The MINEQL+ computer program was applied depending on the optimum concentration and pH for determining Cr species in aqueous solutions. The second part of the work consists of measuring the exchange equilibrium of H+ ions and Cr(III) ions. Therefore, solutions containing fixed amounts of chromium were brought into contact with different amounts of resins. The evaluation of the obtained equilibrium parameters was done by surface complexing theory. Retention and regeneration steps were successfully performed in the column without any significant change up to 10 cycles. Efficiency was between 90 and 98% in removal studies, and between 81 and 92% in recovery studies. The results showed that a strong cation exchange resin Amberlite 252 ZU can be successfully used for chromium removal and recovery.

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“…Clay minerals are layered aluminosilicates that are ubiquitous in soils and sediments, making them an important component of ancient sedimentary rocks. − The fine-grain size of clay minerals enables them high chemical reactivity, and as a consequence, they exert a considerable impact on global trace element cycling (e.g., refs − ). However, one aspect of clay reactivity that has received less attention is changes in the surface reactivity during variations in solution pH.…”

Section: Introductionmentioning

confidence: 99%

Effect of Acidic Conditions on Surface Properties and Metal Binding Capacity of Clay Minerals

Hao

Pudasainee

Gupta

et al. 2019

ACS Earth Space Chem.

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Clays are one of the most abundant minerals on the Earth's surface, and they play a significant role in global trace element cycling because of their ability to adsorb and incorporate a range of metal cations. However, to what extent clay surface reactivities are affected by changes in pH of the surrounding environment remains poorly understood. To address this uncertainty, we investigated three common clay minerals (kaolinite, illite, and montmorillonite) and compared their surface properties and metal binding capacity prior to and after acidic treatment (pH ranges from 0 to 7). We report that (1) the morphologies and crystal structures of the three studied clay minerals do not differ markedly after exposure to an acidic solution, (2) all three clays display increases in surface area after the pH 0 acidic treatment, and (3) cadmium adsorption to all three clays decreased after the pH 0 acidic treatment. Our results suggest that the variation in metal adsorption capacity is related to acidic modification of clay surface properties. Importantly, this work shows the relevance of acidic environments on surface-controlled reactions of trace metals to clay minerals.

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Chromate adsorption on selected soil minerals: Surface complexation modeling coupled with spectroscopic investigation

Cited by 57 publications

References 72 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

Chromium removal from tannery wastewaters with a strong cation exchange resin and species analysis of chromium by MINEQL+

Effect of Acidic Conditions on Surface Properties and Metal Binding Capacity of Clay Minerals

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