Adsorption of Hexavalent Chromium using Natural Goethite: Isotherm, Thermodynamic and Kinetic Study

Kar, Swapnasarit; Equeenuddin, Sk. Md.

doi:10.1007/s12594-019-1175-z

Cited by 25 publications

(14 citation statements)

References 59 publications

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“…The decrease in R L with an increase in the pH indicated that the adsorption was more favorable at higher pH for the Fh-Cr(III) systems and at lower pH for Cr(VI). The values of the parameter R L less than 1 were also obtained by Kar & Equeenuddin (2019) studying the adsorption behavior of Cr(VI) using natural goethite, and Bhattacharya et al (2008) investigating the adsorption of Cr(VI) onto activated alumina.…”

Section: Isotherm Data Analysismentioning

confidence: 98%

“…As ferrihydrite is an effective barrier to the migration of heavy metal ions in soils and aqueous systems, it can be a potential adsorbent for pollutants uptake in the pH range of most natural waters (Ajouyed et al, 2010). Among the available adsorbents, natural and synthetic iron oxides and (oxyhydr)oxides (Asgari et al, 2008;Campos, 2009;Ajouyed et al, 2010;Adegoke et al, 2014;Shahriari et al, 2014;Kar & Equeenuddin, 2019), including ferrihydrite (Zachara et al, 1987;Tzou, Wang & Loeppert, 2003;Zhu et al, 2010;Pieczara & Rzepa, 2016), were examined for Cr removal.…”

Section: Introductionmentioning

confidence: 99%

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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: Isotherm Data Analysismentioning

confidence: 98%

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 sorption isotherms were studied at 23 °C under the conditions mentioned in Sect. 2.3 by varying the initial concentration of Cr(VI) in the aqueous solution (0.25; 0.5; 1 and 1.5 mmol L −1 ) at a fixed equilibrium time of 8 h. All experimental data were fit to linear forms of the Langmuir, Freundlich and Temkin isotherm models (Table 1) [31,33].…”

Section: Sorption Isotherm Studiesmentioning

confidence: 99%

“…The Langmuir isotherm considers that the sorption process occurs with the following: (a) formation of a monolayer on the biosorbent surface of; (b) no interaction between molecules adsorbed on neighbouring locations; and (c) all the sites are identical and energetically equivalent [31,33,68]. The chemisorption is usually explained as this single-layer process.…”

Section: Standardised Effectsmentioning

confidence: 99%

Sherry wine industry by-product as potential biosorbent for the removal of Cr(VI) from aqueous medium

Sánchez-Ponce

Granado-Castro

Casanueva-Marenco

et al. 2021

Biomass Conv. Bioref.

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A low-cost biosorbent obtained from the Palomino Fino grape seed, a Sherry wine industry by-product, has been proposed as a way of valorising this material. The biomass was characterised obtaining values of 0.68 ± 0.05 g mL−1 for bulk density, 1.02 ± 0.09 g mL−1 for apparent density and 33.3% for porosity. The pHpzc was 5.2 and the surface negative charge value was 2.4 ± 0.2 mmol g−1. The analysis of surface morphology showed differences due to the sorption. The results showed a promising potential for chromium(VI) removal from aqueous solutions. The studies were carried out in batch scale and a 23 factorial design was applied for the optimisation of the process. A percentage of 91.7 ± 0.6% was achieved for the biosorption of Cr(VI) under optimal conditions using pH 5.5, 15 g/L of biosorbent and 8 h of contact time. The biosorption capacity showed a remarkable linearity from 0 to 2 mmol L−1 Cr(VI) and a precision of 0.64% for the removal of 1 mmol L−1 of metal. Langmuir, Freundlich and Temkin isotherm equations and the parameters of six kinetic models were used in the equilibrium modelling and identifying the mechanism of the biosorption. The combination of physical and chemical sorption mechanisms was proposed for the chromium removal with a high maximum sorption capacity (qmax = 208.3 mg g−1). Thermodynamic parameters indicated the spontaneous and endothermic nature of the chromium removal. The successful biosorption was based on the special grape seed components with a relevant content in antioxidant and lignocellulosic compounds.

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“…For this reason, it is said that there is an energetically heterogeneous distribution of the available active sites for the adsorption of the metal [39][40][41][42]. On the other hand, the value of Freundlich's constant n is in the range 1-10 for Hg (II).…”

Section: Kinetics and Adsorption Isothermsmentioning

confidence: 99%

Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes)

Tobar

Astudillo

Correa³

et al. 2020

Biotecnol. sector agropecuario agroind.

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The existence of water hyacinth proliferation in wetlands of the Canal del Dique (Department of Bolívar, Colombia) causes environmental problems because there is no final disposal of these. Therefore, it is necessary to study alternatives for its use. The objective of the study was to evaluate the behavior of the aquatic hyacinth as an adsorbent of Cr (VI) (VI) and Hg (II) (II) in a synthetically prepared solution. The lignocellulosic material was dried at 80°C for 24 h to remove moisture; then crushed and sieved with meshes of different particle sizes; characterized by elemental analysis to check for the presence of cellulose, hemicellulose, and lignin, as well as by Fourier Transform Infrared Spectrometry to verify the existence of functional groups responsible for the adsorption process. It was found that the best particle size was 1 mm, with a removal percentage of 73,4 and 79,3% for Cr (VI) and Hg (II), respectively. When establishing the adsorption kinetics, it was verified that the elimination percentage increases with time up to 5,5 h of contact with the Hg (II) solution and 3,8 h with the Cr (VI) solution.

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Adsorption of Hexavalent Chromium using Natural Goethite: Isotherm, Thermodynamic and Kinetic Study

Cited by 25 publications

References 59 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

Sherry wine industry by-product as potential biosorbent for the removal of Cr(VI) from aqueous medium

Adsorción de cromo (VI) y mercurio (II) en solución utilizando jacinto (Eichhornia crassipes)

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