Mobility of Cr, Pb, Cd, Cu and Zn in a loamy sand soil: A comparative study

Fonseca, Bruna; Figueiredo, Hugo; Rodrigues, Joana Lúcia Lima Correia; Queiroz, Ana; Tavares, Teresa

doi:10.1016/j.geoderma.2011.06.016

Cited by 74 publications

(29 citation statements)

References 42 publications

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“…Pb has the largest binding energy among the three heavy metals (Pb, Cu, and Cd) by both of the methods. However, for Cu and Cd, the binding energy of Cd is larger than that of Cu, measured by Wien effect method, in accordance with results of adsorption experiment and leaching experiment (Sun et al 2001;Sauvé et al 2003;Fonseca et al 2011). In contrary, the binding energy of Cu is larger than that of Cd, measured by ISE, being consistent with those articles (Gao et al 1997;Gu and Evans 2008;Usman 2008;Lu and Xu 2009).…”

Section: Mean Gibbs Free Binding Energies Of Ion Activity Methods and supporting

confidence: 86%

Comparison between ion activity method and suspension Wien effect method in determining binding energy of divalent cations to soil particles

Fan

Wang

et al. 2015

J Soils Sediments

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Purpose The binding energy of ions on soils is one of the most important parameters to quantify the sorption strength of ions on soils. The aim of this study was to determine the mean free binding energies of four divalent cations Ca 2+ , Cd 2+ , Cu 2+ , and Pb 2+ in suspensions of yellow-brown soil and black soils clay particles through ion activity and Wien effect methods, respectively, and to justify which method will be positive. Materials and methods The homoionic suspensions of yellow-brown soil (YB) and two black soils (BS I , BS II ), which were saturated with divalent cations Ca 2+ , Cd 2+ , Cu 2+ , and Pb 2+ , were allowed to stand for 7 to 10 days and to achieve sufficient equilibration of ion reactions in the suspensions. The same sample was used to prepare two suspensions: one for the Wien effect measurement and another for the ion activity measurement, and the binding energies of divalent cations on yellow-brown soil and black soils that were determined by the two methods were calculated and compared. Results and discussion The mean Gibbs free binding energies values (ΔG bi ) of Ca 2+ , Cu 2+ , and Pb 2+ on YB and BS I determined by ion activity method are obviously greater than ones by Wien effect method. The ΔG bi values (I) of Cd 2+ , Cu 2+ , and Pb 2+ to subsamples of black soil II determined by ion activity method are also larger than ones (II) by Wien effect method, the values (I) of the three cations for top black soil II were in the order Pb (14 kJ mol −1 )>Cu (9 kJ mol −1 )>Cd (7 kJ mol −1 ), and the values for bottom black soil II and OMfree black soil II were in the order Pb (14-16 kJ mol −1 )>Cu (11-13 kJ mol −1 )≈Cd (11-13 kJ mol −1 ). The ratios (I/II) of ΔG bi are in the range of 1.3-2.4 except the suspensions of Cdtop black soil II in which I/II value is equal to about 1. Conclusions The mean Gibbs free binding energies between divalent cations and soil particles determined by ion activity method were larger than those determined by Wien effect method. The Wien effect method supported by the results acquired from atom absorption spectrum is the better method to determine the binding energies of divalent cations to soil particles because the activities of divalent cations in suspensions determined by ion activity method were underestimated.

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Section: Mean Gibbs Free Binding Energies Of Ion Activity Methods and supporting

confidence: 86%

Comparison between ion activity method and suspension Wien effect method in determining binding energy of divalent cations to soil particles

Fan

Wang

et al. 2015

J Soils Sediments

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“…According to Bradl (2004), ion exchange prefers cations with low a pK h , thus Cr 3+ with the lowest pK h value sorbed more than other metal ions. The same sorption trend was reported by Merdy, Gharbi, andLucas (2009) andFonseca, Figueiredo, Rodrigues, Queiroz, andTavares (2011) with the former attributing the trend to the conventional hard-soft-acid-base (HSAB) principle. The hard ions are those with low polarizability and small ionic size and prefer hard ligands and form weak complexes with them.…”

Section: Langmuir Modelsupporting

confidence: 79%

Sorption of Heavy Metals by Ferralic-Arenosol and Vertic-Luvisol: A Comparative Isothermal Study

Mosekiemang¹,

Dikinya²,

Toteng³

2014

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Modeling of sorption data is essential for characterizing retention of heavy metals by the soil matrices as well as to predict the fate of heavy metals in the environment. We carried out a study to evaluate adsorption characteristics of metallic ions (Cr 3+ , Pb 2+ and Cu 2+ ) as sole sorbates as well as in coexistence onto clay extracts of Vertic-Luvisol and Ferralic-Arenosol, the generally under-researched yet wide-spread semi-arid soils. Additionally, sorption kinetics of these heavy metals was evaluated in these soils. Equilibrium sorption data for both non-competitive and competitive metal systems were found to obey the Langmuir isotherm. Overall metal loading capacity was higher in Vertic-Luvisol than Ferralic-Arenosol whereas metal-wise affinity to binding sites favoured sorption of Cr 3+ over Pb 2+ and Cu 2+ in that order. Contrary to the hypothesis of this study, the preferential sorption process was found to be driven by cationic properties as opposed to soil properties. Adsorption of metallic ions onto soils was significantly reduced in competitive systems than non-competitive systems, a phenomenon attributable to the antagonistic effects of coexisting species. Cr 3+ suppressed sorption of Pb 2+ and Cu 2+ on both soils as validated by the competitive adsorption capacity ratios which were < 1 in all instances where Cr 3+ coexisted with either one of Pb 2+ or Cu 2+ . The adsorption kinetics of metal ions in both soils followed the pseudo-second-order rate law, suggesting chemical sorption as the rate-limiting step of the adsorption process.

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“…Carbón activado a partir de Escherichia coli y carbón activado a partir de Arthrobacter viscous [65], [66] Carbón activado a partir de cáscara de naranja [67] Carbón activado a partir de cáscara de coco [68] Modificación Químicas Biomasa reticulada con glutaraldehído [69], [70] Biomasa reticulada con cloruro de calcio [70], [71] Biomasa modificada con ácido cítrico [72], [73] Otros materiales Arena [74] Zeolita [75], [76] Cenizas volantes [77] En la Tabla 6, se establecen algunas ventajas y desventajas que presentan las biomasas vivas y muertas en el proceso de adsorción de metales pesados [27], [29], [78].…”

Section: Organismos Vivosunclassified

Adsorción de metales pesados en aguas residuales usando materiales de origen biológico

Tejada-Tovar

Garcés-Jaraba

2015

TecnoL.

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Adsorción de metales pesados en aguas residuales usando materiales de origen biológicoAdsorption of heavy metals in waste water using biological materialsCandelaria Tejada-Tovar 1 , Ángel Villabona-Ortiz 2 y Luz Garcés-Jaraba 3Recibido: 10 de junio de 2014, Aceptado: 26 de octubre de 2014Cómo citar / How to cite C. Tejada-Tovar, A. Villabona-Ortiz y L. Garcés-Jaraba, "Adsorción de metales pesados en aguas residuales usando materiales de origen biológico", Tecno Lógicas, vol. 18, no. 34, pp. 109-123, 2015 ResumenLa bioadsorción es un proceso que permite la captación activa o pasiva de iones metálicos, debido a la propiedad que diversas biomasas vivas o muertas poseen para enlazar y acumular este tipo de contaminantes por diferentes mecanismos. La aplicación de materiales de bajo costo obtenidos a partir de diferentes biomasas provenientes de la flora microbiana, algas y residuos agroindustriales ha sido investigada para reemplazar el uso de métodos convencionales en la remoción de contaminantes, tales como los metales pesados. Entre los metales de mayor impacto al ambiente por su alta toxicidad y difícil eliminación se encuentran el cromo, níquel, cadmio, plomo y mercurio. En el presente trabajo se estudian las generalidades de la adsorción como proceso alternativo para la remoción de contaminantes en solución y las biomasas comúnmente usadas en estos procesos, además de algunas de las modificaciones realizadas para la mejora de la eficiencia de adsorción de las mismas. Se concluye que el uso de la adsorción en la remoción de contaminantes en solución acuosa mediante el uso de biomasa residual es aplicable a estos procesos de descontaminación evitando problemas subsecuentes como la generación de lodos químicos, y generando un uso alternativo a materiales considerados como desechos. Se identifica además que factores como el pH de la solución, tamaño de partícula, temperatura y la concentración del metal influyen en el proceso. Palabras claveAdsorción, biosorbentes, efluentes, ion metálico, residual. AbstractBiosorption is a process that allows active or passive uptake of metal ions due to the property that different living or dead biomass have to bind and accumulate these pollutants by different mechanisms. The application of low-cost materials obtained from different biomass from microbial flora, agro-industrial waste and algae has been investigated to replace the use of conventional methods for the removal of contaminants such as heavy metals. Some of the metals of greatest impact to the environment due to its high toxicity and difficult to remove are chromium, nickel, cadmium, lead, and mercury. In this paper, an overview of adsorption as an alternative process for the removal of contaminants in solution and biomass commonly used in these processes, as well as some of the modifications made to improve the efficiency of adsorption of these materials is presented. It was concluded that the use of adsorption in the removal of pollutants in aqueous solution using waste biomass is applicable to these decontaminatio...

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Mobility of Cr, Pb, Cd, Cu and Zn in a loamy sand soil: A comparative study

Cited by 74 publications

References 42 publications

Comparison between ion activity method and suspension Wien effect method in determining binding energy of divalent cations to soil particles

Comparison between ion activity method and suspension Wien effect method in determining binding energy of divalent cations to soil particles

Sorption of Heavy Metals by Ferralic-Arenosol and Vertic-Luvisol: A Comparative Isothermal Study

Adsorción de metales pesados en aguas residuales usando materiales de origen biológico

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