Biosorption of binary mixtures of Cr(III) and Cu(II) ions by Sargassum sp

Silva, Edson Antônio da; Cossich, Eneida Sala; Tavares, Célia Granhen; Filho, Lúcio Cardozo; Guirardello, Reginaldo

doi:10.1590/s0104-66322003000300002

Cited by 29 publications

(15 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…biomass exhibited a greater affinitiy for the Cr(III) ion relative to the Cu(II) ion. This result is in agreement with the results obtained by Silva et al (2003), where the removal of Cr(III) and Cu(II) ions in a batch system was investigated. Silva et al (2002) also investigated the removal of Cu(II) ions by Sargassum sp.…”

Section: Resultssupporting

confidence: 92%

Biosorption of Chromium(III) and Copper(II) Ions onto Marine Alga Sargassum sp. in a Fixed-bed Column

Silva

Vaz

Veit

et al. 2010

Adsorption Science & Technology

Self Cite

View full text Add to dashboard Cite

ABSTRACT:The simultaneous biosorption of chromium(III) and copper(II) ions onto Sargassum sp. alga in a fixed-bed column reactor was investigated. Experiments were undertaken to determine the effect of the feed concentration (1, 2, 3 and 6 mequiv/ᐉ) and the composition of the metal ion solution [0.25, 0.50 and 0.75 Cu(II)/Cr(III) ratio] on the behaviour of the breakthrough curves. A mathematical model was applied to describe the biosorption in a fixed-bed column. Equilibrium was described in this model in terms of a binary Langmuirtype adsorption process, together with mass transfer in the biosorbent based on the Linear Driving Force (LDF) model. The partial differential equations for the system were solved numerically by the finite volume method. The proposed mathematical model for the biosorption process provided a satisfactory description of the dynamics of metal ion removal in the column relative to the experimental data obtained. The adsorptive capacity of the biomass for Cr(III) ions in the binary system was greater than that for Cu(II) ions. The developed model could provide a useful tool for the optimization of Cr(III) and Cu(II) ion removal processes by Sargassum sp. biomass and the design of the corresponding fixed-bed columns.

show abstract

Section: Resultssupporting

confidence: 92%

Biosorption of Chromium(III) and Copper(II) Ions onto Marine Alga Sargassum sp. in a Fixed-bed Column

Silva

Vaz

Veit

et al. 2010

Adsorption Science & Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Several authors have used adsorption models to describe experimental data for ion exchange in zeolites and other materials (Misak, 1995;Malekian et al, 2010;Ostroski et al, 2009;Al-Anber and Al-Anber, 2008, Silva et al, 2003, Torab-Mostaedi et al, 2010, Senthil Kumar et al, 2010. In applying such models, one should bear in mind that the ion exchange process is the most important sorption mechanism although the subsequent adsorption phenomena should not be neglected.…”

Section: Isotherm Constructionmentioning

confidence: 99%

Determination of the maximum retention of cobalt by ion exchange in h-zeolites

Zola

Barros

Sousa-Aguiar

et al. 2012

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-This work aimed to determine the maximum content of cobalt that can be incorporated by ion exchange in zeolites H-USY, H-Beta, H-Mordenite, and H-ZSM-5. To reach this goal, batch isotherms at 75ºC were constructed after addition of zeolite samples in flasks filled with cobalt nitrate solution. The equilibrium data were fitted to Langmuir, Freundlich, and Tóth adsorption isotherm models. Langmuir was the best model for zeolites H-Beta, H-Mordenite, and H-ZSM-5, whereas experimental data for H-USY were better fitted to the Freundlich isotherm model. From the isotherms, it was possible to determine the maximum cobalt exchange level (q max ) that can be incorporated in each zeolite through ion exchange. In this sense, H-USY presented the highest q max value (2.40 meq/g zeol ), while H-ZSM-5 showed the lowest one (0.64 meq/g zeol ).These results also show the influence of the zeolite framework related to the channel system, pore opening, presence of cavities and secondary porosity and SiO 2 /Al 2 O 3 ratio (SAR) on the maximum capacity and behavior of cobalt ion exchange in protonic zeolites.

show abstract

“…and Leite, 2000;Silva et al, 2003;Loukidio et al, 2004;Halttunen et al, 2007;Kim et al, 2007;Nasir et al, 2007;Deng et al, 2007;Dahiya et al, 2008;Tunali et al, 2009).…”

Section: Brazilian Journal Of Chemical Engineeringunclassified

Removal of corper(II) Ions from aqueous solution by a lactic acid bacterium

Yılmaz

Tay

Kıvanç

et al. 2010

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-Enterococcus faecium, a lactic acid bacterium (LAB), was evaluated for its ability to remove copper(II) ions from water. The effects of the pH, contact time, initial concentration of copper(II) ions, and temperature on the biosorption rate and capacity were studied. The initial concentrations of copper(II) ions used to determine the maximum amount of biosorbed copper(II) ions onto lyophilised lactic acid bacterium varied from 25 mg L -1 to 500 mg L -1 . Maximum biosorption capacities were attained at pH 5.0 and 6.0. Temperature variation between 20°C and 40°C did not affect the biosorption capacity of the bacterial biomass. The highest copper(II) ion removal capacity was 106.4 mg per g dry biomass. The correlation regression coefficients show that the biosorption process can be well defined by the Freundlich equation. The change in biosorption capacity with time was found to fit a pseudo-second-order equation.

show abstract

Biosorption of binary mixtures of Cr(III) and Cu(II) ions by Sargassum sp

Cited by 29 publications

References 12 publications

Biosorption of Chromium(III) and Copper(II) Ions onto Marine Alga Sargassum sp. in a Fixed-bed Column

Biosorption of Chromium(III) and Copper(II) Ions onto Marine Alga Sargassum sp. in a Fixed-bed Column

Determination of the maximum retention of cobalt by ion exchange in h-zeolites

Removal of corper(II) Ions from aqueous solution by a lactic acid bacterium

Contact Info

Product

Resources

About