Biosorption of lanthanum using Sargassum fluitans in batch system

Palmieri, Maurício César; Volesky, B.; Garcia, Oswaldo

doi:10.1016/s0304-386x(02)00133-0

Cited by 103 publications

(56 citation statements)

References 13 publications

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“…The protons just swept the metals away from the biosorbent. In another work, lanthanum could be completely desorbed from Sargassum fluitans by 0.24 mol L −1 HCl under the liquid to solid ratio of 0.5 L g −1 [11], confirming the requirement for a higher proton pressure in order for this to take place.…”

Section: Desorption Of An Individual Metal Systemmentioning

confidence: 59%

“…The recovered metals could be further used for process application in more concentrated solutions that could be obtained from continuous sorption/desorption cycles in a fixed-bed column reactor. Desorption studies have provided evidence on the reversibility of the metal sorption process using biomass and that HCl constitutes one of the most used elutants [8][9][10][11]. In addition, isocratic [12] and gradient [13] elution chromatography has employed nitric acid for rare earths separation.…”

Section: Introductionmentioning

confidence: 99%

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Desorption of lanthanum, europium and ytterbium from Sargassum

Diniz

Volesky

2006

Separation and Purification Technology

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The desorption of La, Eu and Yb was studied in this work. The purpose of this work was to verify the reversibility of the sorption reaction, and thus the possibility of the desorption process for simultaneous metal recovery and regeneration of the biomass. The desorption of calcium ions at different levels of pH using mineral acid was also verified and the Ca release increased with decreasing pH, achieving 2.5 mequiv. gat pH 2 and 2.8 mequiv. g −1 using 0.1 mol L −1 HNO 3 . Several eluting agents at different concentrations were tested to desorb the lanthanides including nitric and hydrochloric acids, calcium nitrate and chloride salts, EDTA, oxalic and diglycolic acids. 95-100% desorption for all metals was obtained with 0.3 mol L −1 HCl. La desorption with the other eluting agents was 70% with 2 mol L −1 CaCl 2 , 83.7%, with 0.5 mol L −1 EDTA and 88.4% with 0.023 mol L −1 diglycolic acid. A plateau was reached when a liquid to solid ratio (L/S) of 2 L g −1 was used with 0.1 mol L −1 HNO 3 . Desorption levels ranged between 85 and 95%. At the same (L/S) ratio, 0.2 mol L −1 HCl was able to elute all the metals from the individual metal loaded biomass, although it could not remove the metals completely from the mixed-metal loaded biomass. The desorption levels decreased with increasing metal sorption affinity as follows, 94.0, 86.3 and 75.2% for Yb, La and Eu, respectively when the eluting agent was 0.1N HCl. There was no difference between not washing the biomass at all and washing it either once or twice after the sorption process.

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Section: Desorption Of An Individual Metal Systemmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Desorption of lanthanum, europium and ytterbium from Sargassum

Diniz

Volesky

2006

Separation and Purification Technology

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“…These interferences in cadmium biosorption are resulted of the competition among the interesting metal and the counter-ion by the binding sites. Additionally, Palmieri et al (2002) studied the lanthanum biosorption by Sargassum fluitans in solution with chloride and sulfate ions: at same pH it was observed higher maximum metal uptake values for the biosorption on presence of chloride, as such can be seen on Fig. 4.…”

Section: Presence Of Counter-ionsmentioning

confidence: 93%

“…In the case of RE biosorption for Sargassum sp. biomass, Palmieri et al (2002) and Diniz & Volesky (2005) founded that the biosorption of La(III), Eu(III), and Yb(III) is more effective in crescent pH values (2.00 to 5.00) because the quantity of negative ligands is increased, and consequently the increase of the attraction among the ligands and the metallic cations. The optimal pH for Sargassum founded about 5.0.…”

Section: Chemical Speciation and Phmentioning

confidence: 99%

“…Other economic advantage is the possibility of biosorbent reuse from agro-industrial and domestic wastes (e.g., fermentation processes in breweries and pharmaceutics, activated sludge, sugarcane bagasse, etc.) (Godlewska-Zylkiewicz, 2006;Karnitz Jr., 2007;Pagnanelli et al 2004;Palmieri et al, 2002 Commonly, the biosorption studies describe applications with native biomasses and with products obtained from biomasses, which are generally biopolymers (polysaccharides and glycoproteins). The use of biosorbents in native forms from microbial biomasses (e.g.…”

Section: Biosorbentsmentioning

confidence: 99%

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Biosorption of Metals: State of the Art, General Features, and Potential Applications for Environmental and Technological Processes

Oliveira¹,

Palmieri²,

Garcia³

2011

Progress in Biomass and Bioenergy Production

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Biosorption, Metals

Naja¹,

Murphy²,

Volesky³

2010

Encyclopedia of Industrial Biotechnology

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Biosorption is a property of certain types of inactive, dead, microbial biomass to bind certain chemical components and thus also to concentrate heavy metals from even very dilute aqueous solutions. Certain types of biomass exhibit this property, acting just as chemical substances, as ion exchangers of biological origin. It is particularly the cell wall structure of certain algae, fungi and bacteria which was found responsible for this phenomenon. Some biomass types, serving as a basis for metal biosorption processes, can accumulate in excess of 25% of their dry weight in deposited heavy metals such as Pb, Cd, U, Cu, Zn, even Cr and others. Research on biosorption is revealing that it is sometimes a complex phenomenon where the metallic species could be deposited in the solid biosorbent through different sorption processes of ion exchange, complexation, chelation, microprecipitation, etc. A whole new family of suitably “formulated” biosorbents can be used in the process of metal removal and detoxification of industrial metal‐bearing effluents. The sorption packed‐column configuration is the most effective mode of application for the purpose. Recovery of the deposited metals from saturated biosorbent can be accomplished because they can often be easily released from the biosorbent in a concentrated wash solution which also regenerates the biosorbent for subsequent multiple reuse. This and extremely low cost of biosorbents makes the process highly economical and competitive particularly for environmental applications in detoxifying industrial metal‐bearing effluents.

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Biosorption of lanthanum using Sargassum fluitans in batch system

Cited by 103 publications

References 13 publications

Desorption of lanthanum, europium and ytterbium from Sargassum

Desorption of lanthanum, europium and ytterbium from Sargassum

Biosorption of Metals: State of the Art, General Features, and Potential Applications for Environmental and Technological Processes

Biosorption, Metals

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