Results 181 to 190 of about 35,185 (226)
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Biosorption of cadmium with brown macroalgae
Chemosphere, 2015Sorption experiments for cadmium removal using two brown macroalgae Lessonia nigrescens and Durvillaea antarctica were carried out. Although both types of algae were capable of retaining cadmium, differences in their performance were observed. The optimum pH was 3.7±0.2, and to achieve the equilibrium, 5 days of contact time were necessary for both ...
Claudia, Gutiérrez +3 more
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2002
There are many interactions between living cells and metals. Essential metals must he taken up by the cells, and they must be stored at their destinations. When the metals are present in the medium in too low a concentration, they must be accumulated. If the ambient metal concentration is too high, even essential metals become toxic and mechanisms of ...
M. Zimmermann, K. Wolf
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There are many interactions between living cells and metals. Essential metals must he taken up by the cells, and they must be stored at their destinations. When the metals are present in the medium in too low a concentration, they must be accumulated. If the ambient metal concentration is too high, even essential metals become toxic and mechanisms of ...
M. Zimmermann, K. Wolf
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Electric field-assisted biosorption
Biotechnology Letters, 2004A bisorption process using electric fields to facilitate contact between a sorbate and non-living biomass is described. The latter is enclosed within a semi-permeable membrane together with an electrode. The counter electrode is placed in the sorbate solution and an established potential across the electrodes facilitates electrokinetic movement of the ...
C R, Riordan +4 more
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Optimization of a Biosorption Column Performance
Environmental Science & Technology, 2008The dynamics of copper and zinc biosorption by Sargassum fluitans was analyzed under variable column operating conditions including different column lengths (15 and 45 cm), metal-feed solution concentrations (1 and 6 meq L(-1)), metal-sorbent affinities (2.01 and 0.45), and interstitial velocities (12 and 4 cm min(-1)).
Ghinwa, Naja, Bohumil, Volesky
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1998
The ability of microorganisms to remove metal ions from dilute aqueous solutions is a widely studied phenomenon. Numerous applications of biosorption, mainly in laboratory or in pilot-scale, but recently also industrially, make often use of non-living biomass, which does not require supply of nutrients and can be exposed to environments of high ...
A. I. Zouboulis, K. A. Matis
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The ability of microorganisms to remove metal ions from dilute aqueous solutions is a widely studied phenomenon. Numerous applications of biosorption, mainly in laboratory or in pilot-scale, but recently also industrially, make often use of non-living biomass, which does not require supply of nutrients and can be exposed to environments of high ...
A. I. Zouboulis, K. A. Matis
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Removal of humic substances by biosorption
Journal of Environmental Sciences, 2008Fungal pellets of Aspergillus niger 405, Aspergillus ustus 326, and Stachybotrys sp. 1103 were used for the removal of humic substances from aqueous solutions. Batchwise biosorption, carried out at pH 6 and 25 degrees C, was monitored spectrophotometrically and the process described with Freundlich's model.
Vuković Domanovac, Marija +2 more
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Biosorption of Rare Earth Elements
Mineral Processing and Extractive Metallurgy Review, 1998Abstract By using X-ray microanalysis, the mechanism of sorption of rare earth elements (REE) and their localization in cells of Candida utilis were found to depend on the metal ion speciation in solution, the permeability of the cytoplasmic membrane (CPM), and elemental composition of cells.
A.A. Korenevsky +2 more
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Biosorption: A Mechanistic Approach
2013The ability of microbial cells to sequester solutes selectively from aquatic solutions, via nonmetabolically mediated pathways, has been termed biosorption. The mechanism of biosorption has been shown not to be simple and often specific to the biomass-solute pair. The understanding of the mechanism at play, in each biosorption system, is a prerequisite
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Cadmium removal in a biosorption column
Biotechnology and Bioengineering, 1994AbstractNew biosorbent material derived from a ubiquitous brown marine alga Ascophyllum nodosum has been examined in packed‐bed flow‐through sorption columns. It effectively removed 10 mg/L of cadmium down to 1.5 ppb levels in the effluent, representing 99.985% removal.
B, Volesky, I, Prasetyo
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Engineering of membrane biosorption
Desalination, 2002Membrane biosorption is a new integrated process for xenobiotics removal from a water environment. The mathematical model has been presented in the paper based on biosorption equilibrium and kinetics as well as relevant mass balances of the integrated system.
Andrzej Koltuniewicz, Katarzyna Bezak
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