Bioflotation
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Fundamental bioflotation aspects of hematite using an extracted Rhodococcus opacus by-product
Abstract The aim of this study is to assess the floatability of hematite using a crude biosurfactant (BS) extracted from Rhodococcus opacus. Throughout high-pressure ethanol extraction, unrefined surfactant was extracted from the bacteria with a yield of 0.3 g/L. An FTIR analysis on this extract, shows the presence of alcohol (–OH) and ketone (C=O) groups,
REM, Int. Eng. J.. Publicado em: 2021-09
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2. Cellular Adaptation: Culture conditions of R. opacus and bioflotation of apatite and quartz
Abstract It is well known that the culture conditions of microorganisms may affect their surface properties, zeta potential and hydrophobicity via the modification of the cell wall functional groups or metabolic products. The R. opacus bacteria strain was separately adapted to the presence of apatite and quartz, after which a cellular adaptation procedure wa
REM, Int. Eng. J.. Publicado em: 2017-03
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3. Bioflotation of apatite and quartz: Particle size effect on the rate constant
This work deals with the fundamental aspects of apatite and quartz bioflotation using R. opacus bacteria as a bioreagent. It was observed that the flotability of both minerals depends on the pH value and the mineral particle size. The maximum flotability of both minerals was presented at a pH value of 5, achieving values of 90% and 14% for apatite and quartz
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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4. TRATAMENTO DE SOLUÇÕES AQUOSAS CONTENDO ZINCO, COBRE E CÁDMIO POR PROCESSO COMBINADO DE BIOSSORÇÃO/BIOFLOTAÇÃO / TREATMENT OF AQUEOUS SOLUTIONS CONTAINING ZINC, COPPER AND CADMIUM BY COMBINED BIOSORPTION/BIOFLOTATION PROCESS
Neste trabalho foi avaliado o potencial do microrganismo Streptomyces lunalinharesii como biossorvente para a remoção de Zn(II), Cu(II) e Cd(II) de soluções aquosas pelo processo de biossorção/bioflotação, através de ensaios experimentais em batelada. Os parâmetros operacionais investigados na etapa de biossorção foram: pH da solução, concentra
Publicado em: 2010
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5. REMOÇÃO DE PB, CR E CU POR PROCESSO COMBINADO DE BIOSSORÇÃO/BIOFLOTAÇÃO UTILIZANDO A CEPA RHODOCOCCUS OPACUS / REMOVAL OF PB, CR AND CU BY A COMBINED BIOSORPTION / BIOFLOTATION PROCESS USING A RHODOCOCCUS OPACUS STRAINT
This work evaluated the potential of the Rhodococcus opacus strain as a biosorbent for the removal of Pb(II), Cr(III) and Cu(II) from aqueous solutions by Biosorption/bioflotation process, through experimental batch tests. The operational parameters investigated in the biosorption´s stage were: pH of the solution, biomass concentration, contact time and ini
Publicado em: 2007
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6. BIOFLOTAÇÃO DE MAGNESITA, CALCITA E BARITA USANDO RHODOCOCCUS OPACUS COMO BIORREAGENTE / BIOFLOTATION OF MAGNESITE, CALCITE AND BARITE USING RHODOCOCCUS OPACUS AS BIOREAGENT
A bactéria Rhodococcus opacus foi avaliada como biorreagente para a flotação dos minerais da magnesita calcita e barita. As análises para determinar a conformação de parede o R. opacus estabelecem que é constituída por macromoléculas com características anfipáticas. O balanço entre grupos catiônicos e aniônicos da parede atribui um ponto isoel�
Publicado em: 2007
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7. AVALIAÇÃO DA REMOÇÃO DE CD E ZN DE SOLUÇÃO AQUOSA POR BIOSSORÇÃO E BIOFLOTAÇÃO COM RHODOCOCCUS OPACUS / A STUDY OF CD AND ZN UPTAKE AND REMOVAL BY BIOSORPTION AND BIOFLOTATION USING RHODOCOCCUS OPACUS
The search for new technologies for the removal of hazardous metals from wastewater has been focused on several features for the biological materials as such: metal binding and flotation abilities. The aim of this work was to evaluate the biosorption and bioflotation abilities of Rhodococcus opacus for cadmium and zinc removal. Pre and post-characterizations
Publicado em: 2005