Sorption of Cd(II) and Pb(II) by exopolymeric substances (EPS) extracted from activated sludges and pure bacterial strains: Modeling of the metal/ligand ratio effect and role of the mineral fraction

Guibaud, Gilles; Hullebusch, Eric D. van; Bordas, François; d’Abzac, Paul; Joussein, Emmanuel

doi:10.1016/j.biortech.2009.01.040

Cited by 80 publications

(37 citation statements)

References 37 publications

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“…Polysaccharides are important binding sites for metals (Guibaud et al, 2009;Zhang et al, 2006). Besides, uronic acids, DNA, and phosphate may also be involved in binding with cations (Quiroz et al, 2006;Beech and Sunner, 2004).…”

Section: Binding Mechanism Eps-al 3+mentioning

confidence: 99%

“…Now a growing number of researchers have noticed that the EPS is responsible for the movement and transformation of metal ions in wastewater treatment systems. Some researchers found that EPS has a huge surface area and a negative charge on its surface, and can undergo complexation reactions with a variety of metal ions, such as Cd, Ni, and Zn (Guibaud et al, 2009;Zheng et al, 2008). It has been reported that the content of Al 3+ in the TB-EPS fraction has a higher ratio compared to other fractions in activated sludge.…”

Section: Introductionmentioning

confidence: 99%

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Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances

Ruan

Liu

2013

Journal of Environmental Sciences

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Aluminum flocculant can enhance the flocculating performance of activated sludge. However, the binding mechanism of aluminum ion (Al 3+ ) and extracellular polymeric substances (EPS) in activated sludge is unclear due to the complexity of EPS. In this work, threedimensional excitation emission matrix fluorescence spectroscopy (3DEEM), fluorescence quenching titration and Fourier transform infrared spectroscopy (FT-IR) were used to explore the binding behavior and mechanism between Al 3+ and EPS. The results showed that two fluorescence peaks of tyrosine-and tryptophan-like substances were identified in the loosely bound-extracellular polymeric substances (LB-EPS), and three peaks of tyrosine-, tryptophan-and humic-like substances were identified in the tightly boundextracellular polymeric substances (TB-EPS). It was found that these fluorescence peaks could be quenched with Al 3+ at the dosage of 3.0 mg/L, which demonstrated that strong interactions took place between the EPS and Al 3+ . The conditional stability constants for Al 3+ and EPS were determined by the Stern-Volmer equation. As to the binding mechanism, the -OH, N-H, C=O, C-N groups and the sulfur-and phosphorus-containing groups showed complexation action, although the groups in the LB-EPS and TB-EPS showed different behavior. The TB-EPS have stronger binding ability to Al 3+ than the LB-EPS, and TB-EPS play an important role in the interaction with Al 3+ .

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Section: Binding Mechanism Eps-al 3+mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances

Ruan

Liu

2013

Journal of Environmental Sciences

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“…According to this, the biomass released protons during the uptake of Fe(II) and proton exchange should be one of the main mechanism involved in the interaction. This mechanism has been referred to as one of the most important in the metal uptake by EPS (Guibaud et al, 2009).…”

Section: Sorption Mechanism Of Fe(ii) By Epsmentioning

confidence: 99%

Sorption of ferrous iron by EPS from the acidophilic bacterium <em>Acidiphilium</em> Sp.: A mechanism proposal

et al. 2016

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ABSTRACT:The aim of this work was to assess the uptake of Fe(II) by extracellular polymeric substances (EPS) from the acidophilic bacterium Acidiphillium 3.2Sup(5). These EPS were extracted using EDTA. EPS of A. 3.2Sup(5) loaded in sorption tests with Fe(II), were characterized using the following experimental techniques: scanning electron microscopy (SEM) with energy dispersive X-ray microanalysis (EDX), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The experimental results indicate that EPS adsorb ferrous iron according to Freundlich model with a metal sorption uptake of K = 1.14 mg 1−1/n L 1/n g −1and a sorption intensity of 1/n = 1.26. In addition, ferrous iron sorption by EPS took place by preferential interaction with the carboxyl group which promotes the formation of ferrous iron oxalates (FeC 2 O 4 ). Since the interaction reaction was reversible (Log K = 0.77 ± 0.33), that means that the cation sorption can be reversed at convenience. . 3.2Sup(5) cargadas con Fe(II) fueron caracterizadas usando las siguientes técnicas experimentales: microscopia electrónica de barrido (MEB) con microanálisis de energía dispersiva de rayos X (EDX), difracción de rayos X (DRX), y espectroscopía infrarojo (IR) con transformada de Fourier (EIRTF). Los resultados muestran que las SPE absorben Fe(II) según el modelo de Freundlich con un coeficiente de sorción K = 1,14 mg 1−1/n g −1 e intensidad 1/n = 1,26. La captación de Fe(II) por las SPE ocurre a través de la formación de oxalatos de hierro (FeC 2 O 4 ), a través de una reacción reversible (Log K = 0,77 ± 0,33), lo cual implica que el hierro captado podría recuperarse si fuera de interés.

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“…The content of the biofilm in the suspended biomass has a significant impact on the suspended biomass sorption capacity. Biofilm structure and the extracellular polymeric substance (EPS) content increase the possibility of ion sorption (Guibaud et al, 2009;Ozturk et al, 2009;Ni et al, 2010). EPS is polyanionic in nature, with enhanced capability for cation ion bonding.…”

Section: +mentioning

confidence: 99%

Biosorption of Mn (II), Co (II) and Cr (VI) in a horizontal rotating tubular bioreactor: experiments and evaluation of the integral bioprocess model

Rezić

Zeiner

et al. 2014

Braz. J. Chem. Eng.

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-In this research, a multi heavy metals removal process with mixed microbial culture was examined in a horizontal rotating tubular bioreactor (HRTB) with different combinations of process parameters. Three metals were selected as examples of cations (manganese and cobalt) and oxy-anion (hexavalent chromium). Hydrodynamic conditions and biomass sorption capacity in the HRTB had the main impact on the heavy metals removal efficiencies, which were for Mn 2+ 87.0-93.6%, Co 2+ 89.0-95.7% and Cr 6+ 99.7-100%, respectively. For the bioprocess description in the HRTB, the integral bioprocess model that combines hydrodynamics, mass transfer and kinetics was used. This model was evaluated for the new experimental conditions and average variances between experimental and simulated data were in the range of 0.12 -3.21·10 -3 . The results obtained clearly show that the integral bioprocess model is able to describe the heavy metal removal process in the HRTB.

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Sorption of Cd(II) and Pb(II) by exopolymeric substances (EPS) extracted from activated sludges and pure bacterial strains: Modeling of the metal/ligand ratio effect and role of the mineral fraction

Cited by 80 publications

References 37 publications

Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances

Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances

Sorption of ferrous iron by EPS from the acidophilic bacterium <em>Acidiphilium</em> Sp.: A mechanism proposal

Biosorption of Mn (II), Co (II) and Cr (VI) in a horizontal rotating tubular bioreactor: experiments and evaluation of the integral bioprocess model

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