Role of extracellular polymeric substances in metal ion complexation on Shewanella oneidensis: Batch uptake, thermodynamic modeling, ATR-FTIR, and EXAFS study

Ha, Ju-Young; Gélabert, Alexandre; Spormann, Alfred M.; Brown, Gordon E.

doi:10.1016/j.gca.2009.06.031

Cited by 168 publications

(93 citation statements)

References 80 publications

(113 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Biosorption, bioprecipitation, and bioaccumulation are lumped together as physical adsorption and described using a Langmuir adsorption isotherm (Sar and D'souza, 2001;Kazy et al, 2008;Ha et al, 2010). Because the mechanisms of U reduction are not fully understood, we assume that the U(VI) is first adsorbed and then can be reduced by the cell using electrons from lactate oxidation.…”

Section: U Immobilization In Cellsmentioning

confidence: 99%

Modeling Substrate Utilization, Metabolite Production, and Uranium Immobilization in Shewanella oneidensis Biofilms

Renslow

Ahmed

Nuñez

et al. 2017

Front. Environ. Sci.

View full text Add to dashboard Cite

In this study, we developed a two-dimensional mathematical model to predict substrate utilization and metabolite production rates in Shewanella oneidensis MR-1 biofilm in the presence and absence of uranium (U). In our model, lactate and fumarate are used as the electron donor and the electron acceptor, respectively. The model includes the production of extracellular polymeric substances (EPS). The EPS bound to the cell surface and distributed in the biofilm were considered bound EPS (bEPS) and loosely associated EPS (laEPS), respectively. COMSOL ® Multiphysics finite element analysis software was used to solve the model numerically (model file provided in the Supplementary Material). The input variables of the model were the lactate, fumarate, cell, and EPS concentrations, half saturation constant for fumarate, and diffusion coefficients of the substrates and metabolites. To estimate unknown parameters and calibrate the model, we used a custom designed biofilm reactor placed inside a nuclear magnetic resonance (NMR) microimaging and spectroscopy system and measured substrate utilization and metabolite production rates. From these data we estimated the yield coefficients, maximum substrate utilization rate, half saturation constant for lactate, stoichiometric ratio of fumarate and acetate to lactate and stoichiometric ratio of succinate to fumarate. These parameters are critical to predicting the activity of biofilms and are not available in the literature. Lastly, the model was used to predict uranium immobilization in S. oneidensis MR-1 biofilms by considering reduction and adsorption processes in the cells and in the EPS. We found that the majority of immobilization was due to cells, and that EPS was less efficient at immobilizing U. Furthermore, most of the immobilization occurred within the top 10 µm of the biofilm. To the best of our knowledge, this research is one of the first biofilm immobilization mathematical models based on experimental observation. It has the ability to predict the relative contributions to U immobilization of laEPS, bEPS, and cells.

show abstract

Section: U Immobilization In Cellsmentioning

confidence: 99%

Modeling Substrate Utilization, Metabolite Production, and Uranium Immobilization in Shewanella oneidensis Biofilms

Renslow

Ahmed

Nuñez

et al. 2017

Front. Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…The water-washed leachates were similar to those derived from real farming activities and animal husbandry, such as wastewater and rain runoff extracting Cu (II) and Cd (II) from the soil or paddy field via dissolution and leaching. Na 2 EDTA-washed leachates can extract more Cu (II) and Cd (II) from the soil or paddy field through both chelation and dissolution (González et al, 2010;Ha et al, 2010). Considering the complexity of agricultural soil waste leachates containing Cu (II) and Cd (II), microbial consortia with wide-ranging defense capabilities against stressor effects of diverse Cu and Cd ions should be employed.…”

Section: Heavy Metal Removal From Agricultural Solid Waste Leachatesmentioning

confidence: 99%

“…The EPS of periphyton protected cells from copper ions adsorbing to the cell wall by blocking access to the phosphoryl groups that would otherwise bind the Cu and Cd ions (González et al, 2010;Ha et al, 2010). The cationic Cu and Cd species in the aqueous phase were incorporated into the periphyton matrix through surface complexation via chelation with one or more of the peptidoglycans, teichoic acids, proteins, and lipoproteins of the EPS of the periphyton.…”

Section: +mentioning

confidence: 99%

Bioremediation of agricultural solid waste leachates with diverse species of Cu (II) and Cd (II) by periphyton

Yang

Liu

et al. 2016

Bioresource Technology

View full text Add to dashboard Cite

“…U zavisnosti od bakterijske vrste koje sintetišu EPS i uslova rasta, zavisi i udeo navedenih organskih jedinjenja koja ulaze u sastav EPS [18]. Zbog prisustva različitih funkcionalnih grupa u EPS poput karboksilnih, sulfhidrilnih, fenolnih, hidroksilnih grupa, EPS mogu formirati kompleks sa jonima metala [19][20][21] Neki autori su zabeležili da dolazi do ubrzane korozije metala u prisustvu mikroorganizama odnosno bakterija koje formiraju biofilm [22,23]. Do intenzivnijeg procesa korozije dolazi u prisustvu biofilma koji je sintetisan u prisustvu različitih bakterija.…”

Section: Formiranje Biofilmaunclassified

Microorganisms as potential corrosion inhibitors of metallic materials

Tasić¹,

Antonijević²,

Petrović-Mihajlović³

2016

Rec odr raz

View full text Add to dashboard Cite

IZVOD -Proces korozije predstavlja destrukciju kako metalnih tako i nemetalnih materijala usled hemijske ili elektrohemijske interakcije sa okolnom sredinom. Kao rezultat interakcija između površine metala i bakterijskih ćelija, odnosno njihovih metabolita nastaje mikrobiološki indukovana korozija. Međutim, neke vrste mikroorganizama utiču na smanjenje procesa korozije. Shodno tome, analizirana je literatura koja se bavi primenom mikroorganizama kao potencijalnih inhibitora korozije metala. Različite bakterijske vrste ispitivane su kao potencijalni inhibitori korozije. Istaknut je značaj samih mikroorganizama kao i uloga ekstracelularnih polimernih supstanci na koroziono ponašanje metala. Prikazano je da na stepen zaštite pored tipa primenjenog mikroorganizma, utiče i vrsta metala. Takođe, na osnovu prikazanih podataka može se videti da pojedine vrste mikroorganizma mogu uspešno zameniti organske inhibitore koji mogu biti toksični.Ključne reči: mikroorganizmi, korozija, metali, inhibitori, bakterijske vrste ABSTRACT -Corrosion presents the destruction of materials through chemical or electrochemical interactions with their environment. Interactions between the metal surface and bacterial cells or products of their metabolic activities can lead to microbially-influenced corrosion. Also, it is known that certain microorganisms can contribute to corrosion inhibition. In accordance to that, the literature dealing with the application of different microorganisms as a potentialy corrosion inhibitors of metals is investigated. Different bacterial strains as a corrosion

show abstract

Role of extracellular polymeric substances in metal ion complexation on Shewanella oneidensis: Batch uptake, thermodynamic modeling, ATR-FTIR, and EXAFS study

Cited by 168 publications

References 80 publications

Modeling Substrate Utilization, Metabolite Production, and Uranium Immobilization in Shewanella oneidensis Biofilms

Modeling Substrate Utilization, Metabolite Production, and Uranium Immobilization in Shewanella oneidensis Biofilms

Bioremediation of agricultural solid waste leachates with diverse species of Cu (II) and Cd (II) by periphyton

Microorganisms as potential corrosion inhibitors of metallic materials

Contact Info

Product

Resources

About