Magnetic resonance imaging reveals detailed spatial and temporal distribution of iron-based nanoparticles transported through water-saturated porous media

Cuny, Laure; Herrling, Maria Pia; Guthausen, Gisela; Horn, Harald; Delay, Markus

doi:10.1016/j.jconhyd.2015.08.005

Cited by 14 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, it is often applied to visualize biofilms within porous media (e.g., soils; [Hoskins et al, ]) as well as resolve transport phenomena (Baumann and Werth, ; Gjersing et al, ; Hornemann et al, ). In addition to transport of dissolved species (i.e., metal ions; McLean et al, ; Ramanan et al, and substrates; Renslow et al, ), nanoparticle transport, interaction with humic substances, and deposition in porous media systems was studied recently (Cuny et al, ).…”

Section: Established Biofilm Imaging Techniquesmentioning

confidence: 99%

Optical coherence tomography in biofilm research: A comprehensive review

Wagner

Horn

2017

Biotech & Bioengineering

Self Cite

150

View full text Add to dashboard Cite

Imaging of biofilm systems is a prerequisite for a better understanding of both structure and its function. The review aims to critically discuss the use of optical coherence tomography (OCT) for the visualization of the biofilm structure as well as its dynamic behavior. A short overview on common and well-known, established imaging techniques for biofilms such as scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), Raman microscopy (RM), and magnetic resonance imaging (MRI) paves the way to imaging biofilms at the mesoscale, which is perfectly covered by means of OCT. Principle, resolution, imaging velocity, and limitations of OCT are subsequently presented and discussed in the context of biofilm applications. Examples are provided showing the strength of this technique with respect to the visualization of the mesoscopic biofilm structure as well as the estimation of flow profiles and shear rates. Common and new structural parameters derived from OCT datasets are presented. Additionally, the review shows the importance of OCT with respect to a better description of mechanical biofilm properties. Finally, the implementation of multi-dimensional OCT datasets in biofilm modelling is shown by several examples aiming on an improved understanding of mass transfer at the bulk-biofilm interface. Biotechnol. Bioeng. 2017;114: 1386-1402. © 2017 Wiley Periodicals, Inc.

show abstract

Section: Established Biofilm Imaging Techniquesmentioning

confidence: 99%

Optical coherence tomography in biofilm research: A comprehensive review

Wagner

Horn

2017

Biotech & Bioengineering

Self Cite

150

View full text Add to dashboard Cite

show abstract

“…Particle surface properties (surface functionalization and resulting zeta potential) have a major influence while their primary particle size turns out to be less relevant. In particular, the mobility of SPION is significantly increased in the presence of natural organic matter (NOM) due to the sorption of NOM onto the particle surface resulting in a more negative zeta potential [99]. Compared to nonmagnetic NPs, stability and transport of magnetic NPs are influenced also by the magnetically induced aggregation and retention in that magnetically induced aggregation and subsequent straining results in greater retention [100].…”

Section: Fate and Transport Of Engineered Magnetite Nanoparticlesmentioning

confidence: 99%

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

2017

Journal of Hazardous Materials

308

View full text Add to dashboard Cite

“…Furthermore they do not penetrate into the alginate gel layer, this leads to the conclusion, that either the gel layer has a relatively dense structure as explained by the egg-box model 4,6,28 or the potential of agglomeration is high in the presence these potential seeds of nucleation as it was observed in the context of MRI on biofilms. [39][40][41] The latter possibility is unlikely as the MIONs disperse completely when added to an alginate solution, and no signature of agglomeration is observed. These findings lead us to the conclusion that the alginate layer in the presence of Ca 21 is dense enough to inhibit the ingress of the nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

New insights into sodium alginate fouling of ceramic hollow fiber membranes by NMR imaging

et al. 2016

View full text Add to dashboard Cite

Ceramic hollow fiber membranes are investigated with respect to the fouling behavior. Constant pressure dead-end filtration experiments have been performed using alginate as model substance for extracellular polymeric substances. In addition to the evaluation of the filtration data using conventional cake filtration model, nuclear magnetic resonance imaging (MRI) was used to elucidate the influence of Ca 21 on the fouling layer structure for alginate filtration within ceramic hollow fiber membranes. To visualize the alginate layers inside the opaque ceramic hollow fiber membranes by means of MRI, specific contrast agents were applied. Supplementary to multi slice multi echo imaging, flow velocity measurements were performed to gain more insight into the hydrodynamics in the fouled membranes. MRI reveals the structure of the alginate layers with the finding that the addition of Ca 21 to the alginate feed solution promotes the formation of a dense alginate gel layer on the membrane's surface.

show abstract

Magnetic resonance imaging reveals detailed spatial and temporal distribution of iron-based nanoparticles transported through water-saturated porous media

Cited by 14 publications

References 47 publications

Optical coherence tomography in biofilm research: A comprehensive review

Optical coherence tomography in biofilm research: A comprehensive review

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

New insights into sodium alginate fouling of ceramic hollow fiber membranes by NMR imaging

Contact Info

Product

Resources

About