We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Dataset on sinking of solid particles in non-ionic and single-salt aqueous dispersions of xanthan gum and carrageenan and rheological properties of these dispersions
AI summary Read the abstract
Researchers measured settling dynamics of spheres, disks, and rods in xanthan gum and carrageenan solutions containing individual salts and seawater mixtures, generating a dataset that characterizes how non-Newtonian rheology in marine-like polysaccharide dispersions affects the sinking behavior of small plastic particles.
This dataset contains (1) measurements of the settling dynamics of spheres, disks and rods in non-ionic and ionic aqueous solutions containing 1 g/L of xanthan gum (XG) and cappa-carrageenan (CR), (2) rheological characteristics of these non-Neatonian dispersions. Individual salts -NaCl, KCl, and CaCl2 and a mixture of salts corresponding to seawater were used in the study. Overall, five solutions with dispersed XG and five solutions with dispersed CR were considered. The sinking of six types of plastic particles with dimensions not exceeding 5 mm was examined in a settling column using visualisation and Particle Tracking Velocimetry methods to achieve data on the position of particle centroid in time. Rheological measurements were carried out to assess flow properties. Experiments on settling dynamics were conducted at the Laboratory of Hydrodynamic Micromodels, Institute of Geophysics, Polish Academy of Sciences and rheological measurements at the Faculty of Chemistry, Warsaw University of Technology.
More Papers Like This
Dataset on sinking of solid particles in non-ionic and single-salt aqueous dispersions of xanthan gum and carrageenan and rheological properties of these dispersions
AI summary Read the abstract
Researchers measured the settling velocities of six plastic particle shapes — including spheres, disks, and rods — in non-Newtonian xanthan gum and carrageenan solutions representing viscous aquatic environments, finding that ionic conditions and polymer type systematically alter sinking rates in ways relevant to predicting microplastic fate in coastal and marine waters.
Laboratory data on dynamics of microplastic particles sinking in seawater with dispersed xanthan gum and kappa-carrageenan and rheological properties of these dispersions
AI summary Read the abstract
Researchers generated a laboratory dataset on the sinking dynamics of microplastic particles — including disks, rods, blades, and spheres made of PS, POM, PET, and PA6 — settling in artificial seawater and in xanthan gum and kappa-carrageenan dispersions at two concentrations. Using shadowgraph visualisation and particle tracking velocimetry, the study characterised how biopolymer viscosity modifies microplastic sinking velocities and orientation in seawater.
Effect of exopolymer gels on the viscoelasticity of mucus-rich saltwater and settling dynamics of particles
AI summary Read the abstract
Researchers investigated how exopolymer gels produced during algal blooms affect the rheological properties of mucus-rich saltwater and the settling dynamics of particles, using xanthan gum as a model exopolymer in sodium chloride solutions. They found that colloidal exopolymers created a stronger internal structure than particulate gels and increased drag coefficients on sinking particles up to sixfold, suggesting colloidal exopolymers retard particle settling in marine environments more effectively.
Viscoelastic and shear-thinning effects of aqueous exopolymer solution on disk and sphere settling
AI summary Read the abstract
Using a gel-like polymer to mimic natural aquatic conditions, researchers found that the gel's non-Newtonian properties significantly slow the settling speed of particles compared to plain water. This suggests microplastics in natural waters rich in organic matter may sink more slowly than lab studies in clean water would predict.
Settling of microplastics in mucus-rich water column: The role of biologically modified rheology of seawater
AI summary Read the abstract
Laboratory experiments showed that naturally occurring exopolymers secreted by marine algae and bacteria convert seawater into a non-Newtonian fluid that slows the sinking of microplastic particles, altering how and where they accumulate in the ocean water column. Understanding these biologically driven settling dynamics is important for predicting microplastic distribution and exposure risk for marine organisms at different depths.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.