For example, whereas the viscosity of the silt slurries increased monotonically with concentration, the viscosity of the ash slurries decreased.
All the slurries were pseudoplastic (i.e., shear-thinning) and, at low weight concentrations (≤ 0.3 g g− 1), the rheologies of ash and silt slurries were nearly identical.
In addition, we found that, at high concentrations, the intensity of shear-thinning in the ash slurries was greater than in the silt slurries.
Ash incorporated into silt slurries induced this same complex behavior, indicating that ash alters the rheological properties of runoff in ways that would not be predicted simply based on its size.
It has occurred to me that perhaps TechCrunch pays insufficient attention to slurry, sediment, silt, sludge, mud, and muck; to canals, earthworks, levees, dikes, dredges, and the Army Corps of Engineers; to the vast engineering works, with lifespans measured in decades, that literally reshape our world.
In a Palouse loess silt loam soil, the variables included H2O2 concentration, slurry volume, and pH, with H2O2 catalyzed by naturally occurring iron oxyhydroxides.
The accuracy of the method was confirmed by analysis of two certified reference materials (NIST SRM 2702 Inorganics in Marine Sediment and IGI BIL-1 Baikal Bottom Silt) and by comparison of the results obtained for ten real samples by slurry sampling with those determined after microwave-assisted extraction by inductively coupled plasma time of flight mass spectrometry (TOF-ICP-MS).
Mine tailings are typically silt-sized materials derived from mineral processing, which are conventionally pumped as an aqueous slurry, thickened tailings or tailings paste to a tailings storage facility, usually a surface impoundment.
For the silt loam soil, 85% mineralization of BaP was observed using 15 M H2O2, no iron amendment, and a slurry volume of 20×the soil field capacity.
