A critical evaluation of short columns for estimating the attachment efficiency of engineered nanomaterials in natural soils

Abstract

Short, saturated packed columns are used frequently to estimate the attachment efficiency (α) of engineered nanomaterials (ENMs) in relatively homogeneous porous media, but a combined experimental and theoretical approach to...

Use of metal-tagged environmentally representative micro- and nanoplastic particles to investigate transport and retention through porous media using single particle ICP-MS

“…This could be due to the hydrophobic particles being captured by a small amount of trapped air that may have accumulated near the top of the column. Though experiments were all assumed to be saturated, the presence of a small amount of air introduced into the column could possibly trap hydrophobic colloids such as PS particles at the airwater interface [61][62][63], leading to high concentrations of particles. If these particles are then released together, coincidence would then lead to the apparent presence of very large particles in analysis.…”

Results of an interlaboratory comparison for characterization of Pt nanoparticles using single-particle ICP-TOFMS

“…The probability of such events can be determined by coincidence analysis and limited using adequate dilution. 25 The capabilities of sp-ICP-TOFMS have already been demonstrated through numerous different case studies, including multi-element NP characterization, 26,27 distinguishing between naturally occurring (NNPs) and engineered nanoparticles (ENPs), 16,28,29 analysis of surface water [30][31][32] and wastewater samples, 33 soil samples, [34][35][36] gunshot residues, 37,38 microplastics, 39,40 as well as more exotic samples such as polar ice dust 41 and space-station dust particles. 42 While all these works highlighted the benefits of TOFMS for multi-element NP analysis, the sp-ICP-TOFMS methodology has not yet been validated.…”