Investigation of Platinum and Nickel Nanoparticles Migration and Accumulation in Soils within the Southeastern Part of West Siberia

Abstract

The migration and accumulation of nickel (nNi) and platinum (nPt) nanoparticles (NPs) in loamy sand and loamy soils (Luvisols) occupying the largest area in the southeastern part of West Siberia, have been investigated. The experiments were made in situ. The loamy sand soils (Albic Lamellic Luvisol) were tested down to a depth of 55 cm to sorb 100% nNi and at least 71% nPt of their total introduced amount. The rest 29% nPt either penetrated below the depth of 55 cm, or moved laterally. The experimental results in loamy soils enormously differed. Thus, only 16 to 20% nPt and 8 to 10 % nPt migrated radially in the Albic Luvisol and adjacent Stagnic Luvisol, respectively, while the rest NPs shifted laterally. The differences between the loamy soils are associated with lesser biogenic porosity of the Stagnic Luvisol, and, as a consequence, with higher density. The NPs migration and sorption processes are related to the soil properties differentiation. The inverse correlation between the concentration of nPt sorbed in soil horizons and their density with R2 = 0.67 has been established. NPs have shown high migrational ability with nNi to a lesser extent, and nPt to a larger extent. During a single introduction, these are able to penetrate depths of more than 1 m with both gravitational and capillary water.

First Findings of Buried Late-Glacial Paleosols within the Dune Fields of the Tomsk Priobye Region (SE Western Siberia, Russia)

“…Since the relief of the surface where paleosol was found is concave, temporary perched water can move along it, laterally transporting clay particles. The possibility of such a process was experimentally shown for the territory under consideration [48].…”

Major and trace elements in suspended matter of western Siberian rivers: First assessment across permafrost zones and landscape parameters of watersheds

“…In reference to 2), since soils under forest cover are mineral-rich podzols and not the organic-rich histosols of palsa peat bogs, forest soils are capable of supplying a larger amount of mineral particles due to physical erosion of soil mineral horizons. The potential of fine particles transport in some forest mineral soils of Western Siberia has been recently demonstrated (Kulizhskii et al, 2017b). As such, forest soils may act as sources for vertically and laterally moving C-rich colloids and suspensions.…”

Evaluating the potential of capillary rise for the migration of Pt nanoparticles in Luvisols and Phaeozems (Western Siberia)

“…Epipedons are often characterized by increased water holding capacity (Polyakov et al, 2020). Due to this, the epipedons not only easily absorb suspensions but also fix them, acting as sorption barriers not only for dissolved forms, but also for nanoparticles (colloids) (Kulizhskiy et al, 2013(Kulizhskiy et al, , 2017. A higher intensity of Pt transfer with capillary rise was observed in the A and E horizons, while it was lower in the Bt and Cca horizons.…”

“…PtNPs were obtained by laser ablation in distilled water from high-purity (99.97%) platinum bars, as described in (Kulizhskiy et al, 2017). The characteristics of NPs were verified by TEM (Phillips CM-12, France), dynamic light scattering (Zetasizer Nano ZS, USA) and BET (TriStar 3000, USA).…”