Fine particle attachment to quartz sand in the presence of multiple interacting dissolved components

Rastghalam, Zahra Sadat; Cheng, Tao; Freake, Bradley

doi:10.1016/j.scitotenv.2018.07.131

Cited by 7 publications

(1 citation statement)

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“…Several studies performed in quartz sand columns suggested a similar positive influence of phosphorus species on several types of NPs and especially of TiO2-NPs (Hou et al 2017;Rastghalam et al 2018;Xu et al 2020). Xu et al (2018) studying a TiO2 NP's -phosphatebacteria ternary system showed that phosphate species generally facilitates the transport of TiO2…”

Section: Phosphate Effect On Nps Transportmentioning

confidence: 96%

Low mobility of CuO and TiO2 nanoparticles in agricultural soils of contrasting texture and organic matter content

Simonin

Martins

Uzu

et al. 2021

Science of The Total Environment

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The fate of nanoparticles (NPs) in soil under relevant environmental conditions is still poorly understood. In this study, the mobility of two metal-oxide nanoparticles (CuO and TiO2) in contrasting agricultural soils was investigated in water-saturated soil columns. The transport of TiO2 and CuO-NPs were assessed in six soils with three different textures (from sand to clay) and two contrasted organic matter (OM) contents for each texture. TiO2 mobility was very low in all soils, regardless of texture and OM content. Mass recoveries were always less than 5%, probably in relation with the strong homo-aggregation of TiO2-NPs observed in all soil solutions, with apparent sizes 3-6 times larger than their nominal size. This low mobility suggests that TiO2-NPs present a low risk of direct groundwater contamination in contrasted surface soils. Although their retention was also generally high (more than 86%), CuO nanoparticles were found to be mobile in all soils. This is probably related to their smaller apparent size and low capacity of homo-aggregation of CuO-NPs in all soil solutions. No clear influence of neither soil texture or soil total organic matter content could be observed on CuO transport. However, this study shows that in contrasted agricultural soils, CuO-NPs transport is mainly controlled by the solutes dissolved in soil solution (DOC and PO4 species), rather than by the properties of the soil solid phase.

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Section: Phosphate Effect On Nps Transportmentioning

confidence: 96%