Influence of the colloid type on the transfer of 60Co and 85Sr in silica sand column under varying physicochemical conditions

Microplastics and Nanoplastics in Aquatic Environments: Aggregation, Deposition, and Enhanced Contaminant Transport

“…The mobility of organic and inorganic contaminants can be enhanced by association with colloids in soils, surface waters, and groundwaters. ,, Natural colloids (e.g. iron oxides and clays) have been reported to increase the transport of metals such as copper, zinc, lead, cadmium, arsenic, and nickel up to 50 times the rates observed in the absence of colloids. ,,,− Colloids have also demonstrated the potential for promoting the transport of organic pollutants, such as prochloraz, glyphosate, and atrazine. − The movement of colloids can be faster than that of the porewater because of the size exclusion effect, in which colloids are excluded from small pores …”

Experimental and numerical investigations of effect of column length on retardation factor determination: A case study of cesium transport in crushed granite

“…For example, the diffusion coefficient of most cations or anions lies in the magnitude of 10 −9 -10 −12 m/s, showing an intensive experimental time of nearly one year is required to obtain a complete breakthrough of a 2 cm column. The lengths of the packed substance columns ranged from 2 cm to 200 cm and the column diameters varied from 2.5 cm to 7.5 cm [6,[9][10][11][12][13][14][15]. In spite of differences in column lengths, few works are aimed to examine the validity of parameters determined with different column lengths or flow rates in one study.…”

Particulate Phases Possibly Conveyed from Nuclear Waste Repositories by Groundwater

“…In the first case, a solution spiked with the investigated radionuclide is mixed for a certain time-interval with the solid of interest, then the solution and/or the solid are analyzed (e.g., Anderson et al, 2009;Bradbury et al, 2005;Hu, Cheng, Zhang & Yang, 2010;Lujanienė et al, 2010;Rabung et al, 2005;Singer, Maher & Brown Jr, 2009). The column experiments investigate the radiocolloids migration characteristics, by simulating the groundwater flow conditions (e.g., Bryan et al, 2005;Li et al, 2011;Mibus et al, 2007;Solovitch-Vella et al, 2006).…”