Colloid-Facilitated Transport of Radionuclides through the Vadose Zone [PDF]
, 2001 This project seeks to improve the basic understanding of the role of colloids in facilitating the transport of contaminants in the vadose zone. We focus on three major thrusts: (1) thermodynamic stability and mobility of colloids formed by reactions of sediments with highly alkaline tank waste solutions, (2) colloid-contaminant interactions, and (3) in
Flury, Markus +4 more
core +24 more sources
The Role of Desorption Kinetics and Physical Heterogeneity in Colloid-Facilitated Transport of Cesium and Strontium in an Unsaturated Quartz Column [PDF]
, 2012 Colloid-facilitated transport of strongly-sorbing contaminants has been observed in the environment under saturated and unsaturated conditions. Our research investigated the role of desorption kinetics on the colloid-facilitated transport of cesium and ...
Dittrich, Timothy M.
core +4 more sources
Colloid-Facilitated Transport of Cations in an Unsaturated Fractured Soil Under Transient Conditions [PDF]
, 2011 Rainfall experiments were conducted using intact soil cores and an instrumented soil pedon to examine the effect of physical heterogeneity and rainfall characteristics on the mobilization of colloids, organic matter, cesium, and strontium in a fractured ...
Mohanty, Sanjay Kumar
core +5 more sources
Field-scale study of colloid transport in fracture flow from a sloping farmland of purple soil
Shui kexue jinzhan, 2015 To evaluate natural colloid transport potentials into groundwater,via fracture flow,a field-scale study was undertaken on a large sloping farmland plot(1 500 m2) in central Sichuan in the summer of 2013.
ZHANG Wei, TANG Xiangyu, XIAN Qingsong
doaj +1 more source
Vadose Zone Journal, 2023 In this study, the impact of colloid facilitated transport of heavy metals on the overall biogeochemical processes is demonstrated in example Lake Coeurd'Alene sediments. Release and transport of heavy metals (Pb and Zn) on initially sorbed colloidal Fe (
S. Sevinç Şengör, Kahraman Ünlü
doaj +1 more source
Impact of heavy metal cations on deposition and release of clay colloids in saturated porous media
Vadose Zone Journal, 2023 While the facilitated transport of heavy metals by colloids such as clay particles has been widely recognized, the influence of heavy metals on transport of the colloids has received much less attention.
Kaiyu Shi +5 more
doaj +1 more source
Dispersible Colloid Facilitated Release of Organic Carbon From Two Contrasting Riparian Sediments
Frontiers in Water, 2020 In aqueous systems, including groundwater, nano-colloids (1–100 nm diameter) and small colloids (<450 nm diameter) provide a vast store of surfaces to which organic carbon (OC) can sorb, precluding its normal bioavailability. Because nanomaterials are
Kenton A. Rod +9 more
doaj +1 more source
Colloid-Facilitated Plutonium Transport in Saturated Alluvium [PDF]
, 2004 Natural groundwater colloids have been recognized as possible agents for enhancing the subsurface transport of strongly-sorbing radionuclides. To evaluate this mechanism, packed-bed column experiments were conducted comparing the simultaneous transport of dissolved plutonium (Pu), Pu sorbed onto natural colloids, 190-nm and 500-nm diameter fluorescent ...
Abdel-Fattah, A. +3 more
openaire +2 more sources
Long-Term Colloid Mobilization And Colloid-Facilitated Transport Of Radionuclides In A Semi-Arid Vadose Zone [PDF]
, 2012 The main purpose of this project was to improve the fundamental mechanistic understanding and quantification of long-term colloid mobilization and colloid-facilitated transport of radionuclides in the vadose zone, with special emphasis on the semi-arid ...
Gee, Glendon W +9 more
core +1 more source
Chemical Speciation & Bioavailability, 2018 The transport of Pb(II) or Cd(II) in subsurface has been studied in the literature; however; their co-transport in porous media in presence of colloids has not been clearly understood.
Bingyi Xie +6 more
doaj +1 more source