Results 211 to 220 of about 2,788,214 (253)

Colloid-facilitated transport of hydrolytic enzymes in soils

2022
<p>Colloids are known to facilitate transport of a broad variety of chemicals and microorganisms in soils. Extracellular hydrolytic enzymes, produced by many soil microorganisms and plant roots, have high affinity to clay and silt particles constituting soil mineral colloids (SMC).
Andrey Guber, Alexandra Kravchenko
openaire   +1 more source

Colloid‐facilitated groundwater contaminant transport

Water Resources Research, 1993
Colloidal particles or dissolved organic matter (DOM) can act as carriers to enhance the transport of contaminants in groundwater by reducing retardation effects. When either of these materials is present, the system can be treated as consisting of three phases: an aqueous phase, a carrier phase, and the stationary solid matrix phase.
M. Yavuz Corapcioglu, Shiyan Jiang
openaire   +1 more source

Colloid-Facilitated Plutonium Transport in Fractured Tuffaceous Rock

Environmental Science & Technology, 2017
Colloids have the potential to enhance the mobility of strongly sorbing radionuclide contaminants in groundwater at underground nuclear test sites. This study presents an experimental and numerical investigation of colloid-facilitated plutonium transport in fractured porous media to identify plutonium reactive transport processes.
Andrew Wolfsberg, Zhenxue Dai, Lin Zhu, Paul Reimus, Ting Xiao, Doug Ware   +5 more
openaire   +2 more sources

Colloid and Colloid-Facilitated Transport in Fractured Chalk

2020
Colloid and colloid-facilitated transport of contaminants with high affinity to the solid matrix is likely to occur in fractured rocks.
Emily Tran, Noam Weisbrod
openaire   +1 more source

Colloid-facilitated Transport of Heavy Metals in Lake Sediments

2022
<p>This work focuses on the development of a mechanistic Fe(hydr)oxide based (HFO) colloid-facilitated reactive transport model which identifies the impact of HFO colloids on the stability and mobility of heavy metals (Zn and Pb) in example subsurface benthic sediments of Lake Coeur d’Alene (LCdA), USA. Ferrihydrite colloids
Sema Sevinç Şengör, Kahraman Ünlü
openaire   +1 more source

Colloid-Facilitated Transport of Cesium in Variably Saturated Hanford Sediments

Environmental Science & Technology, 2005
Radioactive 137Cs has leaked from underground waste tanks into the vadose zone at the Hanford Reservation in south-central Washington State. There is concern that 137Cs, currently located in the vadose zone, can reach the groundwater. In this study, we investigated whether, and to what extent, colloidal particles can facilitate the transport of 137Cs ...
Gang, Chen, Markus, Flury, James B, Harsh, Peter C, Lichtner   +3 more
openaire   +2 more sources

Colloid-facilitated transport of radionuclides through fractured media

Journal of Contaminant Hydrology, 1993
Abstract The sorption of radionuclides on natural colloids may significantly modify their transport behaviour through fractured media, since radionuclides bound to colloids may not be subject to the important retardation mechanisms of matrix diffusion and sorption onto pore surfaces.
Smith, P.A., Degueldre, C.
openaire   +2 more sources

Incorporating Cross-Scale Insights Into Colloid-Facilitated Radionuclide Transport in Fractured Rocks: A Critical Review

Earth-Science Reviews
Driven by the global imperative for the geological disposal of high-level radioactive waste (HLW), notable progress has been made in predicting radionuclide transport within fractured rocks.
Funing Ma, Fangfei Cai
exaly   +2 more sources

Colloid-facilitated radionuclide transport in fractured porous rock

Waste Management, 1996
Numerical methods have been applied for the prediction of colloid-facilitated radionuclide transport through water-saturated fractured porous rock. The presence of colloids may enhance the transport of radionuclides in groundwater by reducing retardation effects. The colloids existing in the groundwater act as carriers, adsorbing radionuclides in their
I. Baek, W.W. Pitt
openaire   +1 more source

Assessment of the effect of kinetics on colloid facilitated radionuclide transport in porous media

Journal of Contaminant Hydrology, 1997
Abstract Binding of radionuclides to natural colloids can significantly alter their transport behaviour in porous media. Dependent on the interaction between radionuclides, colloids and the solid matrix, radionuclide transport may be enhanced or retarded as a result of the presence of colloids.
van de Weerd, H., Leijnse, A.
openaire   +1 more source