scholarly journals A Combined Site-Specific Metals Sorption and Transport Model for Intact Soil Columns

2013 ◽  
Vol 12 (4) ◽  
pp. vzj2012.0152 ◽  
Author(s):  
Susana Serrano ◽  
Dimitri Vlassopoulos ◽  
Fernando Garrido ◽  
Peggy A. O'Day
Keyword(s):  
Transport Model ◽  
Soil Columns ◽  
Site Specific ◽  
Intact Soil

Transport of organochlorine pesticides in soil columns enhanced by dissolved organic carbon

1997 ◽  
Vol 35 (7) ◽  
pp. 139-145 ◽  
Author(s):  
Jiann-Yuan Ding ◽  
Shian-Chee Wu
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Organochlorine Pesticides ◽  
Transport Model ◽  
Phase Model ◽  
Soil Columns ◽  
Two Phase ◽  
Three Phase ◽  
Phase Transport ◽  
Remediation Of Soil

The objective of this study is to quantify the effects of humic acid solution infiltration on the transport of organochlorine pesticides (OCPs) in soil columns using a three-phase transport model. From experimental results, it is found that the dissolved organic carbon enhances the transport of OCPs in the soil columns. In the OCPs-only column, the concentration profiles of OCPs can be simulated well using a two-phase transport model with numerical method or analytical solution. In the OCPs-DOC column, the migrations of aldrin, DDT and its daughter compounds are faster than those in the OCPs-only column. The simulation with the three-phase model is more accurate than that with the two-phase model. In addition, significant decrease of the fluid pore velocities of the OCPs-DOC column was found. When DOC leachate is applied for remediation of soil or groundwater pollution, the decrease of mean pore velocities will be a crucial affecting factor.

scholarly journals Lumped Approach for Reactive Transport of Organic Compound Mixtures through Simulated Aquifer Sands in Lab-Scale Column Tests

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3103
Author(s):  
Jin Chul Joo ◽  
Hee Sun Moon ◽  
Sun Woo Chang
Keyword(s):  
Organic Compounds ◽  
Reactive Transport ◽  
Transport Model ◽  
A Priori ◽  
Water Concentration ◽  
Organic Carbon Content ◽  
Soil Columns ◽  
Organic Mixtures ◽  
Reasonable Prediction ◽  
Sorption Parameters

The feasibility of the lumped approach for reactive transport of 12 organic compounds in mixtures through simulated aquifer sands with different organic carbon content (foc) within soil columns was evaluated. From direct measurements of effluent samples and temporal and spatial pore-water concentration profiles within soil columns, 12 organic compounds in mixtures were sorbed to different extents due to the different dependence of sorption on foc. Considering the tradeoff between accuracy and simplicity, four, five, and six pseudocompounds were determined for simulated aquifer sands with foc of 0.006%, 0.051%, and 0.221%, respectively, to approximate the reactive transport of 12 organic compounds in mixtures. Each pseudocompound presented obviously different reactive transport behavior in terms of both sorption capacity and nonlinearity, indicating that each pseudocompound contained components with relatively similar sorption capacities and nonlinearity. Similar to the results from batch equilibrium sorption tests, log Koc can be used as the a priori grouping criterion, although the relative contributions of different forces to the overall sorption may differ for different composition of organic mixtures and foc values of aquifer sands. Finally, the assignment of the Freundlich sorption parameters of pseudocompounds using averages of Freundlich sorption parameters of their components led to reasonable prediction for reactive transport of organic compounds in mixtures through the soil columns. Further study is warranted to evaluate the effective coupling between lumped approach and reactive transport model using complex multicomponent mixtures within heterogeneous subsurface systems.

A Solute Transport Model for the Acid Leaching of Copper in Soil Columns

1994 ◽  
Vol 58 (3) ◽  
pp. 678-686 ◽  
Author(s):  
Juan Pablo Montero ◽  
José Francisco Muñoz ◽  
Roberto Abeliuk ◽  
Michel Vauclin
Keyword(s):  
Solute Transport ◽  
Transport Model ◽  
Acid Leaching ◽  
Soil Columns

Preferential Solute Flow in Intact Soil Columns Measured by SPECT Scanning

2000 ◽  
Vol 64 (2) ◽  
pp. 469-477 ◽  
Author(s):  
Johan Perret ◽  
S. O. Prasher ◽  
A. Kantzas ◽  
K. Hamilton ◽  
C. Langford
Keyword(s):  
Soil Columns ◽  
Solute Flow ◽  
Intact Soil

Modeling Sorption Behavior of Atrazine on Intact Soil Columns

1999 ◽  
Vol 125 (4) ◽  
pp. 212-222 ◽  
Author(s):  
Jinhe Li ◽  
Shiv O. Prasher ◽  
Roberto S. Clemente ◽  
William D. Reynolds ◽  
Ward N. Smith ◽  
...  
Keyword(s):  
Sorption Behavior ◽  
Soil Columns ◽  
Intact Soil

Adsorption and transport of imazapyr through intact soil columns taken from two soils under two tillage systems

Geoderma ◽  
2015 ◽  
Vol 251-252 ◽  
pp. 1-9 ◽  
Author(s):  
Carolina Porfiri ◽  
Jorgelina C. Montoya ◽  
William C. Koskinen ◽  
Mariela P. Azcarate
Keyword(s):  
Soil Columns ◽  
Tillage Systems ◽  
Intact Soil

Effects of bio-subsoilers on subsoil pore-system functionality: Case study with intact soil columns

Geoderma ◽  
2021 ◽  
Vol 385 ◽  
pp. 114897
Author(s):  
Mansonia Pulido-Moncada ◽  
Sheela Katuwal ◽  
Jens Bjerggård Kristensen ◽  
Lars J. Munkholm
Keyword(s):  
Soil Columns ◽  
Pore System ◽  
Intact Soil
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