Modeling the Groundwater Flow of a 90Sr Plume Through a Permeable Reactive Barrier Installed at the Chalk River Laboratories, Chalk River, Ontario, Canada

2011 ◽  
pp. 719-730
Author(s):  
Jutta Hoppe ◽  
Jeff Bain ◽  
David Lee ◽  
Dale Hartwig ◽  
Sung-Wook Jeen ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Permeable Reactive Barrier ◽  
Reactive Barrier

scholarly journals Assessment of optimum width and longevity of a permeable reactive barrier installed in an acid sulfate soil terrain

2015 ◽  
Vol 52 (7) ◽  
pp. 999-1004 ◽  
Author(s):  
Udeshini Pathirage ◽  
Buddhima Indraratna
Keyword(s):  
Groundwater Flow ◽  
Residence Time ◽  
Cost Effective ◽  
Permeable Reactive Barriers ◽  
Permeable Reactive Barrier ◽  
Reactive Material ◽  
Reactive Barrier ◽  
Acidic Groundwater ◽  
Different Types ◽  
Optimum Width

Removal of contaminants from groundwater using permeable reactive barriers (PRBs) is a cost-effective and popular engineering solution used throughout the world. Dissolved pollutants in groundwater are removed through geochemical processes that make PRBs effective for different types of contaminants. In achieving this, it is vital to determine the optimum width of the PRB to allow adequate residence time within the barrier and to establish its longevity. For this purpose, both field monitoring and geochemical modelling were conducted for a trial PRB located in the Shoalhaven Floodplain, south of Wollongong in Australia. In this study, the optimum PRB width is evaluated numerically, based on the neutralization effectiveness, i.e., when acidic groundwater travels through the alkaline PRB. A model developed previously has been extended considering the residence time, reaction kinetics, mineral precipitation–induced reduction in porosity and hydraulic conductivity, influent concentrations of the contaminants, and groundwater flow velocity. Longevity of the PRB is determined with respect to groundwater flow rates and amount of reactive material consumed.

Design and Construction of Multi-Layered Permeable Reactive Barrier for Removing Radionuclides, Nitrate, and Perchlorate at Los Alamos National Laboratory

2003 ◽  
Author(s):  
P. Scott den Baars ◽  
John P. Kaszuba ◽  
Ted Cota ◽  
Jonathan Myers ◽  
Patrick Longmire ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Geochemical Modeling ◽  
National Laboratory ◽  
Permeable Reactive Barrier ◽  
Alamos National Laboratory ◽  
Los Alamos ◽  
Los Alamos National Laboratory ◽  
Reactive Barrier ◽  
Alluvial Groundwater ◽  
Design And Construction

Los Alamos National Laboratory (LANL) and Shaw Environmental, Inc. (Shaw) designed and constructed a multilayered permeable reactive barrier (PRB) to remove contaminants from shallow alluvial groundwater within Mortandad Canyon at LANL. This project was developed as a pilot project for LANL to conduct research and development and proof of concept and as such does not meet all identified target contaminant concentrations, but provides LANL data for future applications of the technology. Shaw worked jointly with LANL scientists in selecting the site, conducting a geotechnical and hydrogeologic investigation with contaminant characterization for waste disposal, preparing a design basis report, conducting geochemical and groundwater flow modeling, and preparing both conceptual and final detailed engineered designs. Geochemical modeling of the PRB multibarrier processes was conducted to predict influent and effluent contaminant concentrations and evaluate the potential for mineral precipitation and reduction of effective porosity in the barrier. A numerical model of groundwater flow was constructed to simulate hydrogeologic conditions in Mortandad Canyon and then used to simulate flow with the PRB in place. The Mortandad Canyon PRB is designed to remove radionuclides (americium-241, plutonium-238 and 239/240, and strontium-90), nitrate, and perchlorate from alluvial groundwater. The PRB consists of a funnel and gate constructed of sealable sheet piling driven through the alluvium and into the underlying volcanic tuff. The gate is designed as a braced cofferdam. The gate contains four sequential media cells consisting of lava rock gravel, mineral apatite (a calcium phosphate), biobarrier, and limestone gravel. The lava rock gravel will sorb colloids (sorbed with americium, plutonium, and strontium) from the alluvial groundwater. The apatite will remove soluble metals and radionuclides through sorption processes. The biobarrier serves as a host microorganisms that biodegrade nitrates and perchlorate. The limestone gravel functions to buffer the biobarrier effluent. In addition, there will also be sorption of soluble plutonium, americium, and metals within the biobarrier and limestone layer. A series of sampling ports and monitoring wells were installed within the reactive media cells. The purpose of the funnel is to direct shallow alluvial groundwater through the gate. This project was a joint effort between LANL and Shaw. The initial feasibility studies and bench scale treatability were conducted at LANL. The LANL laboratory data was used as the basis for design criteria. The hydrogeologic and geochemical modeling, engineering design, and construction were performed by Shaw with LANL guidance and input.

scholarly journals Evaluation of the Efficiency of a Clay Permeable Reactive Barrier for the Remediation of Groundwater Contaminated with 137Cs

2017 ◽  
Vol 17 ◽  
pp. 444-447 ◽  
Author(s):  
Elena Torres ◽  
Paloma Gómez ◽  
Antonio Garralón ◽  
Belén Buil ◽  
María J. Turrero ◽  
...  
Keyword(s):  
Permeable Reactive Barrier ◽  
Reactive Barrier

Hydraulic performance of a permeable reactive barrier at Casey Station, Antarctica

Chemosphere ◽  
2014 ◽  
Vol 117 ◽  
pp. 223-231 ◽  
Author(s):  
K.A. Mumford ◽  
J.L. Rayner ◽  
I. Snape ◽  
G.W. Stevens
Keyword(s):  
Hydraulic Performance ◽  
Permeable Reactive Barrier ◽  
Reactive Barrier ◽  
Casey Station

Removal of ammoniacal nitrogen from contaminated groundwater using waste foundry sand in the permeable reactive barrier

2021 ◽  
Vol 230 ◽  
pp. 227-239
Author(s):  
Ayad A.H. Faisal ◽  
Laith A. Naji ◽  
Anis Ahmad Chaudhary ◽  
B. Saleh
Keyword(s):  
Permeable Reactive Barrier ◽  
Contaminated Groundwater ◽  
Ammoniacal Nitrogen ◽  
Foundry Sand ◽  
Reactive Barrier ◽  
Waste Foundry Sand

Lead (II) Removal from Contaminated Soils by Electrokinetic Remediation Coupled with Modified Eggshell Waste

2018 ◽  
Vol 777 ◽  
pp. 256-261 ◽  
Author(s):  
André Ribeiro ◽  
André Mota ◽  
Margarida Soares ◽  
Carlos Castro ◽  
Jorge Araújo ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Removal Rate ◽  
Electrokinetic Remediation ◽  
Permeable Reactive Barrier ◽  
Inorganic Contaminants ◽  
Reactive Barrier ◽  
Eggshell Waste ◽  
Inorganic Fraction ◽  
Maximum Removal

Electrokinetic remediation deserves particular attention in soil treatment due to its peculiar advantages, including the capability of treating fine and low permeability materials, and achieving consolidation, dewatering and removal of salts and inorganic contaminants like heavy metals in a single stage. In this study, the remediation of artificially lead (II) contaminated soil by electrokinetic process, coupled with Eggshell Inorganic Fraction Powder (EGGIF) permeable reactive barrier (PRB), was investigated. An electric field of 2 V cm-1was applied and was used an EGGIF/soil ratio of 30 g kg-1 of contaminated soil for the preparation of the permeable reactive barrier (PRB) in each test. It was obtained high removal rates of lead in both experiments, especially near the cathode. In the normalized distance to cathode of 0.2 it was achieved a maximum removal rate of lead (II) of 68, 78 and 83% in initial lead (II) concentration of 500 mg-1, 200 mg-1 and 100 mg-1, respectively. EGGIF (Eggshell Inorganic Fraction) proved that can be used as permeable reactive barrier (PRB) since in all the performed tests were achieved adsorptions yields higher than 90%.

In situ remediation of tetrachloroethylene and its intermediates in groundwater using an anaerobic/aerobic permeable reactive barrier

2017 ◽  
Vol 24 (34) ◽  
pp. 26615-26622 ◽  
Author(s):  
SheJiang Liu ◽  
QinMing Yang ◽  
YongKui Yang ◽  
Hui Ding ◽  
Yun Qi
Keyword(s):  
Permeable Reactive Barrier ◽  
In Situ Remediation ◽  
Reactive Barrier
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