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Showing 1 to 14 of 14 for “"reactive barrier"”.
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Groundwater treatment technologies used to remove or contain radioactive contaminants found in the leachate plumes from waste storage sites at Chalk River Laboratories : a case study
… first technology is a funnel and gate permeable reactive barrier (PRB) to filter out strontium-90 from a contaminated groundwater plume and the second technology is a wall and curtain system installed near the site of an abandoned ammonium nitrate processing plant also used to remove strontium-90 …
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Use of electrokinetic and reactive barriers to treat heavy metals-contaminated soils
The combined use of electrokinetic (EK) and reactive barrier (RB) of transformed red mud (TRM) (a by-product of bauxite refinement for alumina production) for the remediation of low permeability contaminated soils by chromium and arsenic was investigated. The combination of EK with RB is a possible …
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Investigating the impact of microbial interactions with geologic media on geophysical properties
… associated with an in-situ biological permeable reactive barrier (PRB). The results suggest: (1) increases in electrolytic conductivity are consistent with increased concentrations of organic acids and biosurfactants; (2) mineral weathering promoted by organic acids causes increases in …
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Design Methodology for Permeable Reactive Barriers Combined With Monitored Natural Attenuation
Permeable reactive barrier (PRB) technology is increasingly considered for in situ treatment of contaminated groundwater; however, current design formulas for PRBs are limited and do not properly account for all major physical and attenuation processes driving remediation. This study focused on …
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Forecasting groundwater contaminant plume development using statistical and machine learning methods
… for accurate groundwater plume forecasting. A reactive transport model for a focus area downgradient of a zero-valent iron permeable reactive barrier was developed to generate a detailed, synthetic carbon tetrachloride concentration dataset that was input to two forecasting models, Prophet and …
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Reaction Rates For The Dehalogenation Of Trichloroethylene Using Various Types Of Zero-valent Iron
… extensively in the past decade as a subsurface reactive agent for the remediation of dense, nonaqueous-phase liquids (DNAPLs). Permeable reactive barrier walls (PRBW) have been installed at many sites around the country to treat contaminated plumes resulting from the presence of DNAPL pools. The …
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Barriere reattive permeabili a ferro zerovalente: modellazione dei fenomeni di trasporto e degradazione multicomponente
Le barriere reattive permeabili (Permeable Reactive Barrier – PRB) a ferro zero-valente rappresentano una delle metodologie di bonifica più recenti e promettenti per intervenire su acquiferi contaminati da sostanze organiche ed inorganiche e risultano essere una valida alternativa all’utilizzo del …
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Characteristics and Mechanisms of Heavy Metal and MTBE Adsorption on Zeolites and Applications in Permeable Reactive Barriers
… developed for groundwater remediation. Permeable reactive barriers (PRBs) filled with reactive media are one of the most promising in-situ technologies for groundwater remediation due to their low costs and suitability for the immobilization of multiple contaminants via adsorption, precipitation, …
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Investigations on mobility of carbon colloid supported nanoscale zero-valent iron (nZVI) for groundwater remediation
… for in situ installation of a permeable reactive barrier in the subsurface. Zerovalent iron (ZVI) is highly reactive with chlorinated hydrocarbons (CHCs) and renders them into less harmful substances. Application of nZVI instead of granular ZVI can increase rates of dechlorination of CHCs …
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Removal of nitrate from contaminated groundwater by floating alginate beads
… significant potentials in removing nitrate, as reactive nanoparticles can bind nitrate ions onto their surfaces, acting as both adsorbents and reactants to convert nitrate. Many studies have evaluated effectiveness of zero valent iron nanoparticles (NZVI) and magnetite nanoparticles (MNP) in …
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Rigenerazione mediante irradiamento a microonde di carboni attivi saturi da contaminanti emergenti
… in situ avviene mediante l’ausilio di una barriera reattiva permeabile (Permeable reactive barrier, PRB), in cui il materiale reattivo di riempimento più utilizzato sono i carboni attivi. Il nuovo sistema di trattamento proposto nel presente studio prevede l’accoppiamento della PRB con …
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In Situ Oxidation of 1,4-Dioxane with Persulfate-Based Oxidation Activated by Iron Minerals
… activation capacity is to use a permeable reactive barrier (PRB). However, the standard PRB, which employs iron filings as the reactive medium, are generally not effective for treating dioxane. The potential of the iron-filings-based PRB supplemented with persulfate–based oxidation for …
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Development of co-disposal methods for coal discards and fine waste for the prevention of acid mine drainage
… surfaces. Apart from providing a physical barrier and decreasing voids, FW typically have low sulphide content and high specific surface area that result in increased release rates of any acid neutralising minerals present in these waste materials. Co-disposal techniques thereby provide a …