Iron Barrier Walls for Chlorinated Solvent Remediation

Gillham, Robert W.; Vogan, John; Gui, Lai; Duchene, Michael; Son, Jennifer K.

doi:10.1007/978-1-4419-1401-9_16

Cited by 30 publications

(15 citation statements)

References 50 publications

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“…The model has an additional benefit in that it can be readily used for Monte Carlo probabilistic simulations of contaminant transport to account for uncertainties in groundwater velocity and various other fate and transport parameters. Because rather arbitrary safety factors are often involved for the design of a PRB based on experiences (Gillham et al, 2010), the features in the model that enable automatic estimation of kinetic parameters and probabilistic simulations have significant advantages over simple kinetic models.…”

Section: Introductionmentioning

confidence: 99%

Determination of rate constants and branching ratios for TCE degradation by zero-valent iron using a chain decay multispecies model

Hwang

Jeen

Sudicky

et al. 2015

Journal of Contaminant Hydrology

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Section: Introductionmentioning

confidence: 99%

Determination of rate constants and branching ratios for TCE degradation by zero-valent iron using a chain decay multispecies model

Hwang

Jeen

Sudicky

et al. 2015

Journal of Contaminant Hydrology

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“…The most significant use of ZVMs is permeable reactive barrier (PRB) containing granular zero-valent iron (ZVI), which relies on reduction, adsorption and co-precipitation to degrade and remove chlorinated solvents and other groundwater contaminants including Cr(VI) [15][16][17][18][19][20][21]. Although most studies on contaminant degradation by ZVMs focus on iron [16][17][18][19][20][21][22], other metals have also been reported, especially zero-valent zinc (ZVZ, Zn(0)) [15,[23][24][25], a stronger reductant than iron [26].…”

Section: Introductionmentioning

confidence: 99%

Rapid reduction of Cr(VI) coupling with efficient removal of total chromium in the coexistence of Zn(0) and silica gel

Guo

Liu

Dai

et al. 2012

Journal of Hazardous Materials

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“…The most important parameters include the residence time and the capture zone, which refers to the width of the barrier required to intercept the entire contamination plume [15]. The residence time is defined as the contact time between the contaminated groundwater and the reactive material required to achieve the treatment goals [17][18][19][20], or the time that the contaminated groundwater needs to pass through the reactive materials in a PRB [21,22]. A proper PRB design must assure that the residence time is sufficient to treat all contaminants in the polluted environment.…”

Section: Prb Designmentioning

confidence: 99%

Optimization Model for the Design of Multi-layered Permeable Reactive Barriers

Połoński

Pawluk

Rybka

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Permeable reactive barriers (PRBs) are employed as in situ groundwater remediation technology. The installation of PRBs is usually a major investment, where one of the biggest cost drivers are material costs. PRBs are barriers against contaminants moving under the natural gradient, however not against groundwater contaminants. The most common construction of a PRB is a single barrier, but in the case of contaminant mixtures a multi-layered construction, i.e. a combination of different reactive materials and removal processes, is required. The most important parameters for PRB design are dimensions. The barrier must be long enough to treat the entire width of the plume (dimension perpendicular to groundwater flow) and should extend to and be keyed into an impermeable layer. The problem is to determine the optimal thickness of a PRB, which should provide a residence time appropriate for reducing the concentration of contaminants to the desired effluent concentration. In PRBs, design is accomplished using numerical methods or simulators, which are useful to predict the scenarios and evaluate the resulting groundwater flow systems to specific site conditions. On the other hand, numerical methods are complicated and may have significant errors if the discretization is too coarse or is incorrectly aligned. This paper deals with a simple, conceptual model of a one-approach optimization method for multi-layered PRB design. Based on literature and laboratory test results (residence time, density and hydraulic coefficient), a selection of layers of reactive materials was determined. Considering the lowest cost of the reactive materials, the required thicknesses of activated carbon, zeolite and zero valent iron were calculated using two different algorithms. The simple model may be used for preliminary barrier design and cost calculations. Using the optimization model in a preliminary design stage, it is possible to reject the PRB concept and avoid losing time for the complicated analysis.

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Iron Barrier Walls for Chlorinated Solvent Remediation

Cited by 30 publications

References 50 publications

Determination of rate constants and branching ratios for TCE degradation by zero-valent iron using a chain decay multispecies model

Determination of rate constants and branching ratios for TCE degradation by zero-valent iron using a chain decay multispecies model

Rapid reduction of Cr(VI) coupling with efficient removal of total chromium in the coexistence of Zn(0) and silica gel

Optimization Model for the Design of Multi-layered Permeable Reactive Barriers

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