Impact of Solids Formation and Gas Production on the Permeability of ZVI PRBs

Henderson, Andrew; Demond, Avery H.

doi:10.1061/(asce)ee.1943-7870.0000383

Cited by 65 publications

(65 citation statements)

References 32 publications

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“…For the discussion herein, however, it is sufficient to consider that purposefully distinguishing between 'reactivity' and 'efficiency' would have impacted the experimental design and/or enabled a stronger discussion with the presented material. filters is still poorly understood [16]. The present work and related studies [59][60][61] suggest that this issue was even not properly addressed.…”

Section: Efficiency and Reactivity Of Fementioning

confidence: 77%

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Testing the suitability of metallic iron for environmental remediation: Discoloration of methylene blue in column studies

Miyajima²,

Noubactep³

et al. 2013

Chemical Engineering Journal

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A new method to correlate intrinsic reactivity and treatability efficiency of metallic iron ( Metallic iron (Fe 0 ) is a reactive material currently used for environmental remediation and safe drinking water provision [1][2][3][4][5][6][7]. Available Fe 0 materials are obtained from various sources [8][9][10][11][12] and are supposed to satisfy design expectations [7,[13][14][15][16][17]. However, there is no standard method to access the suitability of Fe 0 materials for individual applications. As a rule, used materials are characterized: (i) by selected physical and chemical parameters (e.g.elemental composition, particle size, surface area) and (ii) for their ability to remove the specific species of interest (efficiency in treatability studies) [11,18,19]. However, each reactive material should be primarily characterized by its intrinsic reactivity.The 'intrinsic reactivity' is a material-dependent but system-independent qualitative trend.The 'removal efficiency' or 'treatability efficiency' is a system-dependent quantifiable

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Section: Efficiency and Reactivity Of Fementioning

confidence: 77%

“…Available Fe 0 materials are obtained from various sources [8][9][10][11][12] and are supposed to satisfy design expectations [7,[13][14][15][16][17]. However, there is no standard method to access the suitability of Fe 0 materials for individual applications.…”

Section: Introductionmentioning

confidence: 99%

Testing the suitability of metallic iron for environmental remediation: Discoloration of methylene blue in column studies

Miyajima²,

Noubactep³

et al. 2013

Chemical Engineering Journal

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“…Fe 0 is also a very efficient material for above-ground wastewater treatment and safe dinking water provision [7][8][9]. New Moreover, despite 20 years of intensive research, the question as to whether iron should be used alone or mixed to a cost efficient material is yet to be properly addressed [14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Impact of Fe0 amendment on methylene blue discoloration by sand columns

Miyajima¹,

Noubactep²

2013

Chemical Engineering Journal

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“…One major challenge for the Fe 0 filtration technology has been to properly consider the contribution of (volumetric expansive nature of) iron corrosion to permeability loss [16,[33][34][35]75]. That is coupling ∆d to the diminution of the porosity (Challenge 1).…”

Section: An Alternative Approachmentioning

confidence: 99%

“…An overview of the Fe 0 filtration literature reveals conflicting information regarding the causes of permeability loss [7,75]. There is always a discrepancy between the observed and the predicted porosity loss; the actual porosity loss being higher than that predicted [75].…”

Section: The Shortcomings Of Current Modeling Effortsmentioning

confidence: 99%

Predicting the Hydraulic Conductivity of Metallic Iron Filters: Modeling Gone Astray

Noubactep

2016

Water

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Abstract:Since its introduction about 25 years ago, metallic iron (Fe 0 ) has shown its potential as the key component of reactive filtration systems for contaminant removal in polluted waters. Technical applications of such systems can be enhanced by numerical simulation of a filter design to improve, e.g., the service time or the minimum permeability of a prospected system to warrant the required output water quality. This communication discusses the relevant input quantities into such a simulation model, illustrates the possible simplifications and identifies the lack of relevant thermodynamic and kinetic data. As a result, necessary steps are outlined that may improve the numerical simulation and, consequently, the technical design of Fe 0 filters. Following a general overview on the key reactions in a Fe 0 system, the importance of iron corrosion kinetics is illustrated. Iron corrosion kinetics, expressed as a rate constant k iron , determines both the removal rate of contaminants and the average permeability loss of the filter system. While the relevance of a reasonable estimate of k iron is thus obvious, information is scarce. As a conclusion, systematic experiments for the determination of k iron values are suggested to improve the database of this key input parameter to Fe 0 filters.

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Impact of Solids Formation and Gas Production on the Permeability of ZVI PRBs

Cited by 65 publications

References 32 publications

Testing the suitability of metallic iron for environmental remediation: Discoloration of methylene blue in column studies

Testing the suitability of metallic iron for environmental remediation: Discoloration of methylene blue in column studies

Impact of Fe0 amendment on methylene blue discoloration by sand columns

Predicting the Hydraulic Conductivity of Metallic Iron Filters: Modeling Gone Astray

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