Dependence of lumped mass transfer coefficient on scale and reactions kinetics for biologically enhanced NAPL dissolution

Chu, M.; Kitanidis, Peter K.; McCarty, Perry L.

doi:10.1016/j.advwatres.2006.05.016

Cited by 25 publications

(11 citation statements)

References 48 publications

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“…To sustain the reductive dechlorination process (in which chlorinated solvents serve as terminal electron acceptor under anaerobic conditions) a source of reducing equivalents (i.e., an electron donor) must be provided. The range of electron donors that may be used by dechlorinating microorganisms is generally quite limited and can include organic acid fermentation products (e.g., acetate, lactate, succinate, and formate) or may be limited to only H 2 (Christ et al 2005;Chu et al 2007;He et al 2002;Moe et al 2009). Chlorinated solvent respiring populations, thus, depend on the activity of fermentative organisms to convert complex organic materials into suitable electron donors in the absence of a readily available external supply (Bae et al 2006a, b;Sung et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Actinomyces naturae sp. nov., the first Actinomyces sp. isolated from a non-human or animal source

Rao

Rash

Nobre

et al. 2011

Antonie van Leeuwenhoek

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Three facultatively anaerobic, Gram-positive staining, rod-shaped, non-spore forming, flagellated bacterial strains, BL-75, BL-79(T) and BL-104, were isolated from chlorinated solvent-contaminated groundwater. Phylogenetic analysis based on 16S rRNA gene sequence comparisons showed them to represent a distinct lineage within the genus Actinomyces with sequence identities in the range of <88-95.4% with previously described Actinomyces species. The strains were oxidase and catalase negative. Nitrate was not reduced. Esculin was hydrolyzed. Growth occurred in the temperature range of 20-43°C (optimum 30-37°C) and pH range 4.5-9.0 (optimum pH 6.5). Substrates supporting growth included various mono-, di-, and tri-saccharides. The end products of glucose fermentation were acetate, lactate, succinate and formate. Fermentative growth was observed in the presence of near saturation concentrations of perchloroethene (PCE) and toluene and in the presence of 1,2-dichloroethane and 1,1,2-trichloroethane at concentrations up to at least 24.4 mM and 11.2 mM, respectively. The dominant cellular fatty acids when grown in peptone/yeast extract/glucose (PYG) medium were C(18:1) ω9c, C(16:0), and C(14:0). The peptidoglycan was found to contain the amino acids alanine, glutamic acid, lysine, and ornithine at approximate molar ratios of 1.7 Ala: 2.3 Glu: 1.3 Lys: 1.0 Orn. The cell wall sugars were found to include rhamnose and mannose. The polar lipids were found to include diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phospholipid (PL), phosphoglycolipids (PGL), and glycolipids (GL). The main respiratory quinone of strain BL-79(T) was MK-9(H(4)), with minor components MK-10(H(4)) and MK-8(H(4)). The DNA mol% G+C content of the type strain is 69.8%. On the basis of phylogenetic and phenotypic characteristics, these strains could be differentiated from previously described species of the genus Actinomyces. Strains BL-75, BL-79(T) and BL-104 are designated as a novel species, for which the name Actinomyces naturae sp. nov. is proposed. This is the first Actinomyces species isolated from an environmental rather than human or animal sources. The type strain of Actinomyces naturae is BL-79(T) (= CCUG 56698(T) = NRRL B-24670(T)).

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Section: Discussionmentioning

confidence: 99%

Actinomyces naturae sp. nov., the first Actinomyces sp. isolated from a non-human or animal source

Rao

Rash

Nobre

et al. 2011

Antonie van Leeuwenhoek

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“…In the paper by Chu et al [5], an analytical method for predicting the effective mass transfer coefficient for a residual NAPL domain is presented. The results show that the effective mass transfer coefficient depends upon the reaction kinetics and the system length scale.…”

Section: Upscaling Theory Development and Numerical Methodsmentioning

confidence: 99%

Biological processes in porous media: From the pore scale to the field

Wood¹,

Ford²

2007

Advances in Water Resources

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“…Diffusion is the dominant process for solute transport in the rock matrix blocks. Commonly reported geometries, slab‐, cylindrical‐, and spherical‐shaped rock matrix blocks (Rasmuson and Neretnieks ; Sudicky and Frind ; van Genuchten ) are used with a transient exchange rate between fractures and the rock matrix blocks (van Genuchten ; Haggerty and Gorelick ; Chu et al ; Sharifi Haddad et al ). Diffusion into the other geometries can be related to these shapes by the use of a shape factor (Neretnieks and Rasmuson ; van Genuchten ; Zimmerman and Bodvarsson ).…”

Section: Methodsmentioning

confidence: 99%

Characterization of Scale‐Dependent Dispersivity in Fractured Formations Through a Divergent Flow Tracer Test

Haddad

Hassanzadeh²,

Abedi

et al. 2014

Groundwater

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Scale-dependency of dispersivity has been reported from field tracer tests. We present a simple methodology for characterization of dispersivity as a linear function of scale around an injection well using divergent flow tracer test data conducted in fractured formations. Results show that the slope of this linear dispersivity function can be estimated using tracer concentration measurements in a monitoring well. The characterized dispersivity function has applications in modeling of field-scale transport processes in fractured formations.

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Dependence of lumped mass transfer coefficient on scale and reactions kinetics for biologically enhanced NAPL dissolution

Cited by 25 publications

References 48 publications

Actinomyces naturae sp. nov., the first Actinomyces sp. isolated from a non-human or animal source

Actinomyces naturae sp. nov., the first Actinomyces sp. isolated from a non-human or animal source

Biological processes in porous media: From the pore scale to the field

Characterization of Scale‐Dependent Dispersivity in Fractured Formations Through a Divergent Flow Tracer Test

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