Natural denitrification in the Kakamigahara groundwater basin, Gifu prefecture, central Japan

Mohamed, Mohamed A. A.; Terao, Hiromitsu; Suzuki, Ryo; Babiker, Insaf S.; Ohta, Keiichi; Kaori, Koyama; Kato, Koji

doi:10.1016/s0048-9697(02)00536-3

Cited by 45 publications

(9 citation statements)

References 16 publications

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“…However, bioremediation of environmental pollution may be achieved by denitrification. For example, nitrate contamination in groundwater could be reduced by natural denitrification in aquifers (Mohamed et al. 2003).…”

Section: Introductionmentioning

confidence: 99%

Identification of denitrifying rhizobacteria from bentgrass and bermudagrass golf greens

Wang

Skipper

2004

J Appl Microbiol

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Aims: As high rates of nitrogen fertilization are used in turfgrass management, there is a great potential for nitrogen loss. Research on identification of denitrifiers in turfgrass has been limited. Therefore, the aim was to identify denitrifier species and genes from turfgrass roots. Methods and Results: Rhizobacteria were isolated from roots of bentgrass and bermudagrass in sand-based United States Golf Association (USGA) golf greens and used for denitrification biochemical analysis. Seventeen per cent (34 isolates) were identified as denitrifiers, 47% were classified as nitrate-reducers and 36% were nondenitrifiers. Identification of species of the denitrifiers was performed by chromatography fatty acid methyl ester (GC-FAME) and16S rDNA analyses. Bacillus and Pseudomonas were the major turfgrass denitrifiers. The two methods showed a 60% agreement at the genus level. Nitrite reductase genes nirK and nirS were detected in 74 and 15% of the denitrifiers, respectively, but not in nondenitrifiers. The nosZ gene encoding nitrous oxide reductase was detected in all the denitrifiers, but also in some nondenitrifiers. Conclusions: To our knowledge, this is the first report for identification of denitrifiers and denitrification-related genes associated with turfgrass roots. Significance and Impact of the Study: These results provide valuable data for future denitrification studies that seek to improve turfgrass nitrogen management for maximum efficiency.

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Section: Introductionmentioning

confidence: 99%

Identification of denitrifying rhizobacteria from bentgrass and bermudagrass golf greens

Wang

Skipper

2004

J Appl Microbiol

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“…Denitrifying microorganisms are ubiquitous in nature, whether be it surface water (Bernot et al 2003), groundwater (Jacinthe et al 1998;Vogel et al 1981;DeSimone and Howes 1998;Smith and Duff 1988;Peterson et al 2013;Mohamed et al 2003), soil, or at great depths below ground levels (Morris et al 1988). Denitrifying bacteria are mostly facultative anaerobic heterotrophs and obtain their energy from the oxidation of organic substances (Torrento et al 2011).…”

Section: Solid-phase Denitrification Processmentioning

confidence: 99%

Remediation of nitrate-contaminated water by solid-phase denitrification process—a review

Ashok

Hait

2015

Environ Sci Pollut Res

124

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The paper presents a compilation of various autotrophic and heterotrophic ways of solid-phase denitrification. It covers a complete understanding of various pathways followed during denitrification process. The paper gives a brief review on various governing factors on which the process depends. It focuses mainly on the solid-phase denitrification process, its applicability, efficiency, and disadvantages associated. It presents a critical review on various methodologies associated with denitrification process reported in past years. A comparative study has also been carried out to have a better understanding of advantages and disadvantages of a particular method. We summarize the various organic and inorganic substances and various techniques that have been used for enhancing denitrification process and suggest possible gaps in the research areas whi'ch are worthy of future research.

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“…Natural denitrification in the Kakamigahara Basin in Central Japan was studied by Mohamed et al (2003). Based on reduced concentrations along the flow path and changes in the isotopic fractionation, the authors concluded that denitrification is continuously removing nitrate.…”

Section: Nutrientsmentioning

confidence: 99%

Groundwater Quality

Lange¹,

Lange²

2004

Water Environment Research

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This review covers studies related to groundwater quality and has been arranged by contaminant type. For each contaminant the quantity, fate and transport, remediation measures, and models published over the past year are presented. FLOWA methodology for stochastic management of groundwater flow and quality was presented by Bakr et al (2003) using coupled flow and mass transport equations. Using a multi-objective formulation of the management problem and analysis of its results, it was possible to identify an appropriate remediation scheme. A mathematical model for solute transport, using a laplace transform power series, was used to describe solute transport in a convergent flow field with scale-dependent dispersion (Chen et al, 2003a). The model results showed good agreement with field data. Woods et al (2003) showed that numerical error in groundwater transport models could lead to quantitative and qualitative changes in behavior. The authors confirmed this finding by showing 2190 the Elder problem to be extremely sensitive to the simulation method used. Nonreactive transport at the boarder of various asymmetrical cavities was modeled by Selvadurai (2003). Analytical results were developed for time-and spacedependent distribution of contaminant concentration in porous media, which can also exhibit natural attenuation.A block-effective macrodispersion model was used to simulate transport in heterogeneous aquifers (Rubin et al, 2003). The closed-form analytical results were attained very quickly. Das and Nassehi (2003) modeled contaminant mobility in the subsurface domains with multiple free/porous interfaces. The authors attempted to remove the limitations of previous mathematical models by imposing multiple pervious boundaries. The effects local-scale heterogeneity and non-linear, kinetically limited sorption phenomena on contaminant transport in porous media was discussed by Johnson et al (2003a). The results indicated that local-scale physical heterogeneity controlled the non-ideal transport behavior of trichloroethene and non-ideal sorption was of secondary importance. The flow behavior of liquid carbon tetrachloride in unsaturated heterogeneous porous media was studied by Oostrom et al (2003). The results indicate that nonspreading behavior of NAPLs should be implemented in simulators to account for the formation of residual saturations. A dependence of DNALP behavior on saturation history was demonstrated by Gerhard and Kueper (2003) using laboratory scale testing. Laboratory and numerical modeling investigations of flow and transport near a seepage face boundary was conducted by Simpson et al (2003a). The 2191 authors concluded that the use of the Dupuit approximations might introduce error into the analysis of localized solute transport near the seepage face.Anderson applied an approximation that replaced the leaky boundary with an equivalent layer that had a one-dimensional resistance to flow. The solution compared favorably with the commonly utilized Dupuit approximation.A model for unsaturated flow...

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Natural denitrification in the Kakamigahara groundwater basin, Gifu prefecture, central Japan

Cited by 45 publications

References 16 publications

Identification of denitrifying rhizobacteria from bentgrass and bermudagrass golf greens

Identification of denitrifying rhizobacteria from bentgrass and bermudagrass golf greens

Remediation of nitrate-contaminated water by solid-phase denitrification process—a review

Groundwater Quality

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