Publication:
Nitrate transport in a fracture-skin-matrix system under non-isothermal conditions

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cris.virtual.author-orcid0000-0003-3833-5482
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cris.virtual.departmentIndian Institute of Technology, Madras
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cris.virtualsource.author-orcid61f8e713-ace9-44d8-a7e8-f1b49d750ac6
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cris.virtualsource.department61f8e713-ace9-44d8-a7e8-f1b49d750ac6
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dc.contributor.authorLawrence, Jino
dc.contributor.authorAlagarsamy, Vanav Kumar
dc.contributor.authorMohanadhas, Berlin
dc.contributor.authorNatarajan, Narayanan
dc.contributor.authorVasudevan, Mangottiri
dc.contributor.authorSuresh Kumar Govindarajan
dc.date.accessioned2023-09-19T13:22:36Z
dc.date.available2023-09-19T13:22:36Z
dc.date.issued01-02-2023
dc.description.abstractSubsurface leaching of agricultural runoff has been identified to pose a serious hazard to the soil–water ecosystem and human health, mostly due to the associated contamination with nitrate. Our understanding of the nature of contaminant spread in the vadose and aquifer zones has been improved from recent mechanistic models on the flow and transport of contaminants through fractured porous media. The present study aims to explore the impacts of skin formation in a fracture–matrix aquifer system onto the nitrogen species transport under non-isothermal settings using numerical modeling. A finite-difference scheme was employed to capture the nitrogen concentration profile and kinetics of transformation by solving the derived partial differential equations. The results show evidence of an additional mass transfer from fracture to skin so as to reduce the migration of nitrogen species (NO3-N and N2) at the fracture–matrix interface thereby reducing the peak concentration of N2 by nearly 1.5 times in fracture after denitrification. Although the thermal conductivity of the rock matrix has a direct impact on the temperature distribution in fracture–skin–matrix profiles, the presence of skin has a cooling effect for a high-temperature influent (45 °C), which also deteriorates the propagation of organic N2 and NO3-N, within the fracture. An increase in the temperature coefficient of skin has resulted in an apparent reduction in nitrogen species migration, indicating the thermo-chemical feasibility of an intermediate skin favoring the mass transfer processes. The findings of this study can be extended toward realistic estimation of groundwater contamination risks and for the design of biological filters for in situ remediation.
dc.identifier.doi10.1007/s11356-022-23428-4
dc.identifier.issn9441344
dc.identifier.pmid36205874
dc.identifier.scopus2-s2.0-85139506155
dc.identifier.urihttps://apicris.irins.org/handle/IITM2023/16373
dc.relation.ispartofseriesEnvironmental Science and Pollution Research
dc.sourceEnvironmental Science and Pollution Research
dc.subjectDenitrification
dc.subjectFracture skin
dc.subjectNitrate transport
dc.subjectNon-isothermal mass transfer
dc.subjectNumerical model
dc.titleNitrate transport in a fracture-skin-matrix system under non-isothermal conditions
dc.typeJournal
dspace.entity.typePublication
oaire.citation.endPage18112
oaire.citation.issue7
oaire.citation.startPage18091
oaire.citation.volume30
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oairecerif.author.affiliationIndian Institute of Technology, Madras
person.affiliation.cityYupia
person.affiliation.cityPollachi
person.affiliation.citySathyamangalam
person.affiliation.cityChennai
person.affiliation.cityChennai
person.affiliation.id60107380
person.affiliation.id60107222
person.affiliation.id60072227
person.affiliation.id60025757
person.affiliation.id60023330
person.affiliation.nameNational Institute of Technology, Arunachal Pradesh
person.affiliation.nameDr.Mahalingam College of Engineering &amp
person.affiliation.nameTechnology
person.affiliation.nameBannari Amman Institute of Technology
person.affiliation.nameIndian Institute of Technology Madras
person.affiliation.nameSathyabama Institute of Science and Technology
person.identifier.scopus-author-id57800015600
person.identifier.scopus-author-id57920077600
person.identifier.scopus-author-id57219115912
person.identifier.scopus-author-id57193261612
person.identifier.scopus-author-id57197943410
person.identifier.scopus-author-id57217596517
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