Ultrasound-assisted activation of zero-valent magnesium for nitrate denitrification: Identification of reaction by-products and pathways

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dc.authoridAPAYDIN, OMER/0000-0002-7909-2862
dc.contributor.authorIleri, Burcu
dc.contributor.authorAyyildiz, Onder
dc.contributor.authorApaydin, Omer
dc.date.accessioned2025-01-27T20:11:47Z
dc.date.available2025-01-27T20:11:47Z
dc.date.issued2015
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractZero-valent magnesium (Mg-0) was activated by ultrasound (US) in an aim to promote its potential use in water treatment without pH control. In this context, nitrate reduction was studied at batch conditions using various doses of magnesium powder and ultrasound power. While neither ultrasound nor zero-valent magnesium alone was effective for reducing nitrate in water, their combination removed up to 90% of 50 mg/L NO3-N within 60 min. The rate of nitrate reduction by US/Mg-0 enhanced with increasing ultrasonic power and magnesium dose. Nitrogen gas (N-2) and nitrite (NO2-) were detected as the major reduction by-products, while magnesium hydroxide Mg(OH)(2) and hydroxide ions (OH-) were identified as the main oxidation products. The results from SEM-EDS measurements revealed that the surface oxide level decreased significantly when the samples of Mg particles were exposed to ultrasonic treatment. The surface passivation of magnesium particles was successfully minimized by mechanical forces of ultrasound, which in turn paved the way to sustain the catalyst activity toward nitrate reduction. (C) 2015 Elsevier B.V. All rights reserved.
dc.description.sponsorshipScientific and Technical Research Council of Turkey (TUBITAK) [112Y254]; Yildiz Technical University [2013-05-02-DOP03]
dc.description.sponsorshipThis study was funded by the Scientific and Technical Research Council of Turkey (TUBITAK) (Project No: 112Y254) and Yildiz Technical University (Project No: 2013-05-02-DOP03).
dc.identifier.doi10.1016/j.jhazmat.2015.03.004
dc.identifier.endpage8
dc.identifier.issn0304-3894
dc.identifier.issn1873-3336
dc.identifier.pmid25781370
dc.identifier.scopus2-s2.0-84924798362
dc.identifier.scopusqualityQ1
dc.identifier.startpage1
dc.identifier.urihttps://doi.org/10.1016/j.jhazmat.2015.03.004
dc.identifier.urihttps://hdl.handle.net/20.500.12428/20721
dc.identifier.volume292
dc.identifier.wosWOS:000353740500001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherElsevier Science Bv
dc.relation.ispartofJournal of Hazardous Materials
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectUltrasound
dc.subjectZero-valent magnesium
dc.subjectNitrate
dc.subjectDenitrification
dc.subjectSurface activation
dc.titleUltrasound-assisted activation of zero-valent magnesium for nitrate denitrification: Identification of reaction by-products and pathways
dc.typeArticle

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