Field
Value
Language
dc.contributor.author
Pi, Kunfu
datacite.creator.affiliationIdentifier
-;https://ror.org/01aff2v68
en_US
datacite.creator.affiliation
Water Institute; University of Waterloo
en_US
datacite.creator.nameIdentifier
https://orcid.org/0000-0002-0798-0836
en_US
dc.contributor.author
Van Cappellen, Philippe
datacite.creator.affiliationIdentifier
-;https://ror.org/01aff2v68
en_US
datacite.creator.affiliation
Water Institute; University of Waterloo
en_US
datacite.creator.nameIdentifier
https://orcid.org/0000-0001-5476-0820
en_US
dc.contributor.author
Markelova, Ekaterina
datacite.creator.affiliationIdentifier
-;https://ror.org/01aff2v68
en_US
datacite.creator.affiliation
Water Institute; University of Waterloo
en_US
datacite.creator.nameIdentifier
https://orcid.org/0000-0002-6773-7571
en_US
dc.contributor.author
Zhang, Peng
datacite.creator.affiliationIdentifier
-;https://ror.org/01aff2v68
en_US
datacite.creator.affiliation
Water Institute; University of Waterloo
en_US
datacite.creator.nameIdentifier
en_US
dc.date.accessioned
2020-02-26T00:22:21Z
dc.date.available
2020-02-29T06:00:00Z
dc.date.issued
2020-02-29
dc.identifier.uri
https://www.frdr-dfdr.ca/repo/dataset/bdf3cbee-23c9-1202-0496-8d17fbcfe10c
dc.identifier.uri
https://doi.org/10.20383/101.0211
dc.description
The objective of this research is to see how the redox and pH conditions impact the oxidation of arsenic (As) in the presence of reduced and oxidized riboflavin species. Batch experiments using simple dark-brown glass reactors were conducted under anoxic (glovebox filled with 97-98% nitrogen and 2-3% hydrogen gases) and oxic (purified air introduced to the reactors through tubes) conditions and a range of pre-designed solution pH from 5.2 to 9.0. Variables collected in this research include the concentrations of arsenate (As(V)), arsenite (As(III)), total riboflavin, oxidized riboflavin and hydrogen peroxide (H2O2), all as a function of time. As(V) and As(III) concentrations in solution samples collected at different time points from 1 to 55 min were determined by hydrogen-generation atomic fluorescence spectrometry (HG-AFS, PS Analytical) with a detection limit of 0.5 μg/L. To measure As concentrations below this limit, anodic stripping voltammetry was performed using a 797 VA Computrace equipped with the TRACE Gold sensor (Metrohm, Application Bulletin 416/3). The total riboflavin concentrations were determined by measuring the fluorescence signal at the excitation/emission wavelength of 450/520 nm with a Flexstation-3 Multimode Reader (Molecular Devices) equipped with black/clear bottom 96-well microplates. The concentrations of oxidized riboflavin were measured by UV-vis spectrophotometry, with absorbance measured on a Flexstation-3 Multimode Reader (Molecular Devices). The detection limit of total riboflavin and oxidized riboflavin is 16 nmol/L. The concentrations of H2O2 were measured following the protocol of the commercial Fluorimetric Hydrogen Peroxide Assay Kit (Sigma-Aldrich). The fluorescence was measured at the excitation/emission wavelength of 540/590 nm, with a detection limit of 0.01 μmol/L. Additional details on the experimental setup for data collection can be found in the Supporting Information at https://doi.org/10.1021/acs.est.9b03188. The data in this research were collected in the Ecohydrology Research Group laboratories at the University of Waterloo. Funding for this work was provided by the Canada Excellence Research Chair in Ecohydrology,
en_US
dc.publisher
Federated Research Data Repository / dépôt fédéré de données de recherche
dc.rights
Creative Commons Public Domain Dedication (CC0 1.0)
en_US
dc.rights.uri
https://creativecommons.org/publicdomain/zero/1.0/
en_US
dc.subject
arsenic
en_US
dc.subject
oxidation
en_US
dc.subject
anoxic
en_US
dc.subject
pH
en_US
dc.subject
oxic
en_US
dc.subject
flavin
en_US
dc.subject
reactive
en_US
dc.title
Arsenic Oxidation by Flavin-Derived Reactive Species under Oxic and Anoxic Conditions
en_US
globus.shared_endpoint.name
f163c1b3-9c88-42f6-a7bb-5839ed6c4063
globus.shared_endpoint.path
/2/published/publication_211/
frdr.preservation.status
AIP generation and transfer successful
frdr.preservation.datetime
2020-02-25 18:31:54
datacite.publicationyear
2020
datacite.date.Collected
2017-10-01/2018-05-01
datacite.resourcetype
Dataset
en_US
datacite.relatedidentifier.Cites
https://doi.org/10.1021/acs.est.9b03188
datacite.fundingReference.funderName
Canada Excellence Research Chairs (CERC)
en_US
datacite.fundingReference.awardNumber
en_US
datacite.fundingReference.awardTitle
Canada Excellence Research Chair in Ecohydrology
en_US
frdr.crdc.code
RDF1040108
frdr.crdc.group_en
Chemical sciences
en_US
frdr.crdc.class_en
Analytical chemistry
en_US
frdr.crdc.field_en
Environmental chemistry (except atmospheric chemistry)
en_US
frdr.crdc.group_fr
Sciences chimiques
fr_CA
frdr.crdc.class_fr
Chimie analytique
fr_CA
frdr.crdc.field_fr
Chimie de l'environnement (sauf la chimie de l'atmosphère)
fr_CA
datacite.description.other
Item exited embargo and became publicly available on 2020-02-29
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