Seasonal variations in proton binding characteristics of dissolved organic matter isolated from the southwest baltic sea
| dc.contributor.author | Lodeiro, Pablo | |
| dc.contributor.author | Rey Castro, Carlos | |
| dc.contributor.author | David, Calin | |
| dc.contributor.author | Puy Llorens, Jaume | |
| dc.contributor.author | Achterberg, Eric P. | |
| dc.contributor.author | Gledhill, Martha | |
| dc.date.accessioned | 2022-03-02T10:07:57Z | |
| dc.date.available | 2022-03-02T10:07:57Z | |
| dc.date.issued | 2021 | |
| dc.description.abstract | The physicochemical characteristics of dissolved organic matter (DOM) strongly influence its interactions with inorganic species such as protons and trace elements in natural waters. We collected water samples at Boknis Eck, a time series station in the Baltic Sea with a low exposure to freshwater inputs, to investigate how seasonal fluctuations impact the proton binding properties of the isolated DOM. We used potentiometric titrations to assess the binding properties of solid-phase extracted DOM (SPE–DOM) over a seasonal cycle. We report and critically analyze the first NICA parameters estimates of carboxylic-like and phenolic-like sites for brackish water SPE–DOM. The total amount of functional groups (QmaxH,tot) showed no seasonal fluctuations and an average value of 136 ± 5.2 mmol·mol C–1. The average proton affinity (logKH) and binding site heterogeneity (m) showed a relatively minor variability for samples obtained between April and September, when the water remained stratified. These results contribute to a better understanding of the ion binding characteristics of DOM in natural brackish waters. | ca_ES |
| dc.description.sponsorship | The authors gratefully acknowledge support from the Deutsche Forschungsgemeinschaft (Project GL 807/2), the German Helmholtz Association, and Grants PID2019-107033GB-C21 and PID2020-117910GB-C21 funded by MCIN/AEI/10.13039/501100011033. P.L. also acknowledges current support from the Ministerio de Ciencia, Innovación y Universidades of Spain and University of Lleida (Beatriz Galindo Senior award number BG20/00104). | ca_ES |
| dc.identifier.doi | https://doi.org/10.1021/acs.est.1c04773 | |
| dc.identifier.idgrec | 031800 | |
| dc.identifier.issn | 16215−16223 | |
| dc.identifier.uri | http://hdl.handle.net/10459.1/73139 | |
| dc.language.iso | eng | ca_ES |
| dc.publisher | ACS publications | ca_ES |
| dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107033GB-C21/ES/CAPTADORES PASIVOS (DGT, DMT) Y TECNICAS ELECTROANALITICAS PARA ESPECIACION Y DISPONIBILIDAD EN AGUAS NATURALES Y SUELOS: MODELIZACION, DESARROLLO, APLICACION E INTERPRETACION/ | ca_ES |
| dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117910GB-C21/ES/EL PAPEL DE LA MATERIA ORGANICA DISUELTA TERRESTRE, FLUVIAL Y MARINA EN EL ENLACE, TRANSPORTE Y BIODISPONIBILIDAD DE NUTRIENTES%2FCONTAMINANTES CLAVE./ | |
| dc.relation.isformatof | Reproducció del document publicat a https://doi.org/10.1021/acs.est.1c04773 | ca_ES |
| dc.relation.ispartof | Environmental Science & Technology, 2021, vol. 55, núm. 23, p. 16215-16223 | ca_ES |
| dc.rights | cc-by (c) Lodeiro, et al., 2021 | ca_ES |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_ES |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
| dc.subject | Solid-phase extraction | ca_ES |
| dc.subject | DOM | ca_ES |
| dc.subject | Proton binding | ca_ES |
| dc.subject | Acid−base | ca_ES |
| dc.subject | Log KH | ca_ES |
| dc.subject | Solid-phase extraction | ca_ES |
| dc.subject | Nonideal competitive adsorption (NICA) | ca_ES |
| dc.title | Seasonal variations in proton binding characteristics of dissolved organic matter isolated from the southwest baltic sea | ca_ES |
| dc.type | info:eu-repo/semantics/article | ca_ES |
| dc.type.version | info:eu-repo/semantics/publishedVersion | ca_ES |