Universitat de Lleida
    • English
    • català
    • español
  • español 
    • English
    • català
    • español
  • Iniciar sesión
Repositori Obert UdL
Ver ítem 
  •   Inicio
  • Recerca
  • Química
  • Articles publicats (Química)
  • Ver ítem
  •   Inicio
  • Recerca
  • Química
  • Articles publicats (Química)
  • Ver ítem
JavaScript is disabled for your browser. Some features of this site may not work without it.

Metal (Pb, Cd, and Zn) Binding to Diverse Organic Matter Samples and Implications for Speciation Modeling

Thumbnail
Ver/Abrir
027216 (1.075Mb)
Fecha de publicación
2018
Autor/a
Chen, Weibin
Guéguen, Céline
Smith, D. Scott
Galceran i Nogués, Josep
Puy Llorens, Jaume
Companys Ferran, Encarnació
Cita recomendada
Chen, Weibin; Guéguen, Céline; Smith, D. Scott; Galceran i Nogués, Josep; Puy Llorens, Jaume; Companys Ferran, Encarnació; . (2018) . Metal (Pb, Cd, and Zn) Binding to Diverse Organic Matter Samples and Implications for Speciation Modeling. Environmental Science & Technology, 2018, vol. 52, núm. 7, p. 4163-4172. https://doi.org/10.1021/acs.est.7b05302.
Impacto


Logo de Web of Science    citaciones en Web of Science

Logo de Scopus    citaciones en Scopus

Logo de Google Académico  Google Académico
Compartir
Exportar a Mendeley
Metadatos
Mostrar el registro completo del ítem
Resumen
This study evaluated the influence of dissolved organic matter (DOM) properties on the speciation of Pb, Zn and Cd. Six DOM samples were categorized into autochthonous and allochthonous source based on their absorbance and fluorescence properties. The concentration of free metal ions (CM2+) measured by titration using Absence of Gradient and Nernstian Equilibrium Stripping (AGNES) was compared with that predicted by Windermere Humic Aqueous Model (WHAM). At the same binding condition (pH, dissolved organic carbon, ionic strength, and total metal concentration) the allochthonous DOM showed a higher level of Pb binding than the autochthonous DOM (84- to 504-fold CPb2+ variation). This dependency, however, was less pronounced for Zn (12- to 74-fold CZn2+ variation) and least for Cd (2- to 14-fold CCd2+ variation). The WHAM performance was affected by source variation through the active DOM fraction (F). The commonly used F = 1.3 provided reliable CPb2+ for allochthonous DOMs and acceptable CCd2+ for all DOM, but significantly underpredicted CPb2+ and CZn2+ for autochthonous DOM. Adjusting F improved CM2+ predictions, but the optimum F values were metal-specific (e.g., 0.03 - 1.9 for Pb), as showed by linear correlations with specific optical indexes. The results indicate a potential to improve WHAM by incorporating rapid measurement of DOM optical properties for site-specific F.
URI
http://hdl.handle.net/10459.1/65016
DOI
https://doi.org/10.1021/acs.est.7b05302
Es parte de
Environmental Science & Technology, 2018, vol. 52, núm. 7, p. 4163-4172
Proyectos de investigación europeos
Colecciones
  • Publicacions de projectes de recerca del Plan Nacional [2170]
  • Articles publicats (Agrotecnio Center) [924]
  • Articles publicats (Química) [238]

Publicaciones relacionadas

Showing items related by title, author, creator and subject.

  • Competition effects in cation binding to humic acid: conditional affinity spectra for fixed total metal concentration conditions 

    David, Calin; Mongin, Sandrine; Rey Castro, Carlos; Galceran i Nogués, Josep; Companys Ferran, Encarnació; Garcés, Josep Lluís; Salvador, José; Puy Llorens, Jaume; Cecilia Averós, Joan; Lodeiro, Pablo; Mas, Francesc (Elsevier, 2010)
    Information on the Pb and Cd binding to a purified Aldrich humic acid (HA) is obtained from the influence of different fixed total metal concentrations on the acid-base titrations of this ligand. NICA (Non-Ideal Competitive ...
  • Determination of free Zn2+ concentration in synthetic and natural samples with AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) and DMT (Donnan Membrane Technique) 

    Chito Trujillo, Diana Maria; Weng, Liping; Galceran i Nogués, Josep; Companys Ferran, Encarnació; Puy Llorens, Jaume; Riemsdijk, Willem H. van; Leeuwen, Herman P. van (Elsevier, 2012-04-01)
    The determination of free Zn2+ ion concentration is a key in the study of environmental systems like river water and soils, due to its impact on bioavailability and toxicity. AGNES (Absence of Gradients and Nernstian ...
  • A review on electrochemical methods for trace metal speciation in environmental media 

    Companys Ferran, Encarnació; Galceran i Nogués, Josep; Pinheiro, Jose Paulo; Puy Llorens, Jaume; Salaün, Pascal (Elsevier, 2017)
    Trace metal speciation is key to understand/predict bioavailability and potential toxicity of metals to biota and will, undoubtedly, be incorporated in future regulations. Electroanalytical methods have a role to play in ...

Contacto | Sugerencias | Aviso legal
© 2021 BiD. Universitat de Lleida
Metadatos sujetos a 
 

 

Explorar

Todo el repositorioComunidades y coleccionesPor fecha de publicaciónAutoresTítulosMateriasEsta colecciónPor fecha de publicaciónAutoresTítulosMaterias

Estadísticas

Ver Estadísticas de uso

De interés

Política institucional d'accés obertDiposita les teves publicacionsDiposita dades de recercaSuport a la recerca

Contacto | Sugerencias | Aviso legal
© 2021 BiD. Universitat de Lleida
Metadatos sujetos a