Browsing Articles publicats (Agrotecnio Center) by Author "David, Calin"
Now showing items 1-7 of 7
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Acid-base properties of dissolved organic matter extracted from the marine environment
Lodeiro, Pablo; Rey Castro, Carlos; David, Calin; Achterberg, Eric P.; Puy Llorens, Jaume; Gledhill, Martha (Elsevier, 2020-08-10)Marine dissolved organic matter (DOM) plays a key role in the current and future global carbon cycle, which supports life on Earth. Trace metals such as iron, an essential micronutrient, compete with protons and major ions ... -
Dissolution and phosphate-induced transformation of ZnO nanoparticles in synthetic saliva probed by AGNES without previous solid-liquid separation. Comparison with UF-ICP-MS
David, Calin; Galceran i Nogués, Josep; Quattrini, Federico; Puy Llorens, Jaume; Rey Castro, Carlos (American Chemical Society, 2019-02-26)The variation over time of free Zn2+ ion concentration in stirred dispersions of ZnO nanoparticles (ZnO NPs) prepared in synthetic saliva at pH 6.80 and 37 degrees C was followed in situ (without solid liquid separation ... -
Dynamics of trace metal sorption by an ion-exchange chelating resin described by a mixed intraparticle/film diffusion transport model. The Cd/Chelex case
Quattrini, Federico; Galceran i Nogués, Josep; David, Calin; Puy Llorens, Jaume; Alberti, Giancarla; Rey Castro, Carlos (Elsevier, 2017-06-01)The time-evolution of Cd2+ ion sorption by Chelex 100 resin was studied in batch experiments as a function of time, pH, ionic strength, stirring rate, mass of resin and initial metal ion concentration. In the experimental ... -
Seasonal variations in proton binding characteristics of dissolved organic matter isolated from the southwest baltic sea
Lodeiro, Pablo; Rey Castro, Carlos; David, Calin; Puy Llorens, Jaume; Achterberg, Eric P.; Gledhill, Martha (ACS publications, 2021)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 ... -
Suitability of analytical methods to measure solubility for the purpose of nanoregulation
Tantra, Ratna; Bouwmeester, Hans; Bolea, Eduardo; Rey Castro, Carlos; David, Calin; Dogné, Jean Michel; Jarman, John; Laborda, Francisco; Laloy, Julie; Robinson, Kenneth N.; Undas, Anna K.; Van der Zande, Meike (Taylor & Francis, 2016)Solubility is an important physicochemical parameter in nanoregulation. If nanomaterial is completely soluble, then from a risk assessment point of view, its disposal can be treated much in the same way as “ordinary” ... -
Systematic Investigation of the Physicochemical Factors That Contribute to the Toxicity of ZnO Nanoparticles
Mu, Qingshan; David, Calin; Galceran i Nogués, Josep; Rey Castro, Carlos; Krzemiński, Łukasz; Wallace, Rachel; Bamiduro, Faith; Milne, Steven J.; Hondow, Nicole S.; Brydson, Rik; Vizcay-Barrena, Gema; Routledge, Michael N.; Jeuken, Lars J. C.; Brown, Andy P. (American Chemical Society, 2014)ZnO nanoparticles (NPs) are prone to dissolution, and uncertainty remains whether biological/cellular responses to ZnO NPs are solely due to the release of Zn2+ or whether the NPs themselves have additional toxic effects. ... -
The impact of electrodic adsorption on Zn, Cd and Pb speciation measurements with AGNES
Galceran i Nogués, Josep; Lao, Mireia; David, Calin; Companys Ferran, Encarnació; Rey Castro, Carlos; Salvador, José; Puy Llorens, Jaume (Elsevier, 2014-05-27)The systems assayed in this work (Cd with iodide, Cd with polyacrylic acid, Pb or Zn with xylenol orange, etc.) as well as others previously studied in our lab (Pb/Cd/Zn with humic acids, Pb with pyridinedicarboxylic acid, ...