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Abstract:

Natural water carrying a great amount of suspended particulate matter (SPM) was used as a model system for the study of the competition among organic ligands (dietilentetraamine pentaacetic acid, DTPA, nitrilotriacetic acid, NTA, and citrate, Cit) and natural complexants (SPM) for cadmium adsorption. Speciation diagrams at the pH of the natural sample were obtained by electroanalytical techniques, processing the experimental data with the complexation constants and the mass balance of the system. Results show that the adsorption equilibrium SPM-Cd is completely displaced by DTPA but not completely by NTA or Cit. Furthermore, larger Cit concentrations increase the amount of adsorbed Cd(II). The increment of the complexing capacity may be explained on the basis of SPM-Cit-Cd ternary complexes formation. This hypothesis was supported on the results obtained by applying for the first time the MALDI-TOF technique in a mixture of SPM, Cd(II), organic ligands and their complexes. © 2010 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:The influence of organic ligands on the adsorption of cadmium by suspended matter in natural waters studied by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and electrochemical methods
Autor:Minaberry, Y.S.; Gordillo, G.J.
Filiación:INQUIMAE - Departamento de Quimica Inorganica, Analitica y Quimica Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon 2, 1428 Buenos Aires, Argentina
Palabras clave:Cadmium; Competitive adsorption; Natural water; Organic ligands; Suspended particulate matter; Competitive adsorption; Natural waters; Organic ligands; Suspended particulate matter; Suspended particulate matters; Adsorption; Cadmium; Data processing; Desorption; Dewatering; Mass spectrometers; Mass spectrometry; Organic lasers; Ligands; cadmium; citric acid; nitrilotriacetic acid; pentetic acid; water; adsorption; cadmium; complexation; desorption; electrochemical method; hypothesis testing; ionization; ligand; mass spectrometry; pH; speciation (chemistry); suspended particulate matter; adsorption; article; complex formation; concentration (parameters); controlled study; electrochemical analysis; estuary; matrix assisted laser desorption ionization time of flight mass spectrometry; pH; potentiometry; suspended particulate matter; water analysis; water treatment; Adsorption; Cadmium; Citric Acid; Electrochemistry; Fresh Water; Nitrilotriacetic Acid; Particulate Matter; Pentetic Acid; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
Año:2010
Volumen:78
Número:11
Página de inicio:1356
Página de fin:1361
DOI: http://dx.doi.org/10.1016/j.chemosphere.2010.01.004
Título revista:Chemosphere
Título revista abreviado:Chemosphere
ISSN:00456535
CODEN:CMSHA
CAS:cadmium, 22537-48-0, 7440-43-9; citric acid, 126-44-3, 5949-29-1, 77-92-9, 8002-14-0; nitrilotriacetic acid, 139-13-9, 28528-44-1; pentetic acid, 14047-41-7, 67-43-6; water, 7732-18-5; Cadmium, 7440-43-9; Citric Acid, 77-92-9; Nitrilotriacetic Acid, 139-13-9; Particulate Matter; Pentetic Acid, 67-43-6
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00456535_v78_n11_p1356_Minaberry

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Citas:

---------- APA ----------
Minaberry, Y.S. & Gordillo, G.J. (2010) . The influence of organic ligands on the adsorption of cadmium by suspended matter in natural waters studied by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and electrochemical methods. Chemosphere, 78(11), 1356-1361.
http://dx.doi.org/10.1016/j.chemosphere.2010.01.004
---------- CHICAGO ----------
Minaberry, Y.S., Gordillo, G.J. "The influence of organic ligands on the adsorption of cadmium by suspended matter in natural waters studied by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and electrochemical methods" . Chemosphere 78, no. 11 (2010) : 1356-1361.
http://dx.doi.org/10.1016/j.chemosphere.2010.01.004
---------- MLA ----------
Minaberry, Y.S., Gordillo, G.J. "The influence of organic ligands on the adsorption of cadmium by suspended matter in natural waters studied by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and electrochemical methods" . Chemosphere, vol. 78, no. 11, 2010, pp. 1356-1361.
http://dx.doi.org/10.1016/j.chemosphere.2010.01.004
---------- VANCOUVER ----------
Minaberry, Y.S., Gordillo, G.J. The influence of organic ligands on the adsorption of cadmium by suspended matter in natural waters studied by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and electrochemical methods. Chemosphere. 2010;78(11):1356-1361.
http://dx.doi.org/10.1016/j.chemosphere.2010.01.004