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Abstract:

Flocculation performances of cationized agaroses of different degrees of substitution in the range 0.04-0.77 are reported for the first time. The cationized agaroses were successfully synthesized by the reaction of agarose with 3-chloro-2-hydroxypropyltrimethylammonium chloride in alkaline medium. Two of the cationized agaroses with degrees of substitution of 0.19 and 0.58, presented colloid flocculation performances comparable to commercial cationic polyacrylamides, as determined from assays using kaolin suspensions as model systems. Zeta potential measurements for the cationized agarose that presented the best performance suggested that bridge formation, rather than charge neutralization, should be the main mechanism responsible for flocculation of kaolin particles. Cationized agaroses may constitute a new flocculating agent with promising properties for water treatment, especially if the source of the agarose is a seaweed species of easy availability. © 2011 Elsevier B.V.

Registro:

Documento: Artículo
Título:Potential use of a novel modified seaweed polysaccharide as flocculating agent
Autor:Prado, H.J.; Matulewicz, M.C.; Bonelli, P.R.; Cukierman, A.L.
Filiación:Departamento de Química Orgánica, CIHIDECAR (CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, (C1428EGA), Buenos Aires, Argentina
PINMATE, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, (C1428EGA), Buenos Aires, Argentina
Cátedra de Farmacotecnia II, Departamento de Tecnología Farmacéutica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956, (C1113AAD), Buenos Aires, Argentina
Palabras clave:3-chloro-2-hydroxypropyltrimethylammonium chloride; Cationic polysaccharides; Cationized agarose; Flocculation; Kaolin; Water treatment; 3-chloro-2-hydroxypropyltrimethylammonium chloride; Agarose; Alkaline medium; Bridge formation; Cationic polyacrylamides; Cationic polysaccharide; Cationized; Charge neutralization; Degrees of substitution; Flocculating agents; Kaolin particles; Kaolin suspensions; Model system; Zeta potential measurements; Chlorine compounds; Kaolin; Seaweed; Suspensions (fluids); Water treatment; Zeta potential; Flocculation; cation; flocculation; kaolin; performance assessment; polysaccharide; reaction kinetics; seaweed; water treatment
Año:2011
Volumen:281
Número:1
Página de inicio:100
Página de fin:104
DOI: http://dx.doi.org/10.1016/j.desal.2011.07.061
Título revista:Desalination
Título revista abreviado:Desalination
ISSN:00119164
CODEN:DSLNA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00119164_v281_n1_p100_Prado

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Citas:

---------- APA ----------
Prado, H.J., Matulewicz, M.C., Bonelli, P.R. & Cukierman, A.L. (2011) . Potential use of a novel modified seaweed polysaccharide as flocculating agent. Desalination, 281(1), 100-104.
http://dx.doi.org/10.1016/j.desal.2011.07.061
---------- CHICAGO ----------
Prado, H.J., Matulewicz, M.C., Bonelli, P.R., Cukierman, A.L. "Potential use of a novel modified seaweed polysaccharide as flocculating agent" . Desalination 281, no. 1 (2011) : 100-104.
http://dx.doi.org/10.1016/j.desal.2011.07.061
---------- MLA ----------
Prado, H.J., Matulewicz, M.C., Bonelli, P.R., Cukierman, A.L. "Potential use of a novel modified seaweed polysaccharide as flocculating agent" . Desalination, vol. 281, no. 1, 2011, pp. 100-104.
http://dx.doi.org/10.1016/j.desal.2011.07.061
---------- VANCOUVER ----------
Prado, H.J., Matulewicz, M.C., Bonelli, P.R., Cukierman, A.L. Potential use of a novel modified seaweed polysaccharide as flocculating agent. Desalination. 2011;281(1):100-104.
http://dx.doi.org/10.1016/j.desal.2011.07.061