Elaboration and characterization of poly (acrylic acid-co-crotonic acid) copolymers: Application to extraction of metal cations Pb(II), Cd(II) and Hg(II) by complexation in aqueous media

Comportement du Gonflement d’un Polymère Superabsorbant vis-à-vis de l’Eau dans un Sol Sableux

“…En raison de cette caractéristique, ils sont utilisés dans plusieurs domaines tels que ceux de l'horticulture et de l'agriculture [1,2]. Les polymères superabsorbants trouvent leur application également dans l'extraction, par complexation dans les solutions aqueuses, de certains cations métalliques tels que le mercure, le plomb et le cadmium [3]. De nombreuses études ont été publiées sur le gonflement des polyacrylates en solution.…”

Ultrasensitive electrochemical immunoassay based on cadmium ion-functionalized PSA@PAA nanospheres

“…The Cd 2+ were adsorbed for 5 h under stirring with discontinuous strong ultrasonic to ensure stabilized chelation, and then the PAA-Cd 2+ complex spheres were separated by centrifugation to remove the unbound and physically adsorbed Cd 2+ . It was reported that coordination number of similar poly (MA-alt-AA)-Cd 2+ complex appeared as 4, that is to say, one metal ion is coordinated by four chelating groups (Kavlak et al, 2004;Deng and Ting, 2005;Bassaid et al, 2008).…”

“…0.5 mL PSA@PAA solution was dispersed in 9.5 mL pure water containing 0.1 mM cadmium chloride under stirring. When PAA is mixed with Cd 2+ in aqueous solution, the coordination of the carboxyl anions with Cd 2+ leads to the formation of a PAA-Cd 2+ complex (Iatridi and Bokias, 2008;Kavlak et al, 2003Kavlak et al, , 2004Sheeney-Haj-Ichia et al, 2004;Deng and Ting, 2005;Bassaid et al, 2008). The Cd 2+ were adsorbed for 5 h under stirring with discontinuous strong ultrasonic to ensure stabilized chelation, and then the PAA-Cd 2+ complex spheres were separated by centrifugation to remove the unbound and physically adsorbed Cd 2+ .…”

“…Poly (acrylic acid) (PAA), a water-soluble polymer bearing carboxylic groups along the macromolecular chain, represents the water-soluble multifunctional material with the ability to associate with a variety of multivalent metal ions in solution (Iatridi and Bokias, 2008;Song et al, 2003;Ç aykara andİnam, 2003;Yokoi et al, 1986;Kavlak et al, 2003Kavlak et al, , 2004Sheeney-Haj-Ichia et al, 2004;Deng and Ting, 2005;Bassaid et al, 2008;Benegasa et al, 1998;Wiedmer et al, 2000), and the sensitivity to external stimuli (Iatridi and Bokias, 2008 sizes have been fabricated using core/shell fabrication method with poly-(styrene-acrylic acid) (PSA) latex spheres as guided template (Song et al, 2003). At the same time, PAA has the capability to make function with proteins (Kazakov et al, 2001;Zhou et al, 2007).…”

Determination of Mercury(II) in the Presence of Methylmercury after Preconcentration Using Poly(acrylamide) Grafted onto Cross-linked Poly(4-vinyl pyridine): Application to Mercury Speciation

“…Moreover, the preconcentration step also separates the analyte from most of the matrix materials, and thus eliminates possible interferences, and lower detection limits are achieved. 16 Several techniques have been used for the preconcentration of mercury, such as solvent extraction 17 and solid-phase extraction by polymeric sorbents, 18,19 wool, 20 activated carbon, 21 chitosan, 22 chelating resins, 23 clay, 24 and other materials. 25,26 Particularly, polymeric sorbents have recently attracted more attention because of their larger sorption capacities, higher efficiencies and ease of preparation.…”