Andrés Boulett , Karina Roa , Guadalupe Pizarro , Oscar Marambio , Paola Santander , Julio Sánchez
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引用次数: 0
Abstract
In this research, polymeric resins based on poly(3-sulfopropyl acrylate potassium salt) (P(SPAK)) and poly([3-(methacryloylamino)propyl] trimethylammonium chloride) (P(MAPTAC)) were prepared and tested as tetracycline (TC) adsorbents. These resins were characterized by chemical, thermal, morphological, surface techniques and by evaluating their hydration properties. P(SPAK) presented higher swelling ratio (27.6 g g−1) than P(MAPTAC) (15.6 g g−1). Also, we optimized by a multi-variate method the amount of resin and pH in TC removal using an experimental design, and then univariate evaluation of ionic strength concentration, contact time, TC concentration and temperature, reaching values of 713 mg g−1 for P(SPAK) at pH = 3 and 1067 mg g−1 for P(MAPTAC) at pH = 10.5, influenced by the chemical speciation of the pollutant and the resin. The low ionic strength favored adsorption, while high concentrations of KCl reduced it. The kinetics followed the Elovich model, reaching equilibrium in 1440 min. Freundlich isotherms indicated multilayer adsorption and energy heterogeneity. The process was endothermic and spontaneous with higher efficiency at higher temperatures. Finally, the resins proved to be reusable up to three consecutive adsorption-desorption cycles.
期刊介绍:
Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers.
Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.