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Risoluzione schermo: 640 x 480 800 x 600 1024 x 768 1280 x 1024 Nome utente: Password: Formato: Basic  Help  Richiesta  Formato: Tipo di Carattere Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Dimensione del Carattere 1 2 3 4 5 6   Colore del Carattere Nero Rosso Giallo Rosa Verde Arancione Viola Blu Beige Marrone Verde Bosco Blu scuro Marrone scuro Verde chiaro Messaggio: HTML non è attivo Il codice su forum è attivo Faccine [quote][i]Originariamente inviato da SAKURAJUN[/i] [br]Modeling high adsorption capacity and kinetics of organic macromolecules on super-powdered activated carbon [url=https://www.powdered-activated-carbon.com/]powdered carbon for sale[/url] The capacity to adsorb natural organic matter (NOM) and polystyrene sulfonates (PSSs) on small particle-size activated carbon (super-powdered activated carbon, SPAC) is higher than that on larger particle-size activated carbon (powdered-activated carbon, PAC). Increased adsorption capacity is likely attributable to the larger external surface area because the NOM and PSS molecules do not completely penetrate the adsorbent particle; they preferentially adsorb near the outer surface of the particle. In this study, we propose a new isotherm equation, the Shell Adsorption Model (SAM), to explain the higher adsorption capacity on smaller adsorbent particles and to describe quantitatively adsorption isotherms of activated carbons of different particle sizes: PAC and SPAC. The SAM was verified with the experimental data of PSS adsorption kinetics as well as equilibrium. SAM successfully characterized PSS adsorption isotherm data for SPACs and PAC simultaneously with the same model parameters. When SAM was incorporated into an adsorption kinetic model, kinetic decay curves for PSSs adsorbing onto activated carbons of different particle sizes could be simultaneously described with a single kinetics parameter value. On the other hand, when SAM was not incorporated into such an adsorption kinetic model and instead isotherms were described by the Freundlich model, the kinetic decay curves were not well described. [url=https://www.granular-activated-carbon.com/]activated carbon[/url]The success of the SAM further supports the adsorption mechanism of PSSs preferentially adsorbing near the outer surface of activated carbon particles. [/quote]   Seleziona qui per inserire la tua firma.