Sorption of Ni(II) ions from aqueous solution by Lewatit cation-exchange resin

Removal of Phenol from Aqueous Solutions by Polymeric Composites Containing Ni and Co Particles

“…This knowledge is essential to understand the sorption process and plan the most suitable strategy for the desorption process [17][18][19] . The pseudo first-order kinetics model proposed by Lagergren is the first kinetics equation that relates adsorption in solid-liquid systems with the sorption capacity of the solid, q e [17][18][19]30] . According to this kinetics model, only the characteristics of the sorbent influences the adsorption kinetics, while the variation of the medium characteristics such as initial concentration of ions, pH, temperature, time, do not influence the adsorption mechanism.…”

“…The Elovich equation is commonly employed to determine the chemisorption kinetics of gases by heterogeneous adsorbents [17][18][19]30,31] . The correlation coefficient obtained was only 0.059, indicating that this model is not adequate to describe the phenol adsorption kinetics in aqueous solution by the magnetic composite.…”

“…This indicates that the solute transfer process between the resin phase and the solution does not influence the adsorption speed [17][18][19]30,31] . In order to determine the most adequate isotherm model that describes the adsorption process of phenol for the composite C1SNi the adsorption data, it was evaluated the Langmuir, Freundlich and Tempkin-Pyzhev models [5,17,19,20] . The calculated constants for these adsorption models are presented on Table 3.…”

“…From these experiments, data were obtained on sorption capacity q e (mg g -1 ) and amount of phenol adsorbed at time t q t (mg g -1 ) [3,7,[17][18][19] . The kinetics of phenol sorption on the resins was analyzed using the following models: Lagergren pseudo first-order, Pseudo second-order, Elovich, Weber-Morris intraparticle diffusion and external diffusion [3,7,[17][18][19] . The adsorption data were analyzed in terms of Langmuir, Freundlich and Tempkin-Pyzhev isotherm models [5,17,19,20] .…”

Aqueous heavy metals removal by adsorption on β-diketone-functionalized styrene–divinylbenzene copolymeric resin

“…These pollutants are present in water from industrial applications such as in the manufacture of pesticides, batteries, alloys, electroplated metal parts, mining, refining and production of textiles, paints and dyes (Patterson 1985;Roberts 1999;Abdel-Ghani et al 2009 are especially common metals that tend to accumulate in organisms, causing numerous diseases and disorders (Inglezakis et al 2003;Rivera-Utrilla and Sanchez-Polo 2003). A wide variety of techniques to remove heavy metals from water is available such as ion exchange (Dizge et al 2009;Rafati et al 2010), reverse osmosis and nanofiltration (FatinRouge et al 2006), precipitation, coagulation/co-precipitation and adsorption (Freeman 1989;Cheremisinoff 2002;Aguado et al 2009). This last technique is very popular due to simplicity and low cost.…”