Preparation and evaluation of hydrotalcite-iron oxide magnetic organocomposite intercalated with surfactants for cationic methylene blue dye removal

Synthesis, characteristics and sonocatalytic activities of calcined γ-Fe2O3 and TiO2 nanotubes/γ-Fe2O3 magnetic catalysts in the degradation of Orange G

“…Zeta potential analysis is used to measure the magnitude of the particles' surface charge and the electrophoretic mobility of the particles in suspension [36]. NTs/γ-Fe 2 O 3 composite were found to be 5.3, 6.6, and 6.3 respectively, which were approximate to the values reported in the previous literatures.…”

Polyethyleneimine as a novel desorbent for anionic organic dyes on layered double hydroxide surface

“…In comparison with other adsorbents, LDHs can be easily recycled by anion exchange, which is attracting current research interest [8,9]. However, considerable examples have been reported on adsorptive properties of LDHs toward anionic dyes, few studies have addressed desorption of anionic dyes [10]. Generally, NaCl-NaOH, Na 2 CO 3 , or high-press CO 2 is employed as efficient desorbents to remove adsorbed anions from LDH materials via anion exchange process [11][12][13][14].…”

Cu(II), Pb(II) and Cd(II) sorption on different layered double hydroxides. A kinetic and thermodynamic study and competing factors

“…suggested that the pseudo-second order sorption mechanism was predominant, and that the overall rate of the metal uptake appeared to be controlled by a chemisorption process as was indicated by Ho (2006) [22]. The pseudo-second-order rate expression has been widely applied in the description of the sorption of the pollutants from aqueous solutions (pesticides, dyes, metal ions, and organic substances) on different sorbents [23][24][25][26]. The advantage of using this model is that there is no need to know the equilibrium capacity (qe)…”