Polymerization of graphene oxide with polystyrene: Non-linear isotherms and kinetics studies of anionic dyes

Zirconium‐2‐Imidazolidinethione Functionalized Reduced Graphene Oxide Aerogel for Efficient Removal of Fluoride Ions and Anionic Dyes from Aqueous Solutions: Multivariate Process Optimization

“…K DR is the constant related to adsorption energy and is obtained from the D‐R isotherm equation (Table S4, Supporting Information), wherein the process is said to be physisorption if E < 8 kJ mol −1 , ion‐exchange if 8 ≤ E ≤ 16 kJ mol −1 and chemisorption if E > 16 kJ mol −1 . [ 42 ] We obtained n F > 1 for all three analytes and E < 8 kJ mol −1 (Table S4, Supporting Information), therefore, the adsorption process was physisorption in nature. The heterogeneous nature is caused by the sorbent's inherent geometrical (due to different pore sizes and shapes) and chemical heterogeneity (due to different functional groups available).…”

“…In general, if the adsorption sites on the adsorbent's surface are saturated, the removal percentage decreases as the initial dye concentration rises; however, if the adsorption sites on the adsorbent's surface are unsaturated, the removal percentage increases with the initial dye concentration because the high initial dye concentration provides a high mass transfer driving force for adsorption (Figure S12, Supporting Information). [ 42 ] The performance of Zr‐IMDT/rGOA was checked for ARS, and EY removal at fluoride optimized conditions ( Figure 8 ). Both dyes showed >50% removal within 5 min as indicated in Figure 8.…”

Production and characterization of biocompatible nano‐carrier based on Fe3O4 for magnetically hydroxychloroquine drug delivery

“…The D‐R equation can be express as follows: where q e (mol g −1 ) denotes the amount of a sorbate adsorbed on an adsorbent and Q m (mol g −1 ) denotes maximum adsorption capacity. K is represented as the constant of adsorption energy and ε [ε = RT ln (1 + 1/C e )] pointed to Polonyi potential 38 . The obtained results are listed in Table 2.…”

Investigation on the Controllable Synthesis of Colorized and Magnetic Polystyrene Beads With Millimeter Size via In Situ Suspension Polymerization

“…Faraguna et al (2017) have achieved PS nanocomposites with functionalized carbon nanotubes by the melt and solution mixing process, and they exhibited an in-depth investigation on the dispersion, melt rheology, and electrical and thermal properties of PS-MWCNT nanocomposites, which are prepared by the melt and solution mixing method. Azizi et al (2019) have synthesized PS-modified GO using an ammonium persulfate initiator, which is used as an adsorbent for the removal of three anionic dyes from wastewater. Nikpour et al (2022) have fabricated PS/Fe-MOF composite beads by a two-step method consisting of the synthesis of Fe-MOF and filling Fe-MOF into the PS matrix by the phase inversion method; the achieved material is utilized to uptake and separate various pollutions.…”