Influence of activated carbons porous structure on iopamidol adsorption

Elimination of persistent anthropogenic pollutants by micro-mesoporous carbon xerogels. Natural organic matter on surface water and textural properties influences

“…In this case, IHX, IMP and IPM are better adsorbed in the 1.3-5 nm diameter pore (r>0.87, table SI 8). These results are in accordance with the works of Mestre et al [45,46] that studied the adsorption of IPM in activated carbons. They concluded IPM adsorption took place on supermicropores and mesopore creating a dimmer or trimmer form of IPM depending on the texture of the adsorbent.…”

Chemically activated high grade nanoporous carbons from low density renewable biomass (Agave sisalana) for the removal of pharmaceuticals

“…3(b)). As a result, iopamidol removal on carbon S13.5/13.5/C3(s) does not follow the expected correlation with V  super + V meso reported in the literature [13,48]. It should also be pointed out that in the case of carbon S13.5/13.5/C3(s) the concentration of iopamidol remaining in solution at equilibrium is higher than 100 mg dm -3 ; according to molar conductivities measurements [48], this is indicative of the presence of iopamidol molecular aggregates that would not accommodate in the micropores of this sample (Fig.…”

“…Pseudo-second order ibuprofen and iopamidol adsorption parameters at ºC for carbons S13.5/13.5/C3(s), S13.5/13.5/H3(s) and commercial sample (NS): k 2 is the pseudosecond order rate constant; h is the initial adsorption rate; t 1/2 is the half-life time; q e,calc and C e,calc are respectively, the PhC uptake and that remaining in solution at equilibrium both calculated by the pseudo-second order kinetic model. Confronting the micropore size distributions ( Figure 5) with the critical dimensions of the pollutants (smallest section of the most stable configuration computed in aqueous solution, highlighted in bold in Figure 7), it can be concluded that ibuprofen molecule (critical dimension -0.72 nm) [47] can be easily adsorbed on the three carbons, while iopamidol (critical dimensions of 0.6, 1.2 or 1.5 nm, for the monomer, dimer or trimer, respectively) [48] presents diffusional constrains for most of them, with the exception of sample S13.5/13.5/H3(s) due to its continuous micropore size distribution. It is interesting to note that carbon S13.5/13.5/C3(s) presents the lowest iopamidol uptake;…”

“…Ibuprofen [47] Iopamidol [48] 1.32 (length) × 0.72 (width) × 0.77 (thickness) in nm Monomer -1.5 (length) × 1.5 (width) × 0.6 (thickness) in nm Dimer -1.5 (length) × 1.5 (width) × 1.2 (thickness) in nm Trimer -1.5 (length) × 1.5 (width) × 1.8 (thickness) in nm Figure 7. Structure and dimensions of ibuprofen sodium salt [47] and iopamidol species [48] (critical dimensions highlighted in bold).…”

Changes in physicochemical properties of activated carbon during treatment with supercritical water

“…Activated carbon (AC) is a well‐known material used in an increasing number of applications including wastewater treatment, catalyst supports, gas removal, energy storage devices, and so forth . It has a very complex pore structure, large surface area, good catalytic activity, high chemical stability, and a variety of heteroatoms comprising functional groups on its surface.…”