p-Nitrophenol adsorption from aqueous solution on carbon black. Temperature effect

Application of a Single Model to Study the Adsorption Equilibrium of Prednisolone on Six Carbonaceous Materials

“…Thus, excepting for the CA-ICASA sample, the K ci values shown in Table 1 are similar to those found by Stitou (Stitou, personal communication) by studying the adsorption process of progesterone from ethanol solution on the same adsorbents. On the other hand, the K ci values are about 10 times lower than those obtained by González Martín (20) relating to the adsorption process of p-nitrofenol from aqueous solution by the same series of adsorbents. This fact might be probably due to the differences in the molecule size, Lewis basicity and type solvent.…”

Application of a Single Model to Study the Adsorption Kinetics of Prednisolone on Six Carbonaceous Materials

“…Previously to carry out the planned experiments, the physical chemistry surface characterization of the CA-ICASA sample was performed by using N 2 adsorption at 77.4 K. The remaining samples were previously characterized by other authors (4).…”

“…[4] and the experimental data points obtained for the adsorbent/prednisolone systems in solution here studied. It seems that these processes are conditioned to a great extent by the intraparticle diffusion of adsorbed prednisolone.…”

Retention of progesterone by four carbonaceous materials

“…These carbonaceous materials had previously been thoroughly characterised [19]. The adsorbate employed was pregn-4-en-3,20-dione (progesterone), supplied in analytical-reagent grade by Guinama (Valencia, Spain) and dissolved in pro-analysis ethanol from Panreac (Barcelona, Spain).…”

“…6 virtually coincides with that contained in the previous one. As noted earlier, fitting the experimental results to the Bangham equation (19) allows one to determine m (Table 4), which provides and indication of the influence of diffusion on the adsorption process.…”