Branched pore kinetic model analysis of geosmin adsorption on super-powdered activated carbon

Enhanced nitrobenzene adsorption in aqueous solution by surface silylated MCM-41

“…It is proposed that increasing numbers of mesopores can reduce the length of the diffusion path to the micropores and accelerate the pore diffusion of nitrobenzene molecules [29]. On the other hand, smaller adsorbent particle size could improve adsorption rate due to shorter travel distance for intraparticle radial diffusion and larger specific surface area [30]. However, some researchers have found that when granular activated carbon is ground to mm-sized particles, it still requires quite a longer time to reach adsorption equilibrium for nitrobenzene adsorption (more than 48 h) [26,31].…”

Adsorption of pyridine from aqueous solutions by polymeric adsorbents MN 200 and MN 500. Part 2: Kinetics and diffusion analysis

“…Study of pore size heterogeneity revealed the variation of adsorbate diffusivity within the porous adsorbent [23,39,40]. These processes have been modelled as a fractal-like dependence of diffusion coefficient [34,41,42], or to involve correlated variables, by categorising the adsorption kinetics into macropore and micropore diffusional regions, respectively [32,39,43]. As a key element for assessing the adsorption performance, the importance of surface diffusion in contributing to the total adsorbent mass transfer in porous materials has been highlighted in many liquid-surface adsorption systems [44,45].…”

Colloidal activated carbon for in-situ groundwater remediation — Transport characteristics and adsorption of organic compounds in water-saturated sediment columns

“…So-called super powder activated carbon with a significantly lower particle size of about 1 μm, which is significantly smaller than commercial powdered activated carbon (typically N 10 μm) was suggested for application in batch reactors for water treatment with the focus on the acceleration of the adsorption processes (Matsui et al, 2009).…”