Adsorption studies of benzophenone-3 onto clay minerals and organosilicates: Kinetics and modelling
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Abstract
This study is devoted to the experimental and the theoretical investigations of the adsorption kinetics of the benzophenone-3 (BZ-3) as a template molecule onto three adsorbents: lipophilic organosilicates (OSL), clay minerals LAPONITE® and montmorillonite (Mt) in ethanol. To elucidate the adsorption phenomena, kinetic behavior was analyzed with reaction-adsorption models in batch system such as pseudo-first-order (PFO), pseudo-second-order (PSO) and Elovich models. In the kinetic study, equilibrium was reached after 24 h and within 3 h. The adsorptive capacity was 291, 128 and 194 mg g−1 for OSL, LAPONITE® and Mt., respectively. PSO model represented the experimental data with high precision for the three adsorbents. Weber-Morris (WM) model and surface diffusion adsorbed-model (SDM) were also used as mechanism models. The multilinearity shown with the WM model indicated that the adsorption phenomenon involved more than one step including surface diffusion of BZ-3 followed by a ᴫ- ᴫ interaction between the aromatic nuclei of BZ-3 and the adsorbent. The organic molecule-adsorbent interaction was the kinetically limiting step in the case of OSL and Mt. while the surface diffusion was the kinetically limiting step in the case of LAPONITE®. Numerical resolution of the ordinary (ODE) and partial (PDE) differential equations were determined for the PFO-PSO and SDM respectively to optimize the adsorption prediction.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Mesoporous Materials and Catalysis · Surfactants and Colloidal Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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