Calculation of adsorption isotherms by statistical physics models: a review

Abstract

Adsorption is a major basic and applied phenomenon in many scientific disciplines. In particular, the design of adsorbents to remove pollutants from wastewater requires advanced knowledge of adsorption isotherms, which are useful tools to identify physicochemical factors that control adsorption performance. Recent modeling of adsorption isotherms has focused on the use of statistical physics. Here, we review the major adsorption isotherm models based on statistical physics. We discuss steric, energetic, and thermodynamic parameters.

A novel CO2 activation at room temperature to prepare an engineered lanthanum-based adsorbent for a sustainable arsenic removal from water

“…Calculated steric parameters nAs and DLaX for the arsenic adsorption on N-La10 and C-La10 are reported in Table 3. Results showed that the arsenic adsorption on the surfaces of both adsorbents was a multi-molecular process (i.e., nAs > 1) especially at 25 °C where more than one arsenic anion could interact with a lanthanum functionality via an inclined or perpendicular adsorption position (Amrhar et al, 2021). However, the adsorption orientation of arsenic anions on adsorbent surfaces changed as the solution temperature increased where a potential multi-anchorage of this geogenic pollutant could occur at > 30 °C.…”

“…It is convenient to remark that lanthanum has a great affinity for anions, makes stable compounds with them and has the possibility of interacting simultaneously with several arsenic anions due to its valence (Wang et al, 2016;Lingamdinne et al, 2019). Therefore, this adsorption model is given by (Amrhar et al, 2021)…”

Invasive plants as biosorbents for environmental remediation: a review

“…These molecules exist in various forms, such as alkali metals, alkaline earth metals, transition metals, and non-metals (Dahou et al 2021). While such elements only account for negligible proportion, they could be dissolved in the polluted solutions and thus lower the biosorption capacity of raw biomass (Amrhar et al 2021). Regardless of the little concern or even lack in the material preparation method, the explants could be generally washed by distilled water at ambient temperature before drying (Bansal et al 2021).…”

Sustainable Downstream Separation of Itaconic Acid Using Carbon-Based Adsorbents

“…This model assumed that several molecules of adsorbate (i.e., IA) can form multilayers (i.e., clusters) onto the adsorbent surface (i.e., CSK6). Details and fundaments of this model can be found in the review of Amrhar et al [31]. Therefore, the adsorption capacity can be defined by this model with the next equations [31].…”