Adsorption of crystal violet dye using Platanus orientalis (Chinar tree) leaf powder and its biochar: equilibrium, kinetics and thermodynamics study

Potential of easily prepared low-cost rice husk biochar and burnt clay composite for the removal of methylene blue dye from contaminated water

“…Only single-layer adsorption on the adsorbent surface retaining a specific number of similar sites is applicable to the Langmuir model. 57 Additionally, this model assumes that the adsorbate molecules do not migrate in the surface plane and the adsorption energies on the adsorbent surface are comparable. The following equation is a mathematical representation of the Langmuir model: 57 1…”

“…57 Additionally, this model assumes that the adsorbate molecules do not migrate in the surface plane and the adsorption energies on the adsorbent surface are comparable. The following equation is a mathematical representation of the Langmuir model: 57 1…”

“…This is attributed to the decreased binding forces between the active sites on the adsorbent surface and methylene blue molecules. 57 The statistical data for the thermodynamic parameters are shown in Table S19. † Table S20 † displays the computed results of the thermodynamic parameters.…”

“…Langmuir and Freundlich isotherms are the well-known and often applied isotherm models. 57 The experimental results from this work were investigated using the Langmuir, Freundlich, and DR adsorption isotherms to assess the adsorption of MB dye on the RHBC/BC adsorbent.…”

“…Only single-layer adsorption on the adsorbent surface retaining a specific number of similar sites is applicable to the Langmuir model. 57 Additionally, this model assumes that the adsorbate molecules do not migrate in the surface plane and the adsorption energies on the adsorbent surface are comparable. The following equation is a mathematical representation of the Langmuir model: 57 where Q eq (mg g −1 ) represents how much “MB” dye is adsorbed at equilibrium, b (L mg −1 ) and Q o (mg g −1 ) are the Langmuir constants and C eq (mg L −1 ) is the concentration of MB in solution at equilibrium.…”