Effectiveness and Characterization of Novel Mineral Clay in Cd2+ Adsorption Process: Linear and Non-Linear Isotherm Regression Analysis

The excellent adsorption properties of clay minerals make the optimization heavy metal removal subject numerous research projects. In present study, ASLAVITAL cosmetic (ACC) powder was applied for Cd2+ from water. main deposit ACC is Pădurea Craiului Mountains in Romania. A wide range morpho-structural approaches (SEM, EDX, FTIR, Raman, XRD) were used to characterize morphology and elemental composition adsorbent. As expected minerals, Al (Wt(%) = 11.4 ± 0.9) Si 13.7 1.4) are constituents ACC. After adsorption, Wt(%) 0.2 0.01 detected sample. proved before, initial concentration primary influencing factor; therefore, batch 10–160 mg/L investigated. 190 min, an efficiency 99% reached, quantity equilibrium increased 1–8 mg/g. best fit linear form obtained Langmuir II. model, where R2 0.954 (RL 0.037–0.027). Based on isotherm models, physical bonds formed between during favorable adsorption. For non-linear fits, Liu model be 0.965, χ2 1.101. Pseudo-II-order kinetic described experimental data 0.988–0.999; qexp qcalc almost identical (the differences ranged 0.03–0.34).