| Abstrakt: |
In this study, the removal of Hg (II) from cypress leaves and cypress pines was examined. Factors like time of contact (1-60 min), amount of biosorbent used (0.02-0.06 min), pH levels (1.2-6.52 min), initial metal concentration (100-250 ppm) temperature (20-40 min), strength of ions (0.5-1.5 M), and speed of stirring (0-250 min) were studied. Kinetic data were described using both pseudo-first-order and pseudo-second-order models. Equilibrium data were analyzed using Langmuir and Freundlich models, with the Langmuir model fitting the data best. The kinetic data were best described by the pseudo-second-order model. Thermodynamic studies showed that the removal of Hg(II) by cypress leaves was exothermic. The Plackett-Burman design (PBD) and Box-Wilson designs were used for optimization, recommending values of 250 mg/L, 5.98, 7.98 min, and 0.5 g for the variables Co (initial concentration of Hg(II) ions), pH (acidity level), contact time, and mass of KNO3 (potassium nitrate) for the removal of mercury (II) by cypress pines. [ABSTRACT FROM AUTHOR] |
