The present study aimed to determine the sorption behavior of crystal violet (CV) dye on forest wastes of Salix alba L. (white willow) (SA) and Salix babylonica L. (weeping willow) (SB). Forest waste adsorbents were investigated as a novel alternative natural adsorbent to removal of crystal violet (CV) in the polluted waters with the contact time (0–300 min), solution pH (2.8–9.1), initial dye concentration (25–150 mg/L), adsorbent dosage (1–15 g/L), and temperature (15–45 °C). The adsorbent materials were characterized by FTIR spectroscopy and isoelectric point (pHpzc) measurements. The isothermal adsorption property, the kinetic mechanisms, and thermodynamic adsorption characteristics of the adsorption of CV by adsorbents of SA and SB from forest wastes were investigated by the adsorption test. The equilibrium time of adsorption was found that 240 min for all adsorbents. The removal efficiency of SA and SB was 98.18% and 97.60%, at 5 g/L biosorbent dosages respectively. The second-order kinetic model was found to be best suited for all adsorbents (R² = 0.99). The adsorption isotherm data correspond well to the Langmuir equation and the adsorption capacity of SA and SB adsorbents was found to be 35.21 mg/g and 36.50 mg/g at 25 °C, respectively. The thermodynamic parameters suggest that, for both materials, the process was endothermic and spontaneous in the range of temperatures studied and the adsorbents utilized in this experiment can successfully remove CV dye from aqueous solution.

本研究旨在确定结晶紫 (CV) 染料对Salix alba L. (white willow) (SA) 和Salix babylonica森林废弃物的吸附行为。L.（垂柳）（SB）。研究了森林废弃物吸附剂作为一种新型替代天然吸附剂，可在接触时间（0-300 分钟）、溶液 pH 值（2.8-9.1）、初始染料浓度（25-150 毫克）的情况下去除污染水中的结晶紫 (CV) /L)、吸附剂用量 (1–15 g/L) 和温度 (15–45 °C)。通过 FTIR 光谱和等电点 (pHpzc) 测量对吸附材料进行了表征。通过吸附试验研究了SA和SB吸附剂对森林废弃物吸附CV的等温吸附性能、动力学机理和热力学吸附特性。发现所有吸附剂的吸附平衡时间为 240 分钟。SA 和 SB 的去除效率分别为 98.18% 和 97.60%，在 5 g/L 生物吸附剂剂量下。²  = 0.99)。吸附等温线数据很好地符合 Langmuir 方程，发现 SA 和 SB 吸附剂在 25 °C 下的吸附容量分别为 35.21 mg/g 和 36.50 mg/g。热力学参数表明，对于这两种材料，该过程在所研究的温度范围内是吸热和自发的，并且本实验中使用的吸附剂可以成功地从水溶液中去除 CV 染料。