Department of Chemistry, Faculty of Science, Isra University, P.O. Box 22, Amman 11622, Jordan.
Int J Mol Sci. 2022 Oct 8;23(19):11959. doi: 10.3390/ijms231911959.
Three hair dyes of Arianor madder red 306003 (R), Arian or Straw Yellow 306005 (Y), and Arianor ebony 306020 (E) were removed from an aqueous solution in a batch mode using a powder of oak cupules coated with ZnO (COZ). The COZ-adsorbent material was characterized in terms of XRD, FT-IR, and SEM analysis. The best conditions for the uptake of hair dyes by COZ were investigated. For Y dye, the best uptake was estimated on 0.06 g of COZ at 7.0 pH for 150 min. The E dye uptake requires 120 min on 0.05 g of COZ at 9.0 pH. For E hair dye, kinetic data revealed a pseudo-first-order model for E hair dye and a pseudo-second-order model for R and Y. Equilibrium data exhibited consistency with the Langmuir isotherm model for the adsorption of E dye onto COZ, and the Freundlich isotherm model for the adsorption of R and Y hair dyes onto COZ. Isotherms models of D-R and Temkin were also examined. The thermodynamic parameters (-ve ∆G and +ve ∆H and ∆S) demonstrated that the removal of hair dyes by COZ is spontaneous, endothermic, and feasible. The adsorption capacity of COZ for R, Y, and E uptake was found to be 55.5, 52.6, and 135.1 mg·g, respectively. Furthermore, COZ reusability was demonstrated after five cycles of regeneration, with a negligible decline in adsorption extent (13.08%, 13.85, and 10.20% for R, Y, and E, respectively) in comparison to its initial capacity.
三种染发剂，即 Arianor 茜素红 306003（R）、Arianor 稻草黄 306005（Y）和 Arianor 乌木 306020（E），从水溶液中以粉末形式在批量模式下使用涂有 ZnO（COZ）的栎树果壳去除。COZ 吸附剂材料的特征在于 XRD、FT-IR 和 SEM 分析。研究了 COZ 对染发剂的最佳吸收条件。对于 Y 染料，在 7.0 pH 下，最佳吸收量估计为 0.06 g COZ，时间为 150 分钟。在 9.0 pH 下，0.05 g COZ 对 E 染料的吸收需要 120 分钟。对于 E 染料，动力学数据表明 E 染料的吸附符合准一级动力学模型，而 R 和 Y 的吸附符合准二级动力学模型。平衡数据表明，E 染料在 COZ 上的吸附符合 Langmuir 等温线模型，R 和 Y 染料在 COZ 上的吸附符合 Freundlich 等温线模型。还研究了 D-R 和 Temkin 等吸附等温线模型。热力学参数（-ve ∆G 和 +ve ∆H 和 ∆S）表明，COZ 去除染发剂是自发的、吸热的和可行的。COZ 对 R、Y 和 E 的吸附容量分别为 55.5、52.6 和 135.1 mg·g。此外，COZ 在经过五次再生循环后仍具有可重复使用性，与初始容量相比，吸附程度的下降可忽略不计（R、Y 和 E 分别为 13.08%、13.85%和 10.20%）。
