Laboratoire des Applications de la Chimie aux Ressources et Substances Naturelles et à l'Environnement, Université de Carthage, Faculté des Sciences de Bizerte, 7021, Zarzouna, Tunisia.
Laboratoire Matériaux, Traitement et Analyse, BiotechPole Sidi-Thabet, Institut National de Recherche et d'Analyse Physico-chimique, 2020, Ariana, Tunisia.
Environ Sci Pollut Res Int. 2018 Aug;25(24):23817-23832. doi: 10.1007/s11356-018-2391-6. Epub 2018 Jun 6.
Textile dyes pose a significant challenge for water pollution due to the poor degradability of their complex aromatic structures (e.g., RR-120 and RBB-150). In order to minimize the harmful effects of RR-120 and RBB-150, the capacity of MgAl-layered double hydroxide for removing of these contaminants was studied herein. Batch adsorption experiments were conducted to investigate the effect of various operating parameters, such as solution pH, contact time, dye concentration, and temperature in order to provide optimal conditions for removal. Structural and morphological analyses were used to highlight the assembly and/or interaction LDH-dye. The state of equilibrium of RR-120 and RBB-150 adsorption was pH- and temperature-dependent and followed the pseudo-second-order rate model. Also, the equilibrium adsorption data of both dyes were found to adopt the Langmuir type isotherm model, which assumes a monolayer arrangement in LDH-dye. Furthermore, the effects of four major coexisting and competing mono- and divalent interlayer anions, such as NO, Cl, CO, and SO, on the uptakes of RR-120 and RBB-150 were studied and the results showed that NO anions had insignificant effect on the uptakes of RR-120 and RBB-150 by MgAl. An equivalent study on the presence of both dyes in competitive trial adsorption/desorption from binary aqueous solution was investigated. And finally, the reuse operation of recovered material after dye adsorption was tested in up to 5 cycles of recyclability.
纺织染料因其复杂芳香结构（如 RR-120 和 RBB-150）的低降解性而对水污染构成重大挑战。为了最大限度地减少 RR-120 和 RBB-150 的有害影响，研究了 MgAl 层状双氢氧化物去除这些污染物的能力。进行了批量吸附实验，以研究各种操作参数（如溶液 pH、接触时间、染料浓度和温度）的影响，以提供去除的最佳条件。结构和形态分析用于突出 LDH-染料的组装和/或相互作用。RR-120 和 RBB-150 吸附的平衡状态取决于 pH 值和温度，并遵循伪二阶速率模型。此外，两种染料的平衡吸附数据均采用 Langmuir 等温线模型，该模型假设在 LDH-染料中存在单层排列。此外，研究了四种主要共存和竞争的单价和二价层间阴离子（如 NO、Cl、CO 和 SO）对 RR-120 和 RBB-150 摄取的影响，结果表明 NO 阴离子对 RR-120 和 RBB-150 的摄取没有显著影响。还研究了二元水溶液中同时存在两种染料的竞争吸附/解吸的情况。最后，测试了染料吸附后回收材料在多达 5 个循环的可回收性中的再使用操作。
