Departamento de Ingeniería Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Avenida Wilfrido Massieu s/n, Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, 07738, Mexico City, Mexico.
Sci Rep. 2021 Sep 16;11(1):18413. doi: 10.1038/s41598-021-98034-4.
In this work, the biosorption behavior of acid red 27 (AR27) dye using Eichhornia crassipes leaves (LECs) in a packed-bed column was investigated by varying relevant operational parameters and assessment of mathematical models. Results showed that the zero-charge point of LECs was 2.37 and that optima pH and volumetric flux of the influent solution for AR27 biosorption were 2.0 and [Formula: see text], respectively. The maximum specific and volumetric biosorption capacities were observed at influent AR27 concentrations and with LEC bed heights ranging between 50 and 400 mg/L and 2 and 8 cm, respectively. It was also found that if LEC bed height was increased and volumetric flux and AR27 concentration of the influent solution decreased, service and saturation time increased. Modeling results revealed that the Thomas, bed depth service time, Yoon-Nelson, dose-response, and logistic models accurately described the dynamic performance of the packed-bed column in terms of pH, AR27 concentration, and volumetric flux of influent AR27 solution, as well as that of LEC bed height. The findings revealed that LECs exhibited remarkable potential for the biosorption of AR27 from aqueous solutions in a packed-bed column and could potentially be useful for the treatment of AR27-laden wastewater.
在这项工作中，通过改变相关操作参数并评估数学模型，研究了用凤眼蓝叶（LEC）在填充床柱中吸附酸性红 27（AR27）染料的生物吸附行为。结果表明，LEC 的零电荷点为 2.37，AR27 生物吸附的最佳 pH 值和入口溶液体积通量分别为 2.0 和 [Formula: see text]。在入口 AR27 浓度和 LEC 床层高度分别在 50 和 400mg/L 以及 2 和 8cm 之间的范围内，观察到最大的比和体积生物吸附容量。还发现，如果增加 LEC 床层高度并降低体积通量和入口 AR27 溶液的浓度，则会增加服务和饱和时间。模型结果表明，Thomas、床层深度服务时间、Yoon-Nelson、剂量响应和 logistic 模型准确描述了填充床柱在 pH 值、入口 AR27 溶液浓度和体积通量以及 LEC 床层高度方面的动态性能。研究结果表明，LEC 对水溶液中的 AR27 具有显著的生物吸附潜力，可能对处理 AR27 废水有用。
