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首页> 外文期刊>Journal of Applied Polymer Science >Dye removal from colored-textile wastewater using chitosan-PPI dendrimer hybrid as a biopolymer: Optimization, kinetic, and isotherm studies
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Dye removal from colored-textile wastewater using chitosan-PPI dendrimer hybrid as a biopolymer: Optimization, kinetic, and isotherm studies

机译：壳聚糖-PPI树枝状大分子杂物作为生物聚合物去除有色纺织废水中的染料：优化，动力学和等温线研究

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Preparation of a biopolymer chitosan-polypropylene imine (CS-PPI) as a biocompatible adsorbent and its reactive textile dyes removal potential were performed. Chemical specifications of CS-PPI were determined using Fourier transform infrared, 1H-NMR, and 13C-NMR. The surface morphology of the CS-PPI surface was characterized by scanning electron microscopy. Results confirmed that the linkages between the NH2 groups of PPI dendrimer and carboxylic groups of modified Chitosan were accomplished chemically. Two textile reactive dyes, reactive black 5 (RB5) and reactive red 198 (RR198), were used as model compounds. A response surface methodology was applied to estimate the simple and combined effects of the operating variables, including pH, dye concentration, time contact, and temperature. Under the optimal values of process parameters, the dye removal performance of 97 and 99% was achieved for RB5 and RR198, respectively. Furthermore, the isotherm and kinetic models of dyes adsorption were performed. Adsorption data represented that both examined dye followed the Langmuir isotherm. The adsorption kinetics of both reactive dyes were satisfied by pseudo-second order equation. Based on this study, CS-PPI due to having high adsorption capacity (6250 mg/g for RB5 and 5882.35 mg/g for RR198), biocompatibility and ecofriendly properties might be a suitable adsorbent for removal of reactive dyes from colored solutions.
机译：进行了作为生物相容性吸附剂的生物聚合物壳聚糖-聚丙烯亚胺（CS-PPI）的制备及其活性染料的去除潜力。 CS-PPI的化学规格是使用傅立叶变换红外光谱，1H-NMR和13C-NMR确定的。 CS-PPI表面的表面形态通过扫描电子显微镜表征。结果证实，PPI树状大分子的NH 2基团与改性壳聚糖的羧基基团之间的连接是化学完成的。两种纺织活性染料，活性黑5（RB5）和活性红198（RR198），用作模型化合物。应用响应表面方法来估算操作变量的简单和综合影响，包括pH，染料浓度，时间接触和温度。在最佳工艺参数值下，RB5和RR198的脱色性能分别达到97％和99％。此外，进行了染料吸附的等温线和动力学模型。吸附数据表明，两种检测的染料均遵循Langmuir等温线。两种活性染料的吸附动力学满足拟二阶方程。根据这项研究，CS-PPI具有高吸附能力（RB5为6250 mg / g，RR198为5882.35 mg / g），生物相容性和环保特性可能是从有色溶液中去除活性染料的合适吸附剂。

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