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首页> 外文期刊>Journal of Environmental Management >Dye adsorption of cotton fabric grafted with PPI dendrimers: Isotherm and kinetic studies
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Dye adsorption of cotton fabric grafted with PPI dendrimers: Isotherm and kinetic studies

机译：PPI树状大分子接枝棉织物的染料吸附：等温线和动力学研究

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In this research, the cotton fabrics grafted with two generations of the poly(propylene imine) dendrimers were applied to adsorb textile dyes from aqueous solutions. Direct Red 80 (anionic dye), Disperse Yellow 42 (nonionic dye) and Basic Blue 9 (cationic dye) were selected as model dyes. The effect of various experimental parameters such as initial concentration of dyes, charge of dyes molecule, salt and pH was investigated on the adsorption process. Furthermore, kinetics and equilibrium of the adsorption process on the grafted samples were studied. It was found that maximum adsorption of anionic and disperse dyes took place at around pH 3, while cationic dye could be adsorbed at around pH 11. The Langmuir equation was able to describe the mechanism of dyes adsorption. In addition, the second-order equation was found to be fit with the kinetics data. Interestingly, it seems that the dye adsorption of the grafted fabrics is strongly pH dependent.
机译：在这项研究中，嫁接了两代聚丙稀亚胺树枝状聚合物的棉织物被用于吸附水溶液中的纺织品染料。选择直接红80（阴离子染料），分散黄42（非离子染料）和碱性蓝9（阳离子染料）作为模型染料。研究了各种实验参数如染料的初始浓度，染料分子的电荷，盐和pH值对吸附过程的影响。此外，研究了接枝样品上吸附过程的动力学和平衡。结果发现，阴离子和分散染料的最大吸附发生在pH 3左右，而阳离子染料可以在pH 11左右吸附。Langmuir方程能够描述染料的吸附机理。另外，发现二阶方程与动力学数据拟合。有趣的是，似乎接枝织物的染料吸附强烈依赖于pH。

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