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首页> 外文期刊>Journal of Applied Polymer Science >Surfactant-modified feldspar: Isotherm, kinetic, and thermodynamic of binary system dye removal
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Surfactant-modified feldspar: Isotherm, kinetic, and thermodynamic of binary system dye removal

机译：表面活性剂改性的长石：等温，动力学和热力学的二元体系染料去除

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In this article, surface modification of feldspar using hexadecyltrimethyl ammonium bromide (HDTMA) and its dye removal ability in single and binary systems was studied. Acid Black 1 (AB1) and Acid Red 14 (AR14) were used as model dyes. The monocomponent Langmuir isotherm model was applied to experimental data and the isotherm constants were calculated for both dyes. The monolayer coverage capacities of surfactant-modified feldspar (HDTMA-feldspar) for AB1 and AR14 dyes in single solution system were found as 6.369 mg/g and 3.984 mg/g, respectively. It was observed that the equilibrium uptake amounts of AB1 and AR14 dye in binary mixture onto sorbent decreased with increasing concentrations of the other dye resulting in their antagonistic effect. Equilibrium adsorption for binary systems was analyzed by using the Extended Langmuir and Jain and Snoeyink Modified Extended Langmuir models. The rate of kinetic processes of single and binary dye systems onto adsorbent was described by using two kinetics adsorption models. The pseudo-second-order model was the best choice among the kinetic models to describe the adsorption behavior of single and binary dyes onto HDTMA-feldspar. Thermodynamic parameters showed that dye adsorption on HDTMA-feldspar were exothermic and unspontaneous in nature.
机译：本文研究了十六烷基三甲基溴化铵（HDTMA）对长石的表面改性及其在单和双体系中的除染料能力。酸性黑1（AB1）和酸性红14（AR14）被用作模型染料。将单组分Langmuir等温线模型应用于实验数据，并计算了两种染料的等温线常数。表面活性剂改性的长石（HDTMA-长石）在单一溶液体系中对AB1和AR14染料的单层覆盖能力分别为6.369 mg / g和3.984 mg / g。观察到，二元混合物中AB1和AR14染料在吸附剂上的平衡摄取量随另一种染料浓度的增加而降低，从而导致它们的拮抗作用。通过使用扩展Langmuir模型和Jain and Snoeyink改进的扩展Langmuir模型分析了二元系统的平衡吸附。通过使用两个动力学吸附模型描述了单一和二元染料体系在吸附剂上的动力学过程速率。在描述单个和二元染料在HDTMA-长石上的吸附行为的动力学模型中，拟二级模型是最佳选择。热力学参数表明，染料在HDTMA-长石上的吸附是放热的，自然是不自然的。

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