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首页> 外文期刊>Journal of applied sciences and environmental management >Adsorption of Methylene Blue from aqueous Solution on the Surface of Wool Fiber and Cotton Fiber
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Adsorption of Methylene Blue from aqueous Solution on the Surface of Wool Fiber and Cotton Fiber

机译：水溶液在羊毛和棉纤维表面吸附亚甲基蓝。

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摘要

Adsorption of dye methylene blue from aqueous solution on the surface of sheep wool and cotton fibers was accomplished under the optimize conditions of temperature, concentration, pH, stay time duration and quantity of adsorbent. Spectrometric technique was used for the measurements of concentration of dye before and after adsorption. The percentage removal and distribution constant (K_D) values for the removal of of methylene blue were also calculated. The values of % adsorption data for methylene blue - sheep wool system show better adsorption capacity as compared to methylene blue - cotton fiber system. The applicability of Langmuir and Freundlich adsorption isotherm equations for the present system was also tested. The experimental data are fitted to the Langmuir and Freundlich isotherm equations. The values of their corresponding constants were determined from the slope and intercepts of their respective plots. Thermodynamic parameters like ΔG°, ΔH° and ΔS° were calculated on the basis of Langmuir constant K. The methylene blue - sheep wool system show non spontaneous and exothermic behavior, while methylene blue - cotton fiber system show spontaneous and endothermic behavior. The results of these investigations suggested that natural adsorbents can be utilized as adsorbent materials, because of their selectivities for the removal of dyes.
机译：在温度，浓度，pH，停留时间和吸附剂的最适条件下，完成了从染料水溶液中吸附亚甲基蓝染料在绵羊毛和棉纤维表面的吸附。光谱技术用于测量吸附前后的染料浓度。还计算了去除亚甲基蓝的百分比去除率和分布常数（K_D）值。与亚甲基蓝-棉纤维系统相比，亚甲基蓝-羊毛系统的％吸附数据显示出更好的吸附能力。还测试了Langmuir和Freundlich吸附等温线方程在本系统中的适用性。实验数据拟合到Langmuir和Freundlich等温方程。由其各自曲线的斜率和截距确定其相应常数的值。根据Langmuir常数K计算出诸如ΔG°，ΔH°和ΔS°的热力学参数。亚甲基蓝-羊毛系统显示出非自发和放热的行为，而亚甲基蓝-棉纤维系统显示出自发和吸热的行为。这些研究的结果表明，天然吸附剂可以用作吸附剂材料，因为它们具有去除染料的选择性。

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