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首页> 外文期刊>Journal of Applied Polymer Science >Bamboo charcoal modified with Cu2+ and 3-aminopropyl trimethoxy silane for the adsorption of acid fuchsin dye: Optimization by response surface methodology and the adsorption mechanism
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Bamboo charcoal modified with Cu2+ and 3-aminopropyl trimethoxy silane for the adsorption of acid fuchsin dye: Optimization by response surface methodology and the adsorption mechanism

机译：用Cu2 +和3-氨基丙基三甲氧基硅烷改性竹炭，用于吸附酸紫红色染料：通过响应面方法和吸附机制优化

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摘要

The bamboo charcoal modified with Cu2+ and 3-aminopropyl trimethoxy silane (BC-Cu/Si-NH2) was synthesized and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, and surface acid-base potentiometric titration. The adsorption for acid fuchsin (AF) dyes onto BC-Cu/Si-NH2 was investigated. Moreover, response surface methodology was performed to optimize the process parameters including pH, initial dye concentration, adsorbent dosage, and temperature. The results presented that the adsorption process was mainly influenced by initial AF concentration and adsorbent dosage. Isotherm studies revealed that the adsorption data fitted well with the Sips model and Dubinin-Radushkevich (D-R) model, which indicated the monolayer, homogeneous, and physical nature of the adsorption process. The maximum adsorption capacity calculated from D-R model could approach approximately to 14.91mgg(-1) at 40 degrees C, and the maximum adsorption capacity of Sips reached to 10.77mg g(-1) at 40 degrees C. The kinetic experimental data matched well with Spahn and Schlunder model as well as pseudo-second-order model. In addition, intraparticle diffusion was not the only rate-controlling step of adsorption process. Thermodynamic parameters revealed the feasibility, spontaneity, and endothermic nature of adsorption. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47728.
机译：用Cu 2 +和3-氨基丙基三甲氧基硅烷（BC-Cu / Si-NH2）改性的竹炭，并通过X射线衍射，傅里叶变换红外光谱，扫描电子显微镜，能量色散光谱和表面酸碱电位滴定。研究了对酸紫素（AF）染料在BC-Cu / Si-NH 2上的吸附。此外，进行响应面方法，以优化包括pH，初始染料浓度，吸附剂剂量和温度的过程参数。结果表明，吸附过程主要受初始AF浓度和吸附剂量的影响。等温的研究表明，吸附数据与啜饮型号和Dubinin-Radushkevich（D-R）模型很好，这表明了吸附过程的单层，均匀和物理性质。由DR模型计算的最大吸附容量在40摄氏度下大约接近14.91mgg（-1），并且啜饮的最大吸附容量在40摄氏度下达到10.77mg g（-1）。良好的动力学实验数据匹配用spahn和schlunder模型以及伪二阶模型。此外，骨质粒子扩散不是吸附过程的唯一速率控制步骤。热力学参数揭示了吸附的可行性，自发性和吸热性质。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47728。

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