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首页> 外文期刊>International Journal of Advanced Biotechnology and Research >Adsorption of basic blue41 dye on modified tea waste: optimization and kinetic studies
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Adsorption of basic blue41 dye on modified tea waste: optimization and kinetic studies

机译：碱性blue41染料在改性茶渣上的吸附：优化和动力学研究

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Colored dye effluents raise a major threat to the surrounding ecosystem. Many of the dyes are extremely toxic.The aim of this study was to determine the equilibrium and kinetics adsorption of basic blue 41 dye (BB41) fromwastewater by modified tea waste as a natural adsorbent. The target adsorbent was prepared in laboratoryconditions and pulverized by ASTM standard sieves. The composition and physicochemical properties ofmodified tea waste (MTW) determined by utilization of various technique such as FTIR, SEM, EDS, BET, andXRD. The initial concentrations of BB41were selected in the range of 25 and 100 mg.L-1. The experimental datawere fitted with Langmuir and Freundlich isotherm models. The experimental adsorption isotherm was in goodconcordance with Langmuir model (r2 = 0.98). Based on the Langmuir isotherm the maximum amount ofadsorption (qm) was found to be 48.78 mg.g-1. Increase of the adsorbent dose led to increase of the dye removalefficiency. Furthermore, increase of the solution pH up to 9 led to the improvement of dye adsorption. Themaximum adsorption of dye was observed at pH 9. The kinetic studies showed that the adsorption of basic blue 41on modified tea waste was complied with pseudo-second order kinetic (r2 > 0.99) for all concentration.
机译：有色染料废水对周围的生态系统构成重大威胁。许多染料具有剧毒。本研究的目的是确定改性茶叶废料作为天然吸附剂从废水中吸收碱性碱性41染料（BB41）的平衡和动力学吸附。在实验室条件下制备目标吸附剂，并通过ASTM标准筛将其粉碎。利用各种技术（例如FTIR，SEM，EDS，BET和XRD）确定改性茶渣（MTW）的组成和理化性质。 BB41的初始浓度选择为25至100 mg.L-1。实验数据符合Langmuir和Freundlich等温线模型。实验吸附等温线与Langmuir模型具有良好的一致性（r2 = 0.98）。基于Langmuir等温线，最大吸附量（qm）为48.78 mg.g-1。吸附剂剂量的增加导致染料去除效率的增加。此外，将溶液的pH值提高到9可以改善染料的吸附。在pH 9时观察到染料的最大吸附。动力学研究表明，在所有浓度下，碱性蓝41在改性茶渣上的吸附均符合拟二级动力学（r2> 0.99）。

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