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首页> 外文期刊>RSC Advances >Removal of safranin-O dye from aqueous solution using modified red mud: kinetics and equilibrium studies
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Removal of safranin-O dye from aqueous solution using modified red mud: kinetics and equilibrium studies

机译：使用改性赤泥从水溶液中去除番红O染料的动力学和平衡研究

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The object of this study was to evaluate the efficiency of safranin-O dye removal from aqueous solutions with application of red mud waste as an adsorbent. For this propose, the surface of the red mud was modified by the addition of sodium dodecyl sulphate as an anionic surfactant. Different instrumental techniques were used to understand the physiochemical properties and the surface properties of the modified red mud for the adsorption of safranin-O dye. Batch adsorption experiments were carried out to understand the optimum conditions with respect to solution pH, contact time and initial dye concentration. Kinetics data were best fitted with a pseudo-second-order model. The adsorption isotherms data were a good fit to the Langmuir model with a maximum monolayer adsorption capacity of 89.4 mg g(-1) at 308 K. Desorption experiments were carried out by testing several solvents such as water, sulphuric acid, hydrochloric acid and acetic acid and the maximum (93.2%) desorption was found using hydrochloric acid.
机译：这项研究的目的是评估以红泥废料为吸附剂从水溶液中去除藏红素-O染料的效率。对于该提议，赤泥的表面通过添加十二烷基硫酸钠作为阴离子表面活性剂来改性。使用了不同的仪器技术来了解改性红泥的吸附藏红素-O染料的理化性质和表面性质。进行批量吸附实验以了解关于溶液pH，接触时间和初始染料浓度的最佳条件。动力学数据最适合伪二阶模型。吸附等温线数据非常适合Langmuir模型，在308 K下的最大单层吸附容量为89.4 mg g（-1）。通过测试多种溶剂（例如水，硫酸，盐酸和乙酸）进行了解吸实验酸，使用盐酸发现最大的解吸（93.2％）。

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