Abstract A novel porous ceramsite was made of municipal sludge, coal fly ash, and river sediment by sintering process, and the performance of batch and fixed-bed column systems containing this material in the removal of acid red G (ARG) dye from aqueous solutions was assessed in this study. The results of orthogonal test showed that sintering temperature was the most important determinant in the preparation of porous ceramsite, and it possesses developed pore structure and high specific surface area. Batch experiment results indicated that the adsorption process of ARG dye toward porous ceramsite was a spontaneous exothermic reaction, which could be better described with Freundlich–Langmuir isotherm model (R 2 > 0.992) and basically followed the pseudo-first-order kinetic equation (R 2 > 0.993). Column experiment results showed that when the porous ceramsite was used as packing material, its adsorption capacity was roughly improved by 3.5 times compared with that in batch system, and the breakthrough behavior was simulated well with Yoon–Nelson model, with R 2 > 0.954. This study suggested that the novelty man-made porous ceramsite obtained from solid wastes might be processed as a certain cost-effective treatment material fit for the dye removal in aqueous solutions.

中文翻译：

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固体废物产生的多孔陶粒从水溶液中去除酸性红 G 染料：批量和固定床研究

摘要 以城市污泥、粉煤灰和河流泥沙为原料，通过烧结工艺制备了一种新型多孔陶粒，以及含有这种材料的间歇式和固定床柱系统去除水溶液中酸性红 G (ARG) 染料的性能。在本研究中进行了评估。正交试验结果表明，烧结温度是多孔陶粒制备过程中最重要的决定因素，多孔陶粒具有发达的孔隙结构和较高的比表面积。批量实验结果表明，ARG染料对多孔陶粒的吸附过程为自发放热反应，可以用Freundlich-Langmuir等温线模型(R 2 > 0.992)更好地描述，基本遵循拟一级动力学方程(R 2 > 0.993）。柱实验结果表明，当多孔陶粒作为填料时，其吸附容量比批处理系统提高了3.5倍，突破行为用Yoon-Nelson模型模拟得很好，R 2 > 0.954。该研究表明，从固体废物中提取的新型人造多孔陶粒可以作为一种具有成本效益的处理材料，适用于水溶液中的染料去除。