Hamidi Farshad, Dehghani Mohammad Hadi, Kasraee Mahboobeh, Salari Mehdi, Shiri Leila, Mahvi Amir Hossein
Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Institute for Environmental Research, Center for Solid Waste Research, Tehran University of Medical Sciences, Tehran, Iran.
Sci Rep. 2022 Mar 19;12(1):4761. doi: 10.1038/s41598-022-08769-x.
The need for fresh water is more than before by population growth, and industrial development have affected the quality of water supplies, one of the important reason for water contamination is synthetic dyes and their extensive use in industries. Adsorption has been considered as a common methods for dye removal from waters. In this study, Acid Red18 removal in batch mode by using Granular Ferric Hydroxide (GFH) was investigated. The GFH characterized by XRD, FESEM and FTIR analysis. Experiments were designed using RSM-CCD method. The maximum removal efficiency was obtained 78.59% at pH = 5, GFH dosage = 2 g/l, AR18 concentration = 77.5 mg/l and 85 min of contact time. Optimization with RSM and Genetic Algorithm carried out and is similar together. The non-linear adsorption Isotherm and kinetic fitted with Freundlich (R2 = 0.978) and pseudo-second-order (R2 = 0.989) models, respectively. Thermodynamic studies showed that the AR18 adsorption is endothermic process and GFH nature was found spontaneous.
由于人口增长，对淡水的需求比以往任何时候都大，而工业发展影响了供水质量。水污染的一个重要原因是合成染料及其在工业中的广泛使用。吸附被认为是从水中去除染料的常用方法。在本研究中，研究了使用颗粒氢氧化铁（GFH）以间歇模式去除酸性红18。通过XRD、FESEM和FTIR分析对GFH进行了表征。使用RSM-CCD方法设计实验。在pH = 5、GFH剂量 = 2 g/l、AR18浓度 = 77.5 mg/l和接触时间85分钟时，获得了78.59%的最大去除效率。使用RSM和遗传算法进行了优化，结果相似。非线性吸附等温线和动力学分别符合Freundlich模型（R2 = 0.978）和伪二级模型（R2 = 0.989）。热力学研究表明，AR18吸附是吸热过程，并且发现GFH的吸附性质是自发的。
