Rostami Mohammad Saeid, Khodaei Mohammad Mehdi
Department of Organic Chemistry, Razi University, 67149-67346 Kermanshah, Iran.
Department of Organic Chemistry, Razi University, 67149-67346 Kermanshah, Iran; Nanoscience and Nanotechnology Research Center, Razi University, 67149-67346 Kermanshah, Iran.
Int J Biol Macromol. 2023 Apr 30;235:123723. doi: 10.1016/j.ijbiomac.2023.123723. Epub 2023 Feb 15.
Regarding the existence of cationic and anionic dyes in the water environment developing new and effective techniques to remove them simultaneously is essential. Herein, a chitosan/poly-2-aminothiazole composite film reinforced with multi-walled carbon nanotube-Mg Al-layered double hydroxide (CPML) was created, characterized, and used as an effective adsorbent for methylene blue (MB) and methyl orange (MO) dyes removal from the aquatic medium. The SEM, TGA, FTIR, XRD, and BET methods were used to characterize the synthesized CPML. Response surface methodology (RSM) was utilized to evaluate dye removal based on the initial concentration, dosage, and pH factors. The highest adsorption capacities were measured at 471.12 and 230.87 mg g for MB and MO, respectively. The study of different isotherm and kinetic models revealed that the adsorption of the dyes onto CPML nanocomposite (NC) was correlated with the Langmuir and pseudo-second-order kinetic model, which indicated a monolayer adsorption manner on the homogeneous surface of NCs. The reusability experiment clarified that the CPML NC could be applied multiple times. Experimental results show that the CPML NC has sufficient potential for treating cationic and anionic dye-contaminated water.
关于水环境中阳离子和阴离子染料的存在，开发新的有效技术同时去除它们至关重要。在此，制备了一种用多壁碳纳米管-镁铝层状双氢氧化物增强的壳聚糖/聚-2-氨基噻唑复合膜（CPML），对其进行了表征，并用作从水介质中去除亚甲基蓝（MB）和甲基橙（MO）染料的有效吸附剂。采用扫描电子显微镜（SEM）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）和比表面积分析（BET）方法对合成的CPML进行表征。利用响应面法（RSM）基于初始浓度、剂量和pH值因素评估染料去除情况。MB和MO的最高吸附容量分别为471.12和230.87 mg/g。对不同等温线和动力学模型的研究表明，染料在CPML纳米复合材料（NC）上的吸附与朗缪尔等温线和伪二级动力学模型相关，这表明在NCs的均匀表面上以单层吸附方式进行吸附。可重复使用性实验表明CPML NC可以多次应用。实验结果表明，CPML NC在处理阳离子和阴离子染料污染水方面具有足够的潜力。
