Department of Applied Science, Faculty of Science Engineering and Technology, Walter Sisulu University, Old King William Town Road, Potsdam Site, East London, 5200, South Africa.
Sci Rep. 2023 Jun 19;13(1):9872. doi: 10.1038/s41598-023-37181-2.
The quest for a cheap, effective, and eco-friendly wastewater treatment technique that is free of secondary toxic byproducts, calls for the fabrication of a nature-friendly adsorbent with a robust capacity to decontaminate polluted water sources and be recycled. To this end, we report the fabrication of novel nanocomposite (KMCM) from microcline (KMC) and multiwall carbon nanotubes (MWCNTs). The adsorbents (KMC and KMCM) were characterized using XRD, BET, SEM, TGA and FTIR. The novel and low-cost nano sorbent were designed for the elimination of tartrazine (Tatz) from wastewater. The adsorption of Tatz onto KMC and KMCM was influenced by adsorbent dose, initial Tatz concentration, contact time and solution pH. Experimental data acquired from the equilibrium studies were well addressed by the Langmuir isotherm model. The maximum uptake capacity of 37.96 mg g and 67.17 mg g were estimated for KMC and KMCM. The kinetics for the adsorption of Tatz onto KMC and KMCM was best expressed by pseudo-second-order and Elovich models. The thermodynamic parameters revealed that the uptake of Tatz onto KMC and KMCM was an endothermic (ΔH: KMC = 35.0 kJ mol and KMCM = 42.91 kJ mol), entropy-driven (ΔS: KMC = 177.6 J K mol and KMCM = 214.2 J K mol) and spontaneous process. Meanwhile, KMCM demonstrated good reusability potential and superior adsorption efficiency when compared to other adsorbents.
我们报道了一种新型纳米复合材料（KMCM）的制备，该复合材料由微斜长石（KMC）和多壁碳纳米管（MWCNTs）组成。采用 XRD、BET、SEM、TGA 和 FTIR 对吸附剂（KMC 和 KMCM）进行了表征。设计了这种新型、低成本的纳米吸附剂，用于从废水中去除酒石黄（Tatz）。Tatz 在 KMC 和 KMCM 上的吸附受吸附剂剂量、初始 Tatz 浓度、接触时间和溶液 pH 的影响。平衡研究获得的实验数据很好地符合朗缪尔等温线模型。KMC 和 KMCM 的最大吸附容量分别为 37.96 mg/g 和 67.17 mg/g。Tatz 在 KMC 和 KMCM 上的吸附动力学最好由拟二级和 Elovich 模型来描述。热力学参数表明，Tatz 在 KMC 和 KMCM 上的吸附是一个吸热过程（ΔH：KMC = 35.0 kJ/mol，KMCM = 42.91 kJ/mol），熵驱动（ΔS：KMC = 177.6 J/K/mol，KMCM = 214.2 J/K/mol）和自发过程。同时，与其他吸附剂相比，KMCM 表现出良好的可重复使用潜力和优越的吸附效率。
