Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria 21934, Egypt.
Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt.
Molecules. 2022 Mar 11;27(6):1831. doi: 10.3390/molecules27061831.
The presence of cationic dyes, even in a tiny amount, is harmful to aquatic life and pollutes the environment. Therefore, it is essential to remove these hazardous dyes to protect the life of marine creatures from these pollutants. In this research, crystal violet (CV) dye elimination was performed using a lignin copper ferrite (LCF) adsorbent. The adsorbent was synthesized and characterized using FTIR, Raman, SEM, EDX with mapping, and VSM, which proved the successful formation of magnetic LCF. Adsorption experiments were performed using different effective parameters. The highest adsorption potential (97%) was executed at mild operating conditions, with a 5 min contact time at room temperature and pH 8. The adsorption kinetic study utilized four kinetic models: first-order, second-order, intraparticle diffusion, and Elovich. The results revealed that the adsorption process complies with the pseudo-first-order with a maximum adsorption capacity of 34.129 mg/g, proving that the adsorption process mechanism is a physical adsorption process. Three isotherm models, Langmuir, Freundlich, and Temkin, were examined. The adsorption mechanism of CV onto LCF was also followed by the Langmuir and Freundlich models. The thermodynamic parameters were examined and revealed that the adsorption onto LCF was an exothermic process. It was proposed that the adsorption process is a spontaneous exothermic process. LCF appears to forcefully remove toxic CV dye from textile wastewater.
阳离子染料的存在，即使数量很少，对水生生物也是有害的，并会污染环境。因此，去除这些有害染料对于保护海洋生物免受这些污染物的侵害至关重要。在这项研究中，使用木质素铜铁氧体（LCF）吸附剂去除结晶紫（CV）染料。使用 FTIR、拉曼、SEM、EDX 映射和 VSM 对吸附剂进行了合成和表征，证明了磁性 LCF 的成功形成。进行了吸附实验，使用了不同的有效参数。在温和的操作条件下，吸附潜力最高（97%），在室温下接触 5 分钟，pH 值为 8。吸附动力学研究使用了四个动力学模型：一级、二级、内扩散和 Elovich。结果表明，吸附过程符合准一级动力学，最大吸附容量为 34.129mg/g，证明吸附过程机制是物理吸附过程。还检验了三种等温线模型：朗缪尔、弗伦德利希和滕金。CV 吸附到 LCF 上的机制也遵循朗缪尔和弗伦德利希模型。还检验了热力学参数，表明 CV 吸附到 LCF 上是一个放热过程。提出吸附过程是一个自发的放热过程。LCF 似乎可以从纺织废水中强力去除有毒的 CV 染料。
