Physics Department, Faculty of Science, Assiut University, Assiut, 17516, Egypt.
Chemistry Department, Faculty of Science, Assiut University, Assiut, 17516, Egypt.
Environ Sci Pollut Res Int. 2024 Oct;31(49):58889-58904. doi: 10.1007/s11356-024-34929-9. Epub 2024 Sep 25.
Treating dye-containing wastewater poses numerous challenges due to its high chemical complexity and its persistent nature. Thus, the present study aims to synthesize biochar derived from banana peel (BC) and its nanocomposites with copper oxide nanoparticles (CuO/BC) for the purpose of adsorptive removing Congo red (CR) dye from water. Several analytical methods were utilized to describe the physicochemical features of the CuO/BC nanocomposites. It was found that the crystallinity of the nanocomposites gradually improved, while the specific surface area and the surface electronegativity were reduced with increasing x value. The effects of x values (0-0.5), interaction time (10-120 min), adsorbent dose (0.01-0.05 g), initial CR concentration (20-200 mg/L), and the solution temperature (20-60 °C) were evaluated on CR removal. The obtained results revealed that the CuO/BC nanocomposite showed the highest adsorption efficiency with a maximum adsorption capacity of 233.6 mgg. Analysis of the equilibrium experimental data revealed that the Langmuir and the pseudo-2nd-order models were the most proper to describe the current adsorption process. Moreover, the thermodynamics studies demonstrated that the adsorption process was spontaneous, endothermic, and random.
处理含染料废水由于其化学复杂性高和持久性而面临诸多挑战。因此，本研究旨在合成由香蕉皮（BC）和其与氧化铜纳米粒子（CuO/BC）的纳米复合材料，用于从水中吸附去除刚果红（CR）染料。采用多种分析方法描述了 CuO/BC 纳米复合材料的物理化学特征。结果发现，纳米复合材料的结晶度逐渐提高，而比表面积和表面电负性随着 x 值的增加而降低。考察了 x 值（0-0.5）、相互作用时间（10-120 分钟）、吸附剂剂量（0.01-0.05 克）、初始 CR 浓度（20-200 毫克/升）和溶液温度（20-60°C）对 CR 去除的影响。结果表明，CuO/BC 纳米复合材料的吸附效率最高，最大吸附容量为 233.6 mgg。对平衡实验数据的分析表明，Langmuir 和准二级模型最适合描述当前的吸附过程。此外，热力学研究表明吸附过程是自发的、吸热的和随机的。
