Hassen Yeshi Endris, Gedda Gangaraju, Assen Ayalew H, Kabtamu Daniel Manaye, Girma Wubshet Mekonnen
Department of Chemistry, College of Natural Science, Wollo University, P.O. Box 1145, Dessie 1000, Ethiopia.
Department of Chemistry, School of Engineering, Presidency University, Bangalore 560064, Karnataka, India.
ACS Omega. 2023 May 2;8(19):17209-17219. doi: 10.1021/acsomega.3c01609. eCollection 2023 May 16.
The enhanced worldwide concern for the protection and safety of the environment has made the scientific community focus their devotion on novel and highly effective approaches to heavy metals such as cadmium (Cd) pollutant removal. In this research, plant extract-mediated AlO and CuO nanoparticle (NP) syntheses were accomplished using the coprecipitation method, and the CuO/AlO nanocomposite was prepared by simple mixing of CuO and AlO NPs for the removal of Cd(II) ions from aqueous solution. Therefore, an efficient green, economical, facile, and eco-friendly synthesis method was employed, which improved the aggregation of individual metal oxide NPs. The chemical and physical properties of the nanocomposite were examined by different characterization techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and Brunauer-Emmett-Teller (BET) surface area analysis. Furthermore, the performances of the nanoadsorbents for the adsorptive eradication of Cd ions from water were investigated. The influence of pH, contact time, initial Cd quantity, and nanocomposite amount on adsorption effectiveness was carefully studied. The adsorption rates of the CuO/AlO nanocomposite were rapid, and adsorption equilibrium was attained within 60 min for 97.36% removal of Cd(II) from water. The adsorption isotherm data were best fitted by the pseudo-second-order kinetic and Langmuir isotherm models with the highest adsorption ability of 4.48 mg/g. Therefore, the synthesized CuO/AlO nanocomposite could be a potential candidate for a highly efficient adsorbent for heavy metal ion removal from aqueous solutions.
全球对环境保护和安全的关注度不断提高，促使科学界致力于研究去除镉（Cd）等重金属污染物的新型高效方法。本研究采用共沉淀法，通过植物提取物介导合成了AlO和CuO纳米颗粒（NP），并将CuO和AlO NPs简单混合制备了CuO/AlO纳米复合材料，用于去除水溶液中的Cd(II)离子。因此，采用了一种高效、绿色、经济、简便且环保的合成方法，该方法减少了单个金属氧化物NP的团聚。通过扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）和布鲁诺尔-埃米特-泰勒（BET）表面积分析等不同表征技术对纳米复合材料的化学和物理性质进行了研究。此外，还研究了纳米吸附剂从水中吸附去除Cd离子的性能。仔细研究了pH值、接触时间、初始Cd含量和纳米复合材料用量对吸附效果的影响。CuO/AlO纳米复合材料的吸附速率很快，在60分钟内达到吸附平衡，从水中去除Cd(II)的效率为97.36%。吸附等温线数据最符合伪二级动力学和朗缪尔等温线模型，最高吸附能力为4.48 mg/g。因此，合成的CuO/AlO纳米复合材料可能是从水溶液中高效去除重金属离子的潜在吸附剂。
