The study focuses on fabrication of a cost‐effective Zinc Oxide nanoparticles (ZnONPs) adsorbent using Syngonium podophyllum leaves extract to remove hexavalent chromium (Cr6+) from synthetically prepared wastewater. Various spectroscopic techniques, including X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X‐ray analysis (EDX), and transmission electron microscopy (TEM), were used to characterize the ZnONPs. Fourier infra‐red spectroscopy (FTIR) detected that various organic compounds like flavonoids, terpenoids, and carboxylic acids acts as stabilizing and capping agent. The batch adsorption study was conducted to investigate the effects of Cr6+ adsorption time, pH, adsorbent concentration, and initial adsorbate concentration. The maximum adsorption capacity was 267.068 mg/g at 313 K. The Freundlich isotherm model was most suitable, indicating multilayer confiscation of Cr6+ on the heterogeneous surface. Chemisorption was identified as the mechanism of sequestration. Thermodynamic studies revealed that Cr6+ removal was spontaneous and feasible, with ΔG° values suggesting predominantly physisorption. Additionally, ZnONPs displayed strong antibacterial activity against S. aureus bacteria, making them a potential alternative to antibiotics. ZnONPs exhibited impressive antioxidant activity. Overall, ZnONPs synthesized through biosynthesis proved to be excellent nano‐sorbents, antioxidants, and biocompatible materials with promising applications in water remediation and healthcare.

中文翻译：

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绿色合成 ZnO 纳米粒子，用于高效去除 Cr(VI) 并具有抗氧化/微生物特性

该研究的重点是使用鬼臼合果叶子提取物去除六价铬（Cr6+）来自合成制备的废水。使用各种光谱技术，包括 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、能量色散 X 射线分析 (EDX) 和透射电子显微镜 (TEM)，来表征 ZnONP。傅里叶红外光谱 (FTIR) 检测到各种有机化合物，如类黄酮、萜类化合物和羧酸，可充当稳定剂和封端剂。进行批量吸附研究以研究 Cr 的影响6+吸附时间、pH、吸附剂浓度和初始吸附物浓度。 313 K 时最大吸附容量为 267.068 mg/g。Freundlich 等温线模型最合适，表明 Cr 的多层没收6+在异质表面上。化学吸附被确定为隔离机制。热力学研究表明 Cr6+去除是自发的且可行的，ΔG°值表明主要是物理吸附。此外，ZnONPs 对细菌表现出很强的抗菌活性。金黄色葡萄球菌细菌，使其成为抗生素的潜在替代品。 ZnONPs 表现出令人印象深刻的抗氧化活性。总体而言，通过生物合成合成的 ZnONP 被证明是优异的纳米吸附剂、抗氧化剂和生物相容性材料，在水修复和医疗保健方面具有广阔的应用前景。