In the present study, FeNPs were mycosynthesized by extract of fungus Aspergillus terreus GS28. The mycosynthesized FeNPs were characterized by transmission and scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction analysis, and particle size analyzer. The biofabricated FeNPs were positively charged and their size varied from 20 to 60 nm as found in different investigations. The biological originated materials (phenolic component, protein, and amino acids) are associated with FeNPs for capping the nanoparticles. The mycosynthesized FeNPs showed excellent adsorption capacity for CR (48.7 mg/g) and DB-1 (38.0 mg/g) with a removal efficiency of 97.5 and 77.1%, respectively, at 100 mg/L of CR/DB-1, pH 7.0, 30 °C, 2 g/L concentration of FeNPs, 240 min, and shaking condition of 120 rpm. FeNPs also exhibited high dye removal performance under the presence of selective ions such as Na⁺, Mn²⁺, Zn²⁺, Ni²⁺, and NH₄⁺. The pseudo-second-order kinetic model best fitted with the adsorption of DB-1 and CR. The multilayer layer adsorption was dominated in CR removal and the adsorption data well fitted with the Freundlich isotherm model while, DB-1 adsorption happened through monolayer adsorption on FeNPs and DB-1 adsorption data was fitted with the Langmuir isotherm model. Electrostatic attraction, hydrogen bond, and Fe–O interaction are the principle mechanism that deals with CR and DB-1 adsorption. Thus, mycosynthesized FeNPs has potential for adsorptive removal DB-1 and CR and can be used for large scale application.

在本研究中，FeNPs 是由真菌土曲霉的提取物真菌合成的GS28。通过透射和扫描电子显微镜、傅里叶变换红外光谱、X 射线衍射分析和粒度分析仪对真菌合成的 FeNP 进行了表征。在不同的研究中发现，生物制造的 FeNP 带正电荷，其大小从 20 到 60 nm 不等。生物源材料（酚类成分、蛋白质和氨基酸）与 FeNPs 相关联，用于覆盖纳米颗粒。真菌合成的 FeNPs 对 CR (48.7 mg/g) 和 DB-1 (38.0 mg/g) 表现出优异的吸附能力，去除效率分别为 97.5% 和 77.1%，在 100 mg/L 的 CR/DB-1，pH 7.0、30 °C、2 g/L FeNPs 浓度、240 分钟和 120 rpm 的振荡条件。FeNPs 在选择性离子如 Na 的存在下也表现出很高的染料去除性能⁺、Mn ²⁺、Zn ²⁺、Ni ²⁺和NH ₄ ⁺。拟二级动力学模型最适合 DB-1 和 CR 的吸附。多层吸附在 CR 去除中占主导地位，吸附数据符合 Freundlich 等温线模型，而 DB-1 吸附通过 FeNPs 上的单层吸附发生，DB-1 吸附数据符合 Langmuir 等温线模型。静电引力、氢键和 Fe-O 相互作用是处理 CR 和 DB-1 吸附的主要机制。因此，真菌合成的 FeNPs 具有吸附去除 DB-1 和 CR 的潜力，可用于大规模应用。