This work reported the adsorption of Cr (VI) ions and acid orange 142 dye onto dead fungal biomass. The mycelium of Aspergillus ustus (MAU) was successfully cultured, grown, extracted and utilized as an efficient adsorbent. The extensive characterization studies of the as-prepared MAU sample were achieved with the Fourier Transform Infrared Spectrophotometer (FTIR), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) analyses. Process variables' effects were conducted in the following ranges: pH (3.0–6.0), contact time (0–120 min) and MAU dosage (0.5–5.0 g/L). The FTIR studies revealed that the amino, hydroxyl, and acetamide functional groups on the MAU provided veritable sites for Cr (VI) and AO142 binding. Optimum Cr (VI) uptake was however recorded at 80 min at pH 5.0, while that of AO142 dye was established at 120 min and pH 3.0. The Temkin and pseudo-second-order model aptly described the experimental isotherm and kinetic data. Hence, the MAU was efficient at adsorbing Cr (VI) and AO142 dye from an aqueous solution, but with a higher adsorption capacity for the AO142 molecules.

这项工作报道了死真菌生物质上 Cr (VI) 离子和酸性橙 142 染料的吸附。乌斯曲霉（MAU）的菌丝体被成功培养、生长、提取并用作有效的吸附剂。通过傅里叶变换红外分光光度计 (FTIR)、X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 和能量色散 X 射线 (EDX) 分析，对所制备的MAU样品进行了广泛的表征研究。过程变量的影响在以下范围内进行：pH (3.0–6.0)、接触时间（0–120 分钟）和MAU剂量（0.5–5.0 g/L）。FTIR 研究表明，MAU上的氨基、羟基和乙酰胺官能团为 Cr (VI) 和 AO142 结合提供了名副其实的位点。然而，在 pH 5.0 下 80 分钟记录了最佳 Cr (VI) 吸收，而 AO142 染料的最佳吸收在 pH 3.0 下 120 分钟确定。Temkin 和伪二阶模型恰当地描述了实验等温线和动力学数据。因此，MAU能够有效地从水溶液中吸附 Cr (VI) 和 AO142 染料，但对 AO142 分子具有更高的吸附能力。