The recovery of metals from electronic waste was investigated by using fungal strain Aspergillus fumigatus A2DS, isolated from the mining industry wastewater. Fifty-seven percent of copper and 32% of nickel were leached (analyzed by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-OES)) by the organism after one-step leaching at a temperature of 30 °C (shaking condition for 7 days). Maximum % of copper and nickel were obtained at a pH of 6 (58.7% Cu and 32% Ni), the temperature of 40 °C (61.8% Cu and 27.07% Ni), a pulp density of 0.5% (62% Cu and 42.37% Ni), and inoculums of 1% (58% Cu and 32.29% Ni). The XRD pattern of PCB showed 77.6% of copper containing compounds. XRD analysis of the leachate residue showed only 23.2% Euchorite (ASCu₂H₇O₈) and 9.4% other copper containing compounds, indicating the leaching property of the fungus. HPLC analysis of the spent medium showed the presence of different acids like citric, succinic, and fumaric acid. The FTIR spectrum showed a decrease in carboxylic stretching in the leachate produced after bioleaching using spent medium. ICPOES of the leachate obtained using spent medium showed that 61% of the copper and 35% of nickel were leached out after seven days of incubation at shaking condition and 57% of copper and 32.8% of nickel at static condition confirming acidolysis property of the strain. A. fumigatus A2DS metal absorption and adsorption ability were observed using transmission electron microscopy (TEM) and scanning electron microscopy energy dispersive X-ray (SEM-EDX) respectively. The results thus indicate that bioleaching of Cu and Ni is bioleached by A. fumigatus A2DS.

使用从采矿业废水中分离出的真菌菌株烟曲霉A2DS 研究了从电子废物中回收金属的情况。在30℃的一步浸出（振荡条件7天）后，有机体浸出57%的铜和32%的镍（通过电感耦合等离子体原子发射光谱（ICP-OES）分析） 。在 pH 值为 6（58.7% Cu 和 32% Ni）、温度为 40 °C（61.8% Cu 和 27.07% Ni）、矿浆密度为 0.5%（62% Cu 和 32% Ni）时获得最大百分比的铜和镍。 42.37% Ni），接种量为 1%（58% Cu 和 32.29% Ni）。PCB 的 XRD 图显示 77.6% 的含铜化合物。浸出液残渣的X射线衍射分析显示，仅含有23.2％的Euchorite（ASCu ₂ H ₇ O ₈）和9.4％的其他含铜化合物，表明真菌的浸出特性。对废培养基的 HPLC 分析表明存在不同的酸，如柠檬酸、琥珀酸和富马酸。FTIR 光谱显示使用废介质进行生物浸出后产生的浸出液中的羧基拉伸减少。使用废培养基获得的浸出液的 ICPOES 显示，在振荡条件下孵育 7 天后，浸出 61% 的铜和 35% 的镍，在静态条件下浸出 57% 的铜和 32.8% 的镍，证实了菌株的酸解特性。分别采用透射电子显微镜（TEM）和扫描电子显微镜能量色散X射线（SEM-EDX）观察烟曲霉A2DS对金属的吸收和吸附能力。因此，结果表明Cu和Ni的生物浸出是由烟曲霉A2DS生物浸出的。