Full
Outline
In response to the large amount of uranium containing wastewater generated during the mining and processing of uranium resources, two types of edible mushroom processing waste, Velvet Antler Mushroom Feet (VAMS) and Red Bamboo Fungus Cap (BFP), were used as biological adsorbents to investigate their removal performance of U (VI) in aqueous solutions. The effects of acidity, adsorption time, initial uranium concentration, solid-liquid mass-volume ratio, coexisting ions and temperature on the U (VI) adsorption performance of edible fungus processing waste were systematically investigated by the static batch method. The results show that under the conditions of pH=5.0 and temperature of 25 ℃, the maximum adsorption capacities of VAMS and BFP for U (VI) are 24.34 mg/g and 23.88 mg/g, respectively, with removal rates reaching 97.7% and 91.8% accordingly. Moreover, Ca2+ has the strongest interference effect on the adsorption of U (VI).VAMS and BFP reach equilibrium at 2 hours and 4 hours, respectively, and conform to the pseudo-second-order kinetic model and Freundlich isotherm model. This indicates that the adsorption process is mainly dominated by multi-molecular layer chemical adsorption. The thermodynamic parameters (ΔG<0, ΔH>0) confirm that the adsorption is a spontaneous endothermic reaction. Combined with the characterizations of SEM-EDS, FT-IR and XPS, the adsorption of U (VI) by VAMS mainly relies on the coordination of hydroxyl groups on the material surface, while the adsorption of U (VI) by BFP mainly depends on the coordination of nitrogen-containing functional groups on the material surface. The research results not only indicate that edible mushroom processing waste has good adsorption performance for uranyl ions, but also realize the resource utilization of agricultural waste, providing a low-cost and environmentally friendly adsorption material for the treatment of uranium containing wastewater, which has important application value.
113
20
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
