Full
Outline
The phosphorus content in sludge incineration ash is relatively high. Extracting and recovering it can effectively alleviate the contradiction between the supply and demand of phosphorus. Leaching of phosphorus from sludge incineration ash with nitric acid was studied. The effects of nitric acid concentration, leaching temperature, leaching time and the ratio of liquid volume to solid mass on the leaching rate of phosphorus were investigated. The restrictive links of phosphorus leaching were determined and the kinetic equation was established. The results show that under the conditions of nitric acid concentration of 1 mol/L, temperature of 298 K, leaching time of 60 min, stirring speed of 500 r/min, and liquid volume to solid mass ratio of 40 mL/1 g, the leaching rate of phosphorus reaches 91.36%. Internal diffusion control is the limiting link in the phosphorus leaching process, and the activation energy of the leaching reaction is 2.11 kJ/mol. The method has a relatively high phosphorus extraction efficiency. It is an efficient and feasible technology for recovering phosphorus from sludge incineration ash and can provide an important technical approach to alleviate the contradiction between supply and demand of phosphorus resources.
141
26
| 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
