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Leaching solution with a mass concentration of 256.1 mg/L was obtained by using aqua regia to recover the gold from the CPU, and the gold in the acid leaching solution was recovered by solvent extraction. The effects of extractant type, concentration, extraction time, extraction phase ratio and extraction temperature on the gold extraction were investigated. The results show that with 80% dibutylcarbitol as the extraction agent, the gold extraction rate can reach 99.86% under the condition of VO∶VA=1∶4 and room temperature for 10 min. The sponge gold product can be obtained by stripping with oxalic acid. The recovery effect is good. The method has a certain popularization value in the comprehensive recovery of gold-containing electronic solid waste such as CPU.
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| 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 |
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