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The perchlorinated zinc ash contains zinc metal, a small amount of heavy metals and harmful elements chlorine. In order to reduce the chlorine content in the perchlorinated zinc ash, the removal effect of water washing and ammonia washing on the impurities in the perchlorinated zinc ash was compared and studied. The influence of ammonia concentration, liquid volume to solid mass ratio and washing temperature on the precipitation rate of zinc in the ammonia washing process was investigated by single factor test, and the optimal ammonia washing conditions were determined by orthogonal test. The results show that the removal rates of Cl, Na and K are more than 99% and the precipitation rate of Zn is 98.7% under the conditions of ammonia concentration of 0.05%, liquid volume to solid mass ratio of 6 mg/1 L and reaction temperature of 30 ℃.
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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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