Full
Outline
In order to deeply understand the influence mechanism of pyrite oxidation products and residual CN－ on the adsorption of lead-containing particles on pyrite surface, the structure and composition changes of pyrite surface in the presence of oxidation and hydrocyanide were analyzed by constructing pyrite with different oxidation degrees, supplemented by solution chemical calculation, surface product quantity and quality and electrochemical characteristics analysis, as well as Zeta potential measurement. The adsorption amount of lead-containing particles was detected, and the inhibition or synergistic effect of Fe(Ⅲ)-O/OH and CN－ on lead adsorption behavior was clarified. The results show that the primary driving force for the physical adsorption of lead on the pyrite surface is the electrostatic attraction between positively charged lead-containing ions and negatively charged ions on the pyrite surface.Fe(Ⅲ)-O/OH reduces the amount of negative charge by increasing the positive charge on the pyrite surface, and thereby decreasing the electrostatic driving force for lead adsorption. However, CN－ can chemically react with Fe(Ⅲ)-O/OH to form Fe(CN)3, which is removed from the surface, ultimately increasing the electrostatic adsorption force between positively charged lead-containing ions and oxidized pyrite. The research results further reveal the influence mechanism of Fe(Ⅲ)-O/OH and CN－ on lead adsorption, which provides a new theoretical basis for the efficient recovery of gold from low-grade gold-bearing pyrite and the treatment of lead and cyanide pollution.
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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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