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In this study, a method for control of humic acid-cadmium composite pollution using MXene/PMS process in the presence of trace Fe(III) was proposed. The results showed that the removal efficiency of Cd2+ by MXene material in the presence of humic acid decreased from 70% to 48%, and addition of 0.5µmol/L Fe(III) and 50µmol/L peroxymonosulfate increased the removal efficiency of Cd2+ to above 60%. too much or less PMS inhibited the removal of Cd2+. Reducing Fe(III) from 1.0µmol/L to 0.3µmol/L promoted the removal of Cd2+. The strong reducing property of MXene material and its strong interaction with metal ions triggered the Fe(III)/Fe(II) cycle and inhibited the hydrolysis of iron ions, realizing the efficient removal of humic acid-cadmium composite pollution under neutral conditions. The reactive species generated in the reaction system were mainly hydroxyl radicals and sulfate radicals. Under the background condition of Xijiang river, this technique maintained good removal effect.
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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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