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Fe3O4@SiO2@IL was prepared by immobilizing imidazole based ionic liquids on the surface of magnetic nanoparticles with impregnation method, and was then used to remove Hg2+ in the water. The effects of pH value, adsorption time, and adsorbent dosage on the Hg2+ removal rate were investigated. The results show that Fe3O4@SiO2@IL can have a wide application, and Hg2+ removal rate can exceed 99.1% with pH of 7.2-9.5. Fe3O4@SiO2@IL presents a high rate of Hg2+ adsorption, and the adsorption can reach equilibrium within 90 minutes. For 25 mL Hg2+ solution with a concentration of 2 μg/mL, Hg2+ can be completely removed by adding 20 mg of adsorbent. The adsorption isotherms of Fe3O4@SiO2@IL indicate that the saturated adsorption capacity of the adsorbent for Hg2+ is 548.37 mg/g.
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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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