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Fluoride-containing industrial wastewater was treated by using a composite coagulant of polymerized aluminum chloride (PAC) and polyacrylamide (PAM), and effects of PAC dosage, PAM concentration, pH value, reaction time and stirring speed on fluoride removal efficiency were explored. The results show that by adding 4 400 mg/L PAC, with PAM concentration of 1 mg/L, solution with pH of 7.0, reaction time of 20 min and stirring speed of 300 r/min, the fluoride removal rate can reach 97.98%, leading to the residual concentration of fluoride ion at only 0.81 mg/L. However, the presence of impurity ions can reduce the fluoride removal rate by PAC.
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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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