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Two typical PA membranes, m-phenylenediamine-trimesoyl chloride and piperazine-trimesoyl chloride, are introduced and their latest chlorine destruction mechanisms are analyzed in depth. On this basis, the chlorine-resistant modification methods for these two membranes are further discussed, including changing the monomer structure, intrinsic doping techniques, physical coating methods and chemical grafting methods. The latest research research advances in the field of chlorinated PA membrane remediation are briefly discussed, including the reduction method after initial chlorination and the remediation with repair agent after chlorination degradation. The analysis shows that the development of chlorine-resistant PA membranes is still facing great challenges, and the research on chlorine-resistant modification of PA membranes should be carried out without sacrificing its separation performance, taking into account all other properties of the membrane, and flexibly utilizing various modification methods.
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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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