RONG Hui (1983-), male, Professor. E-mail: hrong@tcu.edu.cn
To address the technical challenge of the slow repair rate of microbial-based exo-remediation materials, microbial-sodium alginate exo-remediation materials were prepared by adding different concentrations (0.0%, 0.5%, 1.0%, 1.5% and 2.0%) of sodium alginate to the existing microbial exo-remediation material, and analyzed their properties and synergistic exo-remediation effect. The results show that the viscosity of the microbial-sodium alginate exo-remediation materials increases, while the flow rate decreases as sodium alginate concentration increases; the repair product formed by the microbial-sodium alginate external repair material is white in color and has a certain elasticity, and the composition of the repair product is mainly calcium carbonate, while the calcium alginate gel formed is filled in the gaps between calcium carbonate particles; and for different crack widths, the microbial calcium alginate hydrogel formed by microbial-sodium alginate external repair material can achieve instant plugging, resulting in a lower water penetration coefficient and a higher compressive strength. In particular, the optimum repair effect for 1.0 mm cracks can be achieved at a sodium alginate concentration of 0.5%, which reduces the water penetration coefficient from 9.76 to 0 under a maintained water pressure of 1 kPa, and achieves a strength recovery rate at 7 d of 22.7%.
| 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 |