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Outline
This study established a static simulation experimental system, using sodium hypochlorite (NaClO) as a representative disinfectant and iron-oxidizing bacteria (IOB) strain LSS-1as a representative corrosive microorganism, to investigate their combined effects on total iron concentration, corrosion rate, electrochemical characteristics during corrosion, and physicochemical properties of corrosion products. The results indicated that the coupling of NaClO and LSS-1 promoted the corrosion of cast iron coupons. Under the condition of LSS-1 with 4.00mg/L NaClO, the corrosion rate after 30 days increased by 0.06mm/a, and the average total iron concentration increased by 5.76mg/L compared to the condition without LSS-1 and NaClO. Under the coupled condition, the self-corrosion potential (E0) shifted negatively, and the current density (I0) increased. Furthermore, the main corrosion products generated under the coupled condition included α-FeOOH, β-FeOOH, γ-FeOOH, Fe2O3, Fe3O4, and CaCO3.
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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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