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海底石油污染物在缺氧环境下导致其生物降解过程缓慢,对海洋环境造成长期危害.本文利用海底微生物燃料电池(BMFCs)原理,尝试通过电催化作用提高海底石油污染物的降解速率.对比测试了含油电池装置(BMFCs-A)与无油电池装置(BMFCs-B)的电化学性能,研究了石油污染物对电池性能的影响;比较了含油通路(BMFCs-A)和断路状态下(BMFCs-C)的石油降解率和细菌聚集量,分析了BMFCs对石油污染物降解的加速作用.结果表明,BMFCs-A和BMFCs-B阳极的交换电流密度分别为1.37×10-2A·m-2和1.50×10-3A·m-2,最大输出功率密度分别是105.79 m W·m-2和83.60 m W·m-2,BMFCs-A装置的抗极化能力增强,交换电流密度提高近9倍,最大输出功率密度提高1.27倍.BMFCs-A和BMFCs-C阳极表面的异养菌数量分别是(66±3.61)×107CFU·g-1和(7.3±2.08)×107CFU·g-1,细菌数量增加了8倍,高的异养菌数量导致石油降解加速进行,BMFCs的石油降解率是自然条件下的18.7倍.BMFCs在电化学性能提高的同时,加速石油污染物的降解.本文同时提出了一种海底微生物燃料电池对石油污染物加速降解的新模式.
Under the hypoxic condition, the seabed petroleum pollutants cause their slow biodegradation and long-term harm to the marine environment.This paper attempts to improve the degradation rate of seabed petroleum pollutants through the electrocatalysis by using the principle of seaweed microbial fuel cells (BMFCs) (BMFCs-A) and oil-free battery devices (BMFCs-B) were investigated. The effects of petroleum pollutants on battery performance were studied. The effects of oil-containing passageways (BMFCs-A) and BMFCs - C), and the accelerating effect of BMFCs on the degradation of petroleum pollutants was analyzed.The results showed that the exchange current density of BMFCs-A and BMFCs-B anodes were 1.37 × 10-2A · m-2 And 1.50 × 10-3A · m-2 respectively, the maximum output power density is 105.79 mW · m-2 and 83.60 mW · m-2, respectively. The polarization resistance of BMFCs-A device is enhanced and the exchange current density is increased by nearly 9 Times and the maximum output power density increased by 1.27 times.The number of heterotrophic bacteria on the anode surface of BMFCs-A and BMFCs-C were (66 ± 3.61) × 107CFU · g-1 and (7.3 ± 2.08) × 107CFU · g- The number of bacteria increased eight-fold, the high number of heterotrophic bacteria led to the accelerated degradation of petroleum, BMFCs of petroleum degradation Is 18.7 times .BMFCs under natural conditions in the electrochemical performance improved, accelerated degradation of oil contamination. This paper also proposes a new model for subsea petroleum pollutant microbial fuel cell to accelerate degradation.