生物阴极型微生物燃料电池同步降解偶氮染料与产电性能研究

Simultaneous decolorization of azo dye and bioelectricity generation using a biocathode microbial fuel cell

构建了生物阴极型微生物燃料电池(BCMFC),研究了以葡萄糖-偶氮染料(活性艳红X-3B)为共基质条件下,BCMFC产电性能及偶氮染料的降解特性.结果表明,电能的产生源于BCMFC对葡萄糖的降解,共代谢下活性艳红X-3B的(ABRX3B)的生物降解是主要的脱色机理.当葡萄糖初始浓度为500mg·L-1(以COD计),ABRX3B浓度低于300mg·L-1时,功率密度维持50.7mW.m-2,最终脱色率在94.4%以上,而ABRX3B浓度的进一步提高对BCMFC产电会产生抑制作用.阳极液的COD去除率和UV-Vis光谱表明,ABRX3B的降解过程中,有中间产物的积累.共基质条件下,BCMFC可成功实现同步电能输出和高效脱色.

A bio-cathode microbial fuel cell （BCMFC） was constructed to investigate active brilliant red X-3B （ABRX3B） degradation and power generation. Glucose was used as co-substrute. The results demonstrated that the electricity was generated from the consumption of glucose rather than ABRX3B. Co-metabolism dependent biodegradation was the dominant mechanism of dye decolofization. The maximum power density was 50.7 mW·m^-2 and the final deeolorization ratio was above 94.4%. Neither was affected by ABRX3B concentrations up to 300 mg·L^-1. But further increase of the ABRX3B concentration showed an inhibitory effect on power generation. Accumulated intermediates were observed during ABRX3B biodegradation by analysis of COD removal and UV-Vis spectra of the anode chamber solution. MFC technology can be successfully used for simultaneous decolorization of an azo dye and bioelectricity generation.