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| Effect of FeS on reactive brilliant red X-3B removal effect and degradation process in CW-MFC system |
| ZHAO Lian-fang1,2, YU Xue-qing1, LU Zong-ren3, LIU Cheng1, LI Ying1 |
1. College of Environment, Hohai University, Nanjing 210098, China;
2. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake, Ministry of Education, Nanjing 210098, China;
3. Shanghai Survey and Design Research Institute Co., Ltd, Shanghai 200335, China |
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Abstract In the self-constructed wetland-microbial fuel cell (CW-MFC), the effect of FeS on the decolorization and degradation process of reactive brilliant red X-3B was studied by using gravel filter as a control. The results showed that the addition of FeS in the underlying region could significantly improve the decolorization effect and the system electricity generation performance of CW-MFC on reactive brilliant red X-3B. The addition of FeS made the system decolorization rate reach 99.83% under the conditions of influent of 200mg/L reactive brilliant red X-3B and glucose of 100mg/L. The maximum power density in FeS group reached 0.849W/m3 with influent of 100mg/L reactive brilliant red X-3B and glucose of 200mg/L. The decolorization of reactive brilliant red X-3B in the system mainly occurred in the bottom layer and anode regions, which could be seen from the UV full-wavelength scanning and GC-MS spectrum that FeS promoted the breakage of azo double bonds in this region, and was conducive to the further degradation of the decolorization products aniline, triazine structure and naphthalene ring structure.
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Received: 16 December 2021
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