微生物燃料电池降解RDX废水的性能和机理研究
基金项目:
山西省自然科学基金（No. 2023030212211113）；毁伤技术重点学科实验室开放研究基金（No. DXMBJJ2024-01）。
Study on the Performance and Mechanism of RDX Wastewater Degradation by Microbial Fuel Cell
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摘要:为探究微生物燃料电池（MFC）降解黑索今（RDX）废水的性能和机理，搭建了3个MFC装置，其进水分别为加碳源的RDX废水、RDX废水和经光催化预处理后的RDX废水。对不同进水条件下MFC对RDX废水的处理效果、MFC的产电性能和能量回收率进行对比，并对MFC降解RDX废水的机理进行了分析。结果表明：进水为经光催化预处理后的RDX废水时，MFC的RDX废水处理效果、综合产电性能和能量回收率均最好；进水为加碳源的RDX废水时，MFC性能居中；进水为RDX废水时，MFC性能最差。不同进水MFC对RDX的降解途径相同，推测其降解途径为：RDX先被代谢生成1, 5-二硝基-3-亚硝基-1, 3, 5-三氮杂环己烷（MNX），然后经过一系列代谢反应生成亚甲基二硝铵（MEDINA），最后再分解为小分子。
Abstract:In order to investigate the performance and mechanism of microbial fuel cells (MFC) in degrading RDX wastewater, three MFC devices were constructed, with carbon source added RDX wastewater, RDX wastewater, and photocatalytic pretreated RDX wastewater as the influent. The treatment effect of MFC on RDX wastewater, MFC power generation performance, and energy recovery rate were compared under different influent conditions, and the mechanism of RDX wastewater degradation by MFC was analyzed. The results show that when the influent is RDX wastewater pretreated by photocatalysis, the MFC has the best RDX wastewater treatment effect, comprehensive power generation performance, and energy recovery rate; When the influent is RDX wastewater with carbon source added, the MFC performance is in the middle; When the influent is RDX wastewater, the performance of MFC is the worst. The degradation pathway of RDX by different influent MFCs is the same, and it is speculated that the degradation pathway is as follows: RDX is first metabolized into 1, 5-dinitro-3-nitroso-1, 3, 5-triazacyclohexane (MNX), then undergoes a series of metabolic reactions to generate methylenedinitrate ammonium (MEDINA), and finally decomposes into small molecules.
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