生物电芬顿系统强化HMX废水的降解研究
Study on enhanced degradation of HMX wastewater by bio electro Fenton system
针对奥克托今(HMX)废水毒性强、难降解的问题,构建基于Fe@Co层状双氢氧化物修饰石墨毡(CoFe-LDH/GF)阴极的生物电芬顿系统(BEF)用于高效降解HMX模拟废水。通过水热法制备复合阴极并表征其形貌与化学态,以双室微生物燃料电池耦合电芬顿单元,考察曝气速率、pH及HMX初始浓度的影响,采用串联质谱法(LC-MS/MS)分析降解中间体并提出可能途径。结果表明,复合阴极具有多孔结构与均匀纳米活性位点,系统最大功率密度达457.72 mW/m2;最适条件下(pH=3、HMX=5 mg/L、曝气速率=0.3 L/min),24 h后HMX降解率95.1%、总有机碳去除率67.07%,HMX被有效降解并部分矿化。该耦合系统实现了对HMX的高效去除,为HMX废水的绿色处理提供了可行途径。
To address the high toxicity and recalcitrant nature of HMX wastewater,a bioelectrochemical Fenton system (BEF) based on a Fe@Co layered double hydroxide-modified graphite felt (CoFe-LDH/GF) cathode was developed for efficient degradation of HMX simulated wastewater.The composite cathode was prepared via hydrothermal synthesis,and its morphology and chemical state were characterized.A dual-chamber microbial fuel cell coupled with an electro-Fenton unit was employed to investigate the effects of aeration rate,pH,and initial HMX concentration.Degradation intermediates were analyzed using liquid chromatography-tandem mass spectrometry (LC-MS/MS),and potential degradation pathways were proposed.Results indicate the composite cathode exhibits a porous structure with uniform nano-active sites,achieving a maximum power density of 457.72 mW·m-2.Under optimal conditions (pH=3,HMX=5 mg/L,aeration rate=0.3 L/min),HMX degradation reached 95.1% and total organic carbon removal reached 67.07% after 24 hours,demonstrating effective degradation and partial mineralization of HMX.This coupled system achieves efficient HMX removal,providing a viable approach for the environmentally sound treatment of HMX-contaminated wastewater.
HMX / 生物电芬顿系统 / CoFe-LDH/石墨毡复合阴极 / 炸药废水降解 / 降解性能
HMX / bio-electro-fenton system / CoFe-LDH/graphite felt cathode / explosive wastewater degradation / degradation performance
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山西省自然科学基金(2023030212211113)
毁伤技术重点学科实验室开放研究基金(DXMBJJ2024-01)
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