冯俊生,姚海祥,蔡晨,申荣艳,王晓红,张郓.CuO强化MFC活化过硫酸盐降解偶氮染料废水及同步产电研究[J].环境科学学报,2019,39(4):1157-1165
CuO强化MFC活化过硫酸盐降解偶氮染料废水及同步产电研究
- Study on persulfate activated by microbial fuel cell and enhanced by CuO to degrade methyl orange and simultaneous electricity generation
- 基金项目：江苏省学产研前瞻性联合研究项目（No.BY2015027-06）
- 冯俊生
- 常州大学环境与安全工程学院, 常州 213164
- 姚海祥
- 常州大学环境与安全工程学院, 常州 213164
- 蔡晨
- 常州大学环境与安全工程学院, 常州 213164
- 申荣艳
- 常州大学环境与安全工程学院, 常州 213164
- 王晓红
- 常州大学环境与安全工程学院, 常州 213164
- 张郓
- 常州大学环境与安全工程学院, 常州 213164
- 摘要：利用CuO强化微生物燃料电池（MFC）活化过硫酸盐（PDS），提高MFC对偶氮染料的降解率及同步产电性能.考察初始pH、CuO浓度、PDS浓度等因素对降解率及同步产电的影响.实验结果表明，最佳反应条件：初始pH为3.0，CuO浓度为0.6 mmol·L-1，PDS浓度为2 mmol·L-1时，反应4 h后MO降解率达到99.3%.比未投加CuO时MO降解率提高12.8%；MFC最大输出功率密度从53.0 mW·m-2增大到103.5 mW·m-2，输出功率密度提高1.95倍；对应的表观内阻从484.1 Ω减小到318.6 Ω，下降幅度达到34.1%.降解机理研究表明，MO降解过程中的主要活性物质为SO4-·和少量·OH.反应前后水样的紫外-可见光谱对比显示，MO降解过程中偶氮键率先断裂，然后生成含苯环类的中间产物，最终得到矿化.
- Abstract：The persulfate (PDS) activated by microbial fuel cell (MFC) and enhanced by CuO was used to improve the degradation of methyl orange (MO) and simultanuous power generation. The effects of initial pH, CuO concentration and PDS concentration on degradation rate and simultaneous electricity generation were investigated. The experimental results show that the optimal reaction conditions were as follows:under initial pH 3.0, CuO concentration at 0.6 mmol·L-1, PDS concentration at 2 mmol·L-1, the degradation rate of methyl orange (MO) reached 99.3% after 4 h, 12.8% higher than that without CuO. The maximum output power of MFC increased by 1.95 times, from 53.0 mW·m-2 to 103.5 mW·m-2. The corresponding apparent resistance reduced from 484.1 Ω to 318.6 Ω,with a drop of 34.1%. Previous studies have found that the main active substances in the process of MO degradation were SO4-· and a small amount of·OH. The UV-visible spectrum of the samples before and after the reaction shows that during the degradation of MO, the azo bond was first broken, forming the intermediate products containing benzene rings, which were finally mineralized.
