摘要
采用化学原位聚合法制备了蒽醌-2,6-二磺酸钠(anthraquinone-2,6-disulfonic acid disodium salt,AQDS)掺杂的聚吡咯(polypyrrole,PPy)修饰阴极.电化学交流阻抗谱(EIS)和塔菲尔(Tafel)测试发现,与空白阴极和PPy修饰阴极相比,PPy-AQDS修饰阴极的内阻更低,电极反应速率更高.在校园浅水湖中以空白阴极,PPy修饰阴极和PPy-AQDS修饰阴极运行沉积型微生物燃料电池(sediment microbial fuel cell,SMFC)30 d.实验结果表明,PPy-AQDS修饰阴极可以提高SMFC体系的产电能力并提高沉积物中有机质的去除效率.与空白阴极SMFC体系相比,PPy-AQDS修饰阴极SMFC体系的最大功率密度增大了3.7倍,阳极表面沉积物中烧失量(loss on ignition,LOI)和易氧化有机质(readily oxidizable organic matter,ROOM)去除率分别由5.5%和5.5%增大到14.4%和31.9%.
Anthraquinone-2,6-disulfonic acid disodium salt （AQDS）-doped polypyrrole （PPy） cathode was synthesized through in situ polymerization route. Electrochemical impedance spectroscopy （EIS） and Tafel plots of the modified cathodes were tested and the PPy-AQDS cathode exhibited the lowest internal resistance and the highest electrode reaction rate. Three sediment microbial fuel cells （SMFC） with blank cathode, PPy cathode and PPy-AQDS cathode were placed in a shallow lake and generated current for 30 days. The experiment results revealved that PPy-AQDS cathode provided the most profound effect on improving the performance of SMFC and promoted the removal efficiency of organics in sediment. The SMFC with PPy-AQDS cathode showed the highest maximum power density which was 3.7 times higher than that of SMFC with blank cathode ; Meanwhile, it significantly increased the removal efficiency of the loss on ignition （LOI） and the readily oxidizable organic matter （ROOM） of sediment on the surface of anodes from 5.5% and 5.5% to 14. 4% and 31.9%, respectively.
出处
《环境化学》
CAS
CSCD
北大核心
2013年第10期1851-1855,共5页
Environmental Chemistry
基金
国家自然科学基金项目(21076097,21206058)
水体污染控制与治理科技重大专项(2012ZX07101-013-04)
中央高校基本科研业务费专项资金资助(JUSRP111A09)资助
