Polycyclic Aromatic Hydrocarbons (PAHs) Degradation and Detoxification of Water Environment in Single-chamber Air-cathode Microbial Fuel Cells (MFCs)
Polycyclic Aromatic Hydrocarbons (PAHs) Degradation and Detoxification of Water Environment in Single-chamber Air-cathode Microbial Fuel Cells (MFCs)
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DOI：
10.1002/fuce.201700124
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发表时间：
2017-10-01
期刊：
影响因子：
2.8
通讯作者：
Jannelli, E.
中科院分区：
文献类型：
--
作者：
Gambino, E.;Toscanesi, M.;Jannelli, E.
研究了微生电作用对水环境中假单胞菌科、芽孢杆菌科、葡萄球菌科和肠杆菌科细菌降解和解毒多环芳烃的影响。单室、空气阴极MFC和生物反应器填充有接种在400 mL Winogradsky盐溶液中的微生物池（10（7）-10（8）CFU mL（-1）），所述Winogradsky盐溶液不含除萘（80 ppm）、菲（40 ppm）、芘（40 ppm）、苯并（a）芘（20 ppm）之外的其它碳和能量源。MFC和生物反应器在25 ° C下运行十三周。功率密度（PD）和电流密度（CD）输出以及多环芳烃降解率进行了测量。采用EC 1、EC20、EC 50、LOEC和NOEC等方法对多环芳烃悬浮液对近头状针缝藻的毒性效应进行了研究。结果表明，PD和CD输出的显著变化，最高PD为300 mW m（-3）和25 mA m（-3）。5周后，MFC中的总体多环芳烃浓度下降了90%。接种细菌的MFC（MFC 2）在11周后COD和TOC去除率分别达到62%和73%。生态毒理学试验表明，当细菌存在时，微生物燃料的毒性作用低于近头状无绿藻。微生电只是加速了微生物的代谢，而不是利用多环芳烃与石墨电极的相互作用。
The influence of microelectrogenesis on PAHs degradation and detoxification operated by Pseudomonadaceae, Bacillaceae, Staphylococcaceae and Enterobacteriaceae was investigated in water environment. Single chamber, air-cathode MFCs and bioreactors were filled with the microbial pool (10(7)-10(8) CFUmL(-1)) inoculated in a 400mL Winogradsky saline solution containing no other carbon and energy source than naphthalene (80 ppm), phenanthrene (40 ppm), pyrene (40 ppm), benzo(a)pyrene (20 ppm). MFCs and bioreactors operated at 25 degrees C for thirteen weeks. Power Density (PD) and Current Density (CD) outputs as well as PAHs degradation rate were measured. The toxic effect of PAHs suspension vs.Raphidocelis subcapitata was quantified by EC1, EC20, EC50, LOEC and NOEC calculations. The results showed a significant variability in PD and CD outputs, with highest PD of 300 mW m(-3) and 25 mA m(-3). After 5 weeks, the overall PAHs concentration in MFCs decreased of a 90%. COD and TOC removal respectively of 62% and 73% after 11 weeks was achieved in MFC inoculated with bacteria (MFC2). Ecotoxicological tests showed for MFCs a lower toxic effect vs.P.subcapitata when bacteria are present. Microelectrogenesis just sped up microbial metabolism rather than take advantage from the interaction of PAHs with graphite electrodes.