淀粉衍生有机酸对水产养殖沉积物微生物燃料电池中多环芳烃去除的影响
Effect of starch-derived organic acids on the removal of polycyclic aromatic hydrocarbons in an aquaculture-sediment microbial fuel cell.
作者信息
Zhang Haochi, Chao Bo, Gao Xintong, Cao Xian, Li Xianning
机构信息
School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, China.
School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, China.
出版信息
J Environ Manage. 2022 Mar 14;311:114783. doi: 10.1016/j.jenvman.2022.114783.
This study constructed sediment microbial fuel cells (SMFCs) for polycyclic aromatic hydrocarbons (PAHs) removal in contaminated aquaculture sediment. Starch, a waste deposited in aquaculture sediment, was employed as the co-substrate for electricity generation and PAHs removal, and the effect of starch-derived organic acids on SMFC performance was assessed. The results indicated that sufficient starch promoted PAHs removal (69.9% for naphthalene, 55.6% for acenaphthene, and 46.8% for pyrene) in dual-chamber SMFC, whereas excessive starch attenuated SMFC performance because the organic acids accumulation reduced anode pH, decreased species diversity, and changed the microbial communities. The electricity generation and PAHs removal were positively correlated (R > 0.96), and both of them were related to Macellibacteroides belonging to Bacteroidetes. However, a larger single-chamber SMFC device did not obtain enhanced PAHs removal owing to the restricted "effective range" of the anode. Hence, more challenges need to be addressed to realize the practical application of SMFC.
本研究构建了沉积物微生物燃料电池（SMFCs），用于去除受污染水产养殖沉积物中的多环芳烃（PAHs）。淀粉作为水产养殖沉积物中沉积的一种废弃物，被用作发电和去除PAHs的共底物，并评估了淀粉衍生有机酸对SMFC性能的影响。结果表明，充足的淀粉促进了双室SMFC中PAHs的去除（萘去除率为69.9%，苊为55.6%，芘为46.8%），而过量的淀粉会削弱SMFC性能，因为有机酸的积累降低了阳极pH值，减少了物种多样性，并改变了微生物群落。发电与PAHs去除呈正相关（R>0.96），且二者均与拟杆菌门的类杆菌属有关。然而，由于阳极“有效范围”受限，较大的单室SMFC装置并未实现PAHs去除的增强。因此，要实现SMFC的实际应用，还需要应对更多挑战。
Zotero 插件