期刊
ENVIRONMENTAL TECHNOLOGY
卷 39, 期 9, 页码 1144-1157出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2017.1323955
关键词
Sediment microbial fuel cell; Vallisneria spiralis; coupled system; phosphorus reduction; anode bacterial community
资金
- National Natural Science Foundation of China [51308530]
- Major Science and Technology Program for Water Pollution Control and Treatment [2012ZX07101007-005]
- National Key Research and Development Plan of China [2016YFC0500403-03]
- Chinese Academy of Sciences [KFZD-SW-302-02]
The phosphorus reduction in water column was attempted by integrating sediment microbial fuel cells (SMFCs) with the submerged macrophyte Vallisneria spiralis. A comparative study was conducted to treat simulated water rich in phosphate with a control and three treatments: SMFC alone (SMFC), submerged macrophytes alone (macophyte), and combined macrophytes and fuel cells (M-SMFC). All treatments promoted phosphorus flux from the water column to sediments. Maximum phosphorus reduction was obtained in proportion to the highest stable phosphorus level in sediments in M-SMFC. For the initial phosphate concentrations of 0.2, 1, 2, and 4mg/L, average phosphate values in the overlying water during four phases decreased by 33.3% (25.0%, 8.3%), 30.8% (5.1%, 17.9%), 36.5% (27.8%, 15.7%), and 36.2% (0.7%, 22.1%) for M-SMFC (macrophyte, SMFC), compared with the control. With macrophyte treatment, the obvious phosphorus release from sediments was observed during the declining period. However, such phenomenon was significantly inhibited with M-SMFC. The electrogenesis bacteria achieved stronger phosphorus adsorption and assimilation was significantly enriched on the closed-circuit anodes. The higher abundance of Geobacter and Pseudomonas in M-SMFC might in part explain the highest phosphorus reduction in the water column. M-SMFC treatment could be promising to control the phosphorus in eutrophic water bodies.
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