增强生物电化学系统中上层水体向沉积物的磷通量。
Enhanced phosphorus flux from overlying water to sediment in a bioelectrochemical system.
机构信息
Department of Bioengineering, Qilu University of Technology, Jinan 250353, PR China.
Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, PR China.
出版信息
Bioresour Technol. 2016 Sep;216:182-7. doi: 10.1016/j.biortech.2016.05.074. Epub 2016 May 21.
This report proposed a novel technique for the regulation of phosphorus flux based on a bioelectrochemical system. In the simulated water system, a simple in situ sediment microbial fuel cell (SMFC) was constructed. SMFC voltage was increased with time until it was 0.23V. The redox potential of the sediment was increased from -220mV to -178mV during the process. Phosphorus concentration in the water system was decreased from 0.1mg/L to 0.01mg/L, compared with 0.09mg/L in the control. The installation of a SMFC produced an external current and internal circuit, which promoted the transfer of phosphate in overlying water to the sediment, enhanced the microbial oxidation of Fe(2+), and increased the formation of stable phosphorus in sediment. In conclusion, phosphorus flux from the overlying water to sediment was enhanced by SMFC, which has the potential to be used for eutrophication control of water bodies.
本报告提出了一种基于生物电化学系统的新型磷通量调控技术。在模拟水体中，构建了简单的原位沉积物微生物燃料电池（SMFC）。SMFC 电压随时间增加，直至达到 0.23V。在此过程中，沉积物的氧化还原电位从-220mV 增加到-178mV。与对照组中的 0.09mg/L 相比，水体中的磷浓度从 0.1mg/L 降低到 0.01mg/L。SMFC 的安装产生了外部电流和内部电路，促进了水体中磷酸盐向沉积物中的转移，增强了 Fe(2+)的微生物氧化，并增加了沉积物中稳定磷的形成。总之，SMFC 增强了水体上层水中磷向沉积物中的通量，有望用于水体富营养化控制。
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