LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
Bioresour Technol. 2013 Feb;130:218-23. doi: 10.1016/j.biortech.2012.12.050. Epub 2012 Dec 27.
Sulphate reduction in a biological cathode and physically separated from biological organic matter oxidation has been studied in this paper. The bioelectrochemical system was operated as microbial fuel cell (for bioelectricity production) to microbial electrolysis cell (with applied voltage). Sulphate reduction was not observed without applied voltage and only resulted when the cathodic potential was poised at -0.26V vs. SHE, with a minimum energy requirement of 0.7V, while maximum removal occurred at 1.4V applied. The reduction of sulphate led to sulphide production, which was entrapped in the ionic form thanks to the high biocathode pH (i.e. pH of 10) obtained during the process.
本文研究了在生物阴极中与生物有机物氧化相分离的硫酸盐还原。该生物电化学系统作为微生物燃料电池（用于生物电能生产）运行，然后转化为微生物电解池（施加电压）。在没有施加电压的情况下未观察到硫酸盐还原，仅当阴极电势稳定在相对于 SHE 的-0.26V 时才会发生还原，最低能量需求为 0.7V，而在施加 1.4V 时最大去除率。硫酸盐的还原导致了硫化物的产生，由于在该过程中获得了高生物阴极 pH（即 10 的 pH），因此硫化物以离子形式被捕获。
