Faculty of Sustainability, Environment and Life Sciences, Murdoch University, South Street, Perth, WA 6150, Australia.
Bioresour Technol. 2011 Oct;102(20):9691-6. doi: 10.1016/j.biortech.2011.07.100. Epub 2011 Aug 5.
This work examines a pH control method using ammonium (NH(4)(+)) as a sustainable proton shuttle in a CEM-equipped BES. Current generation was sustained by adding NH(3) or ammonium hydroxide (NH(4)OH) to the anolyte, controlling its pH at 7. Ammonium ion migration maintained the catholyte pH at approximately 9.25. Such NH(4)(+)/NH(3) migration accounted for 90±10% of the ionic flux in the BES. Reintroducing the volatilized NH(3) from the cathode into the anolyte maintained a suitable anolyte pH for sustained microbial-driven current generation. Hence, NH(4)(+)/NH(3) acted as a proton shuttle that is not consumed in the process.
本工作研究了一种在配备 CEM 的 BES 中使用铵 (NH(4)(+)) 作为可持续质子穿梭剂的 pH 控制方法。通过向阳极电解液中添加氨 (NH(3)) 或氢氧化铵 (NH(4)OH) 来维持电流产生，控制其 pH 值为 7。铵离子迁移将阴极电解液的 pH 值维持在约 9.25。在 BES 中，这种 NH(4)(+)/NH(3) 迁移占离子通量的 90±10%。将从阴极挥发的 NH(3)重新引入阳极电解液中，可维持适合微生物驱动电流产生的阳极电解液 pH 值。因此，NH(4)(+)/NH(3) 充当质子穿梭剂，在该过程中不会被消耗。
