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Sustainable power generation in microbial fuel cells using bicarbonate buffer and proton transfer mechanisms


, : Sustainable power generation in microbial fuel cells using bicarbonate buffer and proton transfer mechanisms. Environmental Science and Technology 41(23): 8154-8158

Phosphate buffer solution has been commonly used in MFC studies to maintain a suitable pH for electricity-generating bacteria and/or to increase the solution conductivity. However, addition of a high concentration of phosphate buffer in MFCs could be expensive, especially for wastewater treatment. In this study, the performances of MFCs with cloth electrode assemblies (CEA) were evaluated using bicarbonate buffer solutions. A maximum power density of 1550 W/m(3) (2770 mW/m(2)) was obtained at a current density of 0.99 mA/cm(2) using a pH 9 bicarbonate buffer solution. Such a power density was 38.6% higher than that using a pH 7 phosphate buffer at the same concentration of 0.2 M. Based on the quantitative comparison of free proton transfer rates, diffusion rates of pH buffer species, and the current generated, a facilitated proton transfer mechanism was proposed for MFCs in the presence of the pH buffers. The excellent performance of MFCs using bicarbonate as pH buffer and proton carrier indicates that bicarbonate buffer could be served as a low-cost and effective pH buffer for practical applications, especially for wastewater treatment.

US$19.90

DOI: 10.1021/es071739c


Other references

Ziegler, S.F., 2013: Reply: To PMID 22981788. Journal of Allergy and Clinical Immunology 131(3): 926-927

Vousden, M., 1998: The dark side. Nursing Times 93(45): 24-29

Liu, B.; Guo, Z.; Dong, H.; Daofeng, T.; Cai, Q.; Ji, B.; Zhang, S.; Wu, L.; Wang, J.; Wang, L.; Zhu, X.; Liu, Y.; Chen, Q., 2016: LRIG1, human EGFR inhibitor, reverses multidrug resistance through modulation of ABCB1 and ABCG2. In our previous study, we have found that leucine-rich repeats and immunoglobulin-like domains 1(LRIG1) can improve the chemosensitivity in U251 cells whereas the role of LRIG1 in multidrug resistance (MDR) remains unknown. Here, we reported that...

Beattie, B.B.; Outbred, N.L., 1970: Benzimidazole derivatives as post-harvest fungicides to control rotting of Pears, Cherries and Apricots. Wastage in pears inoculated with Penicillium expansum and Botrytis cinerea, and cherries and apricots with Sclerotinia fructicola was significantly reduced by fruit dips of thiabendazole (1000 ppm) or benomyl (500 ppm). Parbendazole (5-n-butyl-2-i...

Haddad, N., 2000: Corridor length and patch colonization by a butterfly, Junonia coenia. The effect of corridors on patch colonization by the butterfly Junonia coenia was investigated. Corridors are proposed to reduce isolation and increase population persistence in fragmented landscapes. Neither corridors nor distance had a significa...

Madhuri, T.K.; Kremer, C., 2011: Early gynaecological assessment following Stevens-Johnson syndrome/toxic epidermal necrolysis. Journal of Obstetrics and Gynaecology 30(8): 871-872

Standal, S.W.; Va.D.R Veen, F., 1957: Length of therapy in relation to counselor estimates of personal integration and other case variables. Journal of Consulting Psychology 21(1): 1-9

Narayanappa, S.; Dayananda, S.; Dakshayini, M.; Gangasagara, S.Babu.; Prabhakaran, V.C., 2010: Conjunctival inclusion cysts following small incision cataract surgery. The occurrence of acquired conjunctival inclusion cysts following various ophthalmic surgeries such as strabismus surgery, scleral buckling, pars plana vitrectomy, ptosis surgery and phacoemulsification has been reported. We report two cases of co...

Meinert, F., 1870: Om dobbelte saedgange hos Insekter; fortstalle til Forficulernes anatomi. Nat: 278-294

Hiern M.N., 1969: Quartzite deposit, sections 49W, 49E, hundred of Booyoolie. Proterozoic quartzite and arkosic quartzite, closed synclinal fold, reserves, diamond drilling data, South Australia.