Membrane and Water Treatment

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Continuous removal of heavy metals by coupling a microbial fuel cell and a microbial electrolytic cell

  • Xie, Guo R. (Department of Applied Chemistry, Daejeon University) ;
  • Choi, Chan S. (Department of Applied Chemistry, Daejeon University) ;
  • Lim, Bong S. (Department of Environmental Engineering, Daejeon University) ;
  • Chu, Shao X. (Department of Environmental Engineering, Daejeon University)
  • Received : 2019.07.17
  • Accepted : 2020.05.22
  • Published : 2020.07.25
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Abstract

This work aims at studying the feasibility of continuous removal of mixed heavy metal ions from simulated zinc plating wastewaters by coupling a microbial fuel cell and a microbial electrolysis cell in batch and continuous modes. The discharging voltage of MFC increased initially from 0.4621 ± 0.0005 V to 0.4864 ± 0.0006 V as the initial concentration of Cr6+ increased from 10 ppm to 60 ppm. Almost complete removal of Cr6+ and low removal of Cu2+ occurred in MFC of the MFC-MEC-coupled system after 8 hours under the batch mode; removal efficiencies (REs) of Cr6+ and Cu2+ were 99.76% and 30.49%. After the same reaction time, REs of nickel and zinc ions were 55.15% and 76.21% in its MEC. Cu2+, Ni2+, and Zn2+ removal efficiencies of 54.98%, 30.63%, 55.04%, and 75.35% were achieved in the effluent within optimum HRT of 2 hours under the continuous mode. The incomplete removal of Cu2+, Ni2+ and Zn2+ ions in the effluent was due to the fact that the Cr6+ was almost completely consumed at the end of MFC reaction. After HRT of 12 hours, at the different sampling locations, Cr6+ and Cu2+ removal efficiencies in the cathodic chamber of MFC were 89.95% and 34.69%, respectively. 94.58%, 33.95%, 56.57%, and 75.76% were achieved for Cr6+, Cu2+, Ni2+ and Zn2+ in the cathodic chamber of MEC. It can be concluded that those metal ions can be removed completely by repeatedly passing high concentration of Cr6+ through the cathode chamber of MFC of the MFC-MEC-coupled system.

Keywords

Acknowledgement

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF-2015R1D1A1A01059542) sponsored by the Ministry of Education, Science and Technology of Korea. We are grateful to Ms. Jane E. Choi for English correction and organization of this paper.

References

  1. Choi, C. and Cui, Y. (2012), "Recovery of silver from wastewater coupled with power generation using a microbial fuel cell", Bioresour. Technol., 107, 522-525. https://doi.org/10.1016/j.biortech.2011.12.058.
  2. Choi, C. and Hu, N. (2013), "The modeling of gold recovery from tetrachloroaurate wastewater using a microbial fuel cell", Bioresour. Technol., 133, 589-598. https://doi.org/10.1016/j.biortech.2013.01.143.
  3. Choi, C., Hu, N. and Lim, B. (2014), "Cadmium recovery by coupling double microbial fuel cells", Bioresour. Technol., 170, 361-369. https://doi.org/10.1016/j.biortech.2014.07.087.
  4. Mahmood, T., Hameed, T., Siddiqui, N.R., Mumtaz, A., Safdar, N. and Masud T. (2010), "Effect of environmental changes on phytic acid content of wheat (Triticum Aestivum)", Pakistan J. Nutr., 9(5), 447-451. https://doi.org/10.3923/pjn.2010.447.451
  5. Modin, O., Wang, X., Wu, X., Rauch, S. and Fedje, K.K. (2012), "Bioelectrochemical recovery of Cu, Pb, Cd, and Zn from dilute solutions", J. Hazard. Mater., 235-236, 291-297. https://doi.org/10.1016/j.jhazmat.2012.07.058.
  6. Mu, Y., Rozendal, R.A., Rabaey, K. and Keller, J. (2009), "Nitrobenzene removal in bioelectrochemical systems", Environ. Sci. Technol., 43(22), 8690-8695. https://doi.org/10.1021/es9020266.
  7. Hu, N., Cui, Y. and Choi, C. (2019), "Recovery of platinum-group metals using a microbial fuel cell", Trends in Diabetes and Metab., https://doi.org/10.15761/TDM.1000115.
  8. Schwarzenbach, R.P., Escher, B.I., Fenner, K., Hofstetter, T.B. and Johnson, C.A. (2006), "The challenge of micropollutants in aquatic systems", J. Science, 313(5790), 1072-1077. https://doi.org/10.1021/es9020266.
  9. Wang, G., Huang, L.P. and Zhang, Y.F. (2008), "Cathodic reduction of hexavalent chromium [Cr(VI)] coupled with electricity generation in microbial fuel cells", J. Biotechnol. Lett., 30(11), 1959-1966. https://doi.org/10.1007/s10529-008-9792-4.
  10. Wang, Z., Lim, B. and Choi, C. (2011), "Removal of $Hg^{2+}$ as an electron acceptor coupled with power generation using a microbial fuel cell", Bioresour. Technol., 102(10), 6304-6307. https://doi.org/10.1016/j.biortech.2011.02.027.
  11. Wang Z., Lim, B., Lu, H., Fan, J. and Choi, C. (2010), "Cathodic reduction of $Cu^{2+}$ and electric power generation using a microbial fuel cell", Bull. Korean Chem. Soc., 31(7), 2025-2030. https://doi.org/10.5012/bkcs.2010.31.7.2025
  12. Yang Y., Choi C., Xie G., Park J.-D., Ke S., Yu J.-S., Zhou J. and Lim B. (2019), "Electron transfer interpretation of the biofilm-coated anode of a microbial fuel cell and the cathode modification effects on its power", Bioelectrochem., 127, 94-103. https://doi.org/10.1016/j.bioelechem.2019.02.004.