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Increasing the recovery of heavy metal ions using two microbial fuel cells operating in parallel with no power output.
Environ Sci Pollut Res Int. 2016 Oct; 23(20):20368-20377.ES

Abstract

The present study aimed to improve the performance of microbial fuel cells (MFCs) by using an intermittent connection period without power output. Connecting two MFCs in parallel improved the voltage output of both MFCs until the voltage stabilized. Electric energy was accumulated in two MFCs containing heavy metal ions copper, zinc, and cadmium as electron acceptors by connection in parallel for several hours. The system was then switched to discharge mode with single MFCs with a 1000-Ω resistor connected between anode and cathode. This method successfully achieved highly efficient removal of heavy metal ions. Even when the anolyte was run in sequencing batch mode, the insufficient voltage and power needed to recover heavy metals from the cathode of MFCs can be complemented by the developed method. The average removal ratio of heavy metal ions in sequencing batch mode was 67 % after 10 h. When the discharge time was 20 h, the removal ratios of zinc, copper, and cadmium were 91.5, 86.7, and 83.57 %, respectively; the average removal ratio of these ions after 20 h was only 52.1 % for the control group. Therefore, the average removal efficiency of heavy metal ions increased by 1.75 times using the electrons stored from the bacteria under the open-circuit conditions in parallel mode. Electrochemical impedance data showed that the anode had lower solution resistance and polarization resistance in the parallel stage than as a single MFC, and capacitance increased with the length of time in parallel.

Authors+Show Affiliations

Beijing Engineering Research Center of Environmental Material for Water Purification, Beijing University of Chemical Technology, Beijing, 100029, China.Beijing Engineering Research Center of Environmental Material for Water Purification, Beijing University of Chemical Technology, Beijing, 100029, China.Caofeidian Office of Heibei Entry-Exit Inspection and Quarantine Bureau, Caofeidian, 063200, China.Beijing Engineering Research Center of Environmental Material for Water Purification, Beijing University of Chemical Technology, Beijing, 100029, China. hjzhx@mail.buct.edu.cn.Beijing Engineering Research Center of Environmental Material for Water Purification, Beijing University of Chemical Technology, Beijing, 100029, China.Beijing Engineering Research Center of Environmental Material for Water Purification, Beijing University of Chemical Technology, Beijing, 100029, China.Beijing Engineering Research Center of Environmental Material for Water Purification, Beijing University of Chemical Technology, Beijing, 100029, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27449020

Citation

Wang, Xiaohui, et al. "Increasing the Recovery of Heavy Metal Ions Using Two Microbial Fuel Cells Operating in Parallel With No Power Output." Environmental Science and Pollution Research International, vol. 23, no. 20, 2016, pp. 20368-20377.
Wang X, Li J, Wang Z, et al. Increasing the recovery of heavy metal ions using two microbial fuel cells operating in parallel with no power output. Environ Sci Pollut Res Int. 2016;23(20):20368-20377.
Wang, X., Li, J., Wang, Z., Tursun, H., Liu, R., Gao, Y., & Li, Y. (2016). Increasing the recovery of heavy metal ions using two microbial fuel cells operating in parallel with no power output. Environmental Science and Pollution Research International, 23(20), 20368-20377.
Wang X, et al. Increasing the Recovery of Heavy Metal Ions Using Two Microbial Fuel Cells Operating in Parallel With No Power Output. Environ Sci Pollut Res Int. 2016;23(20):20368-20377. PubMed PMID: 27449020.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Increasing the recovery of heavy metal ions using two microbial fuel cells operating in parallel with no power output. AU - Wang,Xiaohui, AU - Li,Jing, AU - Wang,Zhao, AU - Tursun,Hairti, AU - Liu,Rui, AU - Gao,Yanmei, AU - Li,Yuan, Y1 - 2016/07/24/ PY - 2016/03/10/received PY - 2016/06/05/accepted PY - 2016/7/28/pubmed PY - 2017/4/19/medline PY - 2016/7/25/entrez KW - Cadmium KW - Copper KW - Microbial fuel cell KW - Parallel KW - Wastewater treatment KW - Zinc SP - 20368 EP - 20377 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 23 IS - 20 N2 - The present study aimed to improve the performance of microbial fuel cells (MFCs) by using an intermittent connection period without power output. Connecting two MFCs in parallel improved the voltage output of both MFCs until the voltage stabilized. Electric energy was accumulated in two MFCs containing heavy metal ions copper, zinc, and cadmium as electron acceptors by connection in parallel for several hours. The system was then switched to discharge mode with single MFCs with a 1000-Ω resistor connected between anode and cathode. This method successfully achieved highly efficient removal of heavy metal ions. Even when the anolyte was run in sequencing batch mode, the insufficient voltage and power needed to recover heavy metals from the cathode of MFCs can be complemented by the developed method. The average removal ratio of heavy metal ions in sequencing batch mode was 67 % after 10 h. When the discharge time was 20 h, the removal ratios of zinc, copper, and cadmium were 91.5, 86.7, and 83.57 %, respectively; the average removal ratio of these ions after 20 h was only 52.1 % for the control group. Therefore, the average removal efficiency of heavy metal ions increased by 1.75 times using the electrons stored from the bacteria under the open-circuit conditions in parallel mode. Electrochemical impedance data showed that the anode had lower solution resistance and polarization resistance in the parallel stage than as a single MFC, and capacitance increased with the length of time in parallel. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/27449020/Increasing_the_recovery_of_heavy_metal_ions_using_two_microbial_fuel_cells_operating_in_parallel_with_no_power_output_ L2 - https://dx.doi.org/10.1007/s11356-016-7045-y DB - PRIME DP - Unbound Medicine ER -