A new clean approach for production of cobalt dihydroxide from aqueous Co(II) using oxygen-reducing biocathode microbial fuel cells

Huang, Liping; Liu, Yaxuan; Yu, Lihua; Quan, Xie; Chen, Guohua

doi:10.1016/j.jclepro.2014.08.018

Cited by 64 publications

(34 citation statements)

References 17 publications

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“…5.0-7.0) is appreciably required to achieve a complete Cu (II) reduction on the cathodes of MFCs and thus avoids the adverse effects of Cu(II) and more acidic pHs on the electrotrophic activities in the connected MECs. In addition and in terms of product purity, the formation of pure copper on the cathodes of MFCs is heavily dependent on an anaerobic environment [2,31,32] whereas cobalt deposited on the biocathodes of MECs may have somewhat been chelating with the cellular surface and thus heavily depends on the characteristics of specific bacteria [3]. Relationship between the bacterial community and the specific mechanism cannot be concluded based on the species level results reported here.…”

Section: Discussionmentioning

confidence: 78%

“…When a plot of the peak current versus ν is linear, the results indicate "thinfilm behavior", and therefore that electron transfer from the electrode to the bacteria is slower than intracellular reactions. If the peak is current proportional to ν 1/2 , this indicates a diffusion-controlled regime [30,31]. The current was not limited by diffusion and showed a linear dependency to the scan rate ( Fig.…”

Section: Performance Of Mecs With Biocathodes and Driven By Mfcsmentioning

confidence: 95%

“…The peak currents were examined at different scan rates (ν) (1-10 mV•s -1 ) to determine the rate limiting step [30,31]. When a plot of the peak current versus ν is linear, the results indicate "thinfilm behavior", and therefore that electron transfer from the electrode to the bacteria is slower than intracellular reactions.…”

Section: Performance Of Mecs With Biocathodes and Driven By Mfcsmentioning

confidence: 99%

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Microbial electrolysis cells with biocathodes and driven by microbial fuel cells for simultaneous enhanced Co(II) and Cu(II) removal

Shen

Sun

Huang

et al. 2015

Front. Environ. Sci. Eng.

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Cobalt and copper recovery from aqueous Co (II) and Cu(II) is one critical step for cobalt and copper wastewaters treatment. Previous tests have primarily examined Cu(II) and Co(II) removal in microbial electrolysis cells (MECs) with abiotic cathodes and driven by microbial fuel cell (MFCs). However, Cu(II) and Co(II) removal rates were still slow. Here we report MECs with biocathodes and driven by MFCs where enhanced removal rates of 6.0AE0.2 mg•L -1 •h -1 for Cu(II) at an initial concentration of 50 mg•L -1 and 5.3AE0.4 mg•L -1 h -1 for Co(II) at an initial 40 mg•L -1 were achieved, 1.7 times and 3.3 times as high as those in MECs with abiotic cathodes and driven by MFCs. Species of Cu(II) was reduced to pure copper on the cathodes of MFCs whereas Co(II) was removed associated with microorganisms on the cathodes of the connected MECs. Higher Cu(II) concentrations and smaller working volumes in the cathode chambers of MFCs further improved removal rates of Cu(II) (115.7 mg•L -1 •h -1 ) and Co(II) (6.4 mg•L -1

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Section: Discussionmentioning

confidence: 78%

Section: Performance Of Mecs With Biocathodes and Driven By Mfcsmentioning

confidence: 95%

Section: Performance Of Mecs With Biocathodes and Driven By Mfcsmentioning

confidence: 99%

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Microbial electrolysis cells with biocathodes and driven by microbial fuel cells for simultaneous enhanced Co(II) and Cu(II) removal

Shen

Sun

Huang

et al. 2015

Front. Environ. Sci. Eng.

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“…This dissolved oxygen could have accounted for 14.1% of the coulombs in the influent with each metal of 5 mg L -1 , and 10.5% at each metal of 10 mg L -1 , in agreement with the previous reports. [8,22,39,50] These electrons consumed through residual dissolved oxygen reduction may also explain the fate of cathode electrons.…”

Section: Resultsmentioning

confidence: 99%

Continuous flow operation with appropriately adjusting composites in influent for recovery of Cr(VI), Cu(II) and Cd(II) in self-driven MFC–MEC system

Pan

Huang

et al. 2016

Environmental Technology

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A self-driven microbial fuel cell (MFC) - microbial electrolysis cell (MEC) system, where electricity generated from MFCs is in situ utilized for powering MECs, has been previously reported for recovering Cr(VI), Cu(II) and Cd(II) with individual metals fed in different units of the system in batch operation. Here it was advanced with treating synthetic mixed metals' solution at appropriately adjusting composites in fed-batch and continuous flow operations for complete separation of Cr(VI), Cu(II) and Cd(II) from each other. Under an optimal condition of hydraulic residence time of 4 h, matching of two serially connected MFCs with one MEC, and fed with a composite of either 5 mg L Cr(VI), 1 mg L Cu(II) and 5 mg L Cd(II), or 1 mg L Cr(VI), 5 mg L Cu(II) and 5 mg L Cd(II), the self-driven MFC-MEC system can completely and sequentially recover Cu(II), Cr(VI) and Cd(II) from mixed metals. This study provides a true sustainable and zero-energy-consumed approach of using bioelectrochemical systems for completely recovering and separating Cr(VI), Cu(II) and Cd(II) from each other or from wastes or contaminated sites.

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“…When separators or membranes are used in MFCs with oxygen reduction at the cathode, caustic can be generated at the cathode (reaction 1) . This caustic can be in‐situ or ex‐situ utilized for either removal of phosphorus as struvite from swine wastewater,or recovery of individual metals such as Cu(II), Fe(III), Zn(II), Cd(II), Co(II), and mixed W(VI) and Mo(VI) ,. However, the use of caustic has barely been examined for effective treatment of wastewaters from PrCB manufacturing with the requirement of simultaneous recovery and separation of Sn(II), Fe(II) and Cu(II) in a single process.…”

Section: Introductionmentioning

confidence: 99%

Efficient In Situ Utilization of Caustic for Sequential Recovery and Separation of Sn, Fe, and Cu in Microbial Fuel Cells

et al. 2018

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A novel strategy to sequentially recover and separate Sn(II), Fe(II) and Cu(II) from a synthetic wastewater from printed circuit board (PrCB) manufacturing in a single microbial fuel cell (MFCSn)‐MFCFe‐MFCCu process was achieved, where in‐situ produced caustic was primarily utilized for Sn precipitation (MFCSn) and then secondly used for Fe deposition (MFCFe) and anaerobic Cu(II) reduction in the final MFCCu. An external resistance of 1000 Ω in the MFCSn and MFCFe, and a 10 Ω resistor in the MFCCu achieved predominant recovery of Sn (MFCSn: 80.8±0.8 %), Fe (MFCFe: 59.1±0.8 %), and Cu (MFCCu: 68.2±1.8 %) in the three MFCs, with separation factors of 32.1±1.6 for Sn (MFCSn) and 7.5±1.8 for Fe (MFCFe), and complete recovery of Cu (MFCCu, 42‐mesh cathodes). The metal concentrations in the final effluent were below national discharge limits (Sn, 2.0 mg/L; Fe, 5.0 mg/L; Cu, 0.2 mg/L). The metal recoveries ranged from 2.6 (Sn, MFCSn)–12.0 (Cu, MFCCu), and the separation factors were 8.4 (Sn, MFCSn)–∞ (Cu, MFCCu) times those of the open circuit controls. Cathodes with 120‐mesh size of stainless steel mesh produced lower metal recoveries [33.7 % (Sn, MFCSn) and 27.0 % (Fe, MFCFe) decrease] and separation factors than MFCs with 42‐mesh cathodes. This study provides a viable approach for efficiently recovering and separating Sn, Fe and Cu from stripping solutions produced in PrCB manufacturing, with simultaneous power production.

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A new clean approach for production of cobalt dihydroxide from aqueous Co(II) using oxygen-reducing biocathode microbial fuel cells

Cited by 64 publications

References 17 publications

Microbial electrolysis cells with biocathodes and driven by microbial fuel cells for simultaneous enhanced Co(II) and Cu(II) removal

Microbial electrolysis cells with biocathodes and driven by microbial fuel cells for simultaneous enhanced Co(II) and Cu(II) removal

Continuous flow operation with appropriately adjusting composites in influent for recovery of Cr(VI), Cu(II) and Cd(II) in self-driven MFC–MEC system

Efficient In Situ Utilization of Caustic for Sequential Recovery and Separation of Sn, Fe, and Cu in Microbial Fuel Cells

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