Dependency of migration and reduction of mixed Cr2O72−, Cu2+ and Cd2+ on electric field, ion exchange membrane and metal concentration in microbial fuel cells

Qian, Yitong; Huang, Liping; Pan, Yuzhen; Quan, Xie; Lian, Huan; Yang, Jinhui

doi:10.1016/j.seppur.2017.09.049

Cited by 30 publications

(4 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, the use of non‐ion selective separators can minimize pH imbalances, but then all chemicals could cross between the chambers . As a compromise, and considering the acidic mixed anion metals, and durability and cost of ion exchange membrane,, an AEM (Ultrex AMI‐7001, Membranes International, Glen Rock, NJ) rather than CEM was used here to separate the two chambers of each MFC unit. Porous graphite felt (1.0×1.0×1.0 cm, Sanye Co., Beijing, China) was used for the anodes of all MFC units.…”

Section: Methodsmentioning

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Methodsmentioning

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…Each microbial photoelectrochemical reactor was made from two cubic polymethyl methacrylate blocks containing hollow cylindrical anodic and cathodic chambers (diameter 3 cm, volume 28 mL, working volume 26 mL). The dual chambers were ionically connected by a cation exchange membrane (CMI-7000 Membranes International, Glen Rock, NJ) which sufficiently prevented Cr2O7 2and product CH3COOanions migration [13][14][15][16]. The reactors comprised WO3/MoO3/g-C3N4 graphite felt cathodes and carbon rods anodes.…”

Section: Microbial Photoelectrochemical Reactor Electrotroph Inoculation and Operationmentioning

confidence: 99%

Efficient conversion of bicarbonate (HCO3−) to acetate and simultaneous heavy metal Cr(VI) removal in photo-assisted microbial electrosynthesis systems combining WO3/MoO3/g-C3N4 heterojunctions and Serratia marcescens electrotroph

Huang

Song

Cai

et al. 2021

Chemical Engineering Journal

Self Cite

View full text Add to dashboard Cite

The removal of the hazardous heavy metal Cr(VI) in water and the simultaneous production of acetate from the reduction of inorganic carbon (HCO3 -) is demonstrated in a photo-assisted microbial electrosynthesis (MES) system incorporating WO3/MoO3/g-C3N4 Z-scheme heterojunctions and Serratia marcescens Q1 electrotroph cathode. The rates of acetate production (6.1 ± 0.3 mg/L/h) and Cr(VI) removal (4.5 ± 0.1 mg/L/h) recorded at a circuital current of 2.8 ± 0.1 A/m 2 were 2.4-fold (acetate production), 1.7-time (Cr(VI) removal) and 1.6-fold (circuital current) of those in the controls recorded in the absence of WO3/MoO3/g-C3N4, and 1.6-fold (acetate production) and 1.8-time (circuital current) of those in the absence of both Cr(VI) and WO3/MoO3/g-C3N4. Photogenerated WO3/MoO3/g-C3N4 conduction bands electrons favored both direct or indirect (via S. marcescens) reductions of Cr(VI) and H + , with the latter producing H2 which was further metabolized by S. marcescens with HCO3to yield acetate. The higher circuital current drawn under photoirradiation conditions refilled the photo-generated valence band holes in the semiconductor and provided the driving force for the reduction reactions. This study provides an alternative and feasible approach for achieving complete removal of toxic heavy metal from water and industrial waters with simultaneous conversion of inorganic carbon to key block chemicals.

show abstract

“…Additional protection of these coatings is provided by the special protective membranes (Qian et al 2018, Bolshanina 2016a. The membranes are the thin conversion nanofilms designed to protect the electroplated coatings from corrosion.…”

Section: Journal Of Ecological Engineeringmentioning

confidence: 99%

Prevention of Hydrosphere Contamination with Electroplating Solutions through Electromembrane Processes of Regeneration

Serdiuk¹,

Sklabinskyi²,

Bolshanina³

et al. 2020

J. Ecol. Eng.

View full text Add to dashboard Cite

The work studies the process of Сd 2+ and Zn 2+ cations transfer through a RALEX®CM-PES 11-66 cation-exchange membrane and the cations reduction as metals on the cathodes at the cathode chambers of the electrochemical units with a view to prevent the hydrosphere contamination with the electroplating solutions. Electrolysis of the solutions that imitated the possible composition of the passivating baths contained 50 g/l sodium dichromate, 10 g/l sulfuric acid and impurity ions of Сd 2+ and Zn 2+ in various concentrations. The designed passivation solutions with certain amount of impurity ions in the colour solution were forcibly mixed. The impact of the impurity ions concentration in the colour solution and of a forced mixing on the metal reduction was studied. Regularity in the increased metal reduction dependent on the metal concentration was found and the conditions favouring the ion migration through the cation-exchange membrane due to forced mixing were defined.

show abstract

Dependency of migration and reduction of mixed Cr2O72−, Cu2+ and Cd2+ on electric field, ion exchange membrane and metal concentration in microbial fuel cells

Cited by 30 publications

References 62 publications

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

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

Efficient conversion of bicarbonate (HCO3−) to acetate and simultaneous heavy metal Cr(VI) removal in photo-assisted microbial electrosynthesis systems combining WO3/MoO3/g-C3N4 heterojunctions and Serratia marcescens electrotroph

Prevention of Hydrosphere Contamination with Electroplating Solutions through Electromembrane Processes of Regeneration

Contact Info

Product

Resources

About