Bioelectrochemical remediation of Cr(VI)/Cd(II)-contaminated soil in bipolar membrane microbial fuel cells

Wang, Heming; Zhang, Huihui; Zhang, Xiaofei; Li, Qiang; Cheng, Changkun; Shen, Hui; Zhang, Zhongzhi

doi:10.1016/j.envres.2020.109582

Cited by 45 publications

(7 citation statements)

References 39 publications

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“…In addition, multi-heavy metal ions still would be migrated or reduced since the electric field generated by soil MFC had no selectivity for the driving of charged ions ( Zhang et al, 2022 ). Wang et al (2020b) found that the interaction between negatively charged chromium and positively charged lead in the soil had no major effect on hindering migration. Moreover, the remediation performance of composite heavy metal contaminated soil was better than that of single heavy metal contaminated soil.…”

Section: Optimizing Soil Mfc Operation and Configuration For Heavy Me...mentioning

confidence: 94%

Advance in remediated of heavy metals by soil microbial fuel cells: Mechanism and application

Sun

Wang²,

Long³

et al. 2022

Front. Microbiol.

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In the past decade, studies on the remediation of heavy metals contaminated soil by microbial fuel cells (MFCs) have attracted broad attention because of the self-generated power and their multifield principles such as the extracellular electron transfer (EET) reduction, electromigration for heavy metals removal. However, given the bio electro-motive power from soil MFCs is weak and fluctuated during the remediation, we need to comprehensively understand the origination of driving force in MFC based on the analysis of the fundamental rationale of ion moving in cells and improve the performance via the appropriate configurations and operations. In this review, we first described the structures of soil MFCs for heavy metals remediation and compared the advantages of different types of configurations. Then, based on the theoretical models of heavy metal migration, enrichment, and reduction in soil MFCs, the optimization of soil MFCs including the length of the remediation area, soil conductivity, control of electrode reaction, and modification of electrodes were proposed. Accordingly, this review contributes to the application of bioelectrochemistry to efficiently remove heavy metals from soils.

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Section: Optimizing Soil Mfc Operation and Configuration For Heavy Me...mentioning

confidence: 94%

Advance in remediated of heavy metals by soil microbial fuel cells: Mechanism and application

Sun

Wang²,

Long³

et al. 2022

Front. Microbiol.

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“…In order to analyze the changes of Cr content in soil, potassium chromate was added to the natural clean soil to simulate contaminated soil [20,21]. First, the collected soil (from Huyi District of Xi'an city, China) was screened to remove impurities such as gravels, plant rhizomes, and leaves, and then the soil was naturally dried and crushed.…”

Section: Methodsmentioning

confidence: 99%

Immobilization of high concentration hexavalent chromium via core-shell structured lightweight aggregate: A promising soil remediation strategy

Yang

Zheng

et al. 2020

Chemical Engineering Journal

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Among industrially polluted soils, chromium contaminated sites, especially hexavalent chromium contaminated (Cr 6+ ) sites, are particularly difficult to manage. The Cr 6+ in such soils is usually at a high concentration. Several studies show that sintering and solidification are effective ways to treat Cr 6+ in soil. In this study, a coreshell lightweight aggregate (CS-LWA) was prepared using Cr 6+ contaminated soil as the core and clean bulk materials as a shell to seal the Cr 6+ pollutant in the core, and the shell prevents it from leaching out. A reductant, pulverized coal, was added to assist the solidification and reduce chromium toxicity. The results show that this method can effectively reduce the leaching of chromium in polluted soil with varying chromium content, and that chromium leaching can be further reduced by increasing the amount of coating material. The chromium in leachate from coated CS-LWA mixed with 8% pulverized coal was only 0.02 mg/L, much lower than 1042.8 mg/L in leachate from untreated chromium-contaminated soil. Moreover, the strength, density, and water absorption characteristics of CS-LWA met the Chinese national standards, enabling its use as a lightweight aggregate for construction.

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“…Ammonia and phosphate have been recovered from biological waste using BPMED, − producing phosphoric acid and ammonium hydroxide with high recovery rates (>80%). Hypophosphorous acid, useful for electroless nickel plating, can be extracted from waste plating solutions with high efficiency and economically feasible process costs. , The regeneration of flue-gas desulfurizing agents (alkanolamines) can be conducted using BPMED at process costs competitive with the market value of alkanolamines. − Toxic metal wastes such as chromium and cadmium can be extracted from wastewater and soil, − while textile dyes can be removed from solution via the in situ generation of a dye absorbent, Ni(OH) x , at the BPM interface, with minimal membrane scaling . Overall, the use of BPMED for waste valorization or removal is versatile, where the number of applications will increase as interest in developing “green”, sustainable chemical processes grows.…”

Section: Applicationsmentioning

confidence: 99%

Recent Advances in Bipolar Membrane Design and Applications

2020

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Integration of bipolar membranes (BPMs) into electrochemical cells is an established method for acid and base generation, as well as desalinization methods. More recently, BPMs have been recognized for their ability to control the environment of half-reactions, including the maintenance of a pH gradient, without significant loss in efficiency. Over the past few years, significant advances have been made in BPM design, resulting in rapid deployment of BPMs into a wide range of applications, from mineral extraction, to energy storage and conversion frameworks, to ionotronics. Here, we explore the fundamentals of BPM operation and recent methods that have improved the performance and stability of BPMs and provide an overview of the limitations inherent to current BPM-based technologies, with a focus on future directions. Finally, we highlight research areas where BPM integration has enhanced, or is essential for, device operation, showing the versatility, potential, and broad range of research areas impacted by BPMs.

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Bioelectrochemical remediation of Cr(VI)/Cd(II)-contaminated soil in bipolar membrane microbial fuel cells

Cited by 45 publications

References 39 publications

Advance in remediated of heavy metals by soil microbial fuel cells: Mechanism and application

Advance in remediated of heavy metals by soil microbial fuel cells: Mechanism and application

Immobilization of high concentration hexavalent chromium via core-shell structured lightweight aggregate: A promising soil remediation strategy

Recent Advances in Bipolar Membrane Design and Applications

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