MESSAI.iO
Microbial desalination cellRepresentative model
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Representative microbial desalination cell — matched on the paper’s system type only, not its reactor or geometry.

Extraction

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What they did

System
MDC

What worked

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Abstract

Microbial desalination cells (MDCs) provide a sustainable approach to desalinate saltwater powered by bacterial metabolism during organic oxidation. A systematic study was conducted to clarify the ion-dominated interactions for preventing unpredictable risks for long-term MDC operations in the treatment of complex ion-containing wastewaters. The investigation showed that the migration and unequal scaling of cations at different ion exchange membrane (IEM) surfaces greatly influenced their transmembrane processes, which were directly affected by the hydrolysis and precipitation behavior controlled by the solubility product and ambient solution, resulting in the following removal efficiency of MDCs: Na+ > Ca2+ > Cu2+ > Al3+ > Fe3+. A further study showed that the precipitation antagonism and pH buffer effect of multiple cations could positively promote the desalination of sparingly soluble cations. Eventually, the desalination efficiency of MDC in the treatment of actual industrial tailwater was maintained at 63.2–74.1 %. These findings not only elucidated the kinetics of ion migration in detail but also offered new application possibilities for MDCs.

Keywords

DesalinationWastewaterIndustrial wastewater treatmentEnvironmental chemistryEnvironmental engineeringPulp and paper industry

Identifiers

DOI
10.5796/electrochemistry.23-00018
Journal
Electrochemistry
Year
2023