期刊
SOLID STATE IONICS
卷 314, 期 -, 页码 141-148出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2017.11.004
关键词
Microbial desalination cells; Anion exchange membranes; Desalination; Power electricity generation; Transport phenomena
资金
- Bill & Melinda Gates Foundation grant: Efficient Microbial Bio-electrochemical Systems [OPP1139954]
- National Science Foundation Award CAREER [1652619]
- National Science Foundation Award EPSCoR [IIA-1301346]
- National Science Foundation [1703307]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1652619, 1703307] Funding Source: National Science Foundation
- Division Of Human Resource Development
- Direct For Education and Human Resources [1345169] Funding Source: National Science Foundation
- Office of Integrative Activities
- Office Of The Director [1301346] Funding Source: National Science Foundation
Quaternary ammonium poly(2,6-dimethyl 1,4-phenylene oxide) (QAPPO) anion exchange membranes (AEMs) with topographically patterned surfaces were assessed in a microbial desalination cell (MDC) system. The MDC results with these QAPPO AEMs were benchmarked against a commercially available AEM. The MDC with the non-patterned QAPPO AEM (Q1) displayed the best desalination rate (a reduction of salinity by 53 +/- 2.7%) and power generation (189 +/- 5 mW m(-2)) when compared against the commercially available AEM and the patterned AEMs. The enhanced performance with the Q1 AEM was attributed to its higher ionic conductivity and smaller thickness leading to a reduced area specific resistance. It is important to note that Real Pacific Ocean seawater and activated sludge were used into the desalination chamber and anode chamber respectively for the MDC - which mimicked realistic conditions. Although the non-patterned QAPPO AEM displayed better performance over the patterned QAPPO AEMs, it was observed that the anodic overpotential was smaller when the MDCs featured QAPPO AEMs with larger lateral feature sizes. The results from this study have important implications for the continuous improvements necessary for developing cheaper and better performing membranes in order to optimize the MDC.
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