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Indexed by:期刊论文

Date of Publication:2018-12-01

Journal:ACS SUSTAINABLE CHEMISTRY & ENGINEERING

Included Journals:SCIE、Scopus

Volume:6

Issue:12

Page Number:17204-17210

ISSN No.:2168-0485

Key Words:Quaternary ammonium compound; Activated carbon; Capacitive deionization; Water disinfection; Contact-active

Abstract:New water disinfection technologies should be developed because current methods usually produce disinfection by-products and are expensive. Here, we demonstrated the use of a contact-active activated carbon electrode functionalized by quaternary ammonium compound for capacitive deionization disinfection (CDID) at a contaminant concentration of 104 CFU/mL. The effects of cell voltage, flow rate, and ion concentration on the disinfection performance of CDID electrode were investigated. The electrode can kill 99% of Escherichia coli or Pseudomonas aeruginosa (with a concentration of 104 CFU/mL) at a relatively low cell voltage (1.2 V) and a relatively high flow rate (5 mL/min). The damage on cell membranes was proved to be the killing mechanism. Furthermore, the CDID system exhibited high cyclic stability and its kill rate was maintained approximately 90% after five regeneration cycles. Thus, CDID electrode presented in this work has promising application prospect in water disinfection.