Abstract
Capacitive deionization (CDI) with water disinfection materials is a potential method to produce fresh water from aqueous solutions. Therefore, an ordered mesoporous carbon with chitosan (OMC-CS) was coated on the active carbon (AC) electrode as a capacitive deionization disinfection (CDI) electrode. Comparing with OMC-CS-4,6,8 as CDI electrodes, it was found that OMC-CS-6 as a CDI electrode had an excellent disinfection efficiency, killing about 99.99% Escherichia coli (E. coli) in the CDI process at an applied 1.2 V. The OMC-CS material was did not pollute the water and will not contaminate to the environment in comparison with other chemical antibacterial agents. This CDI electrode could play a huge role in biocontaminated water in the future.
Highlights
According to the 2015 Global Risk Report, which was published by the World Economic Forum (WEF), the water crisis is ranked as the top long-term risk [1]
CMK-3 and ordered mesoporous carbon with chitosan (OMC-CS)-4,6,8 were ordered as am arrangement of cylindrical mesoporous channels
In the first 60 seconds of the experiment, the conductivity of NaCl solution by using CMK-3 electrode was reduced from 169.5 to 165.7 μS/cm. This reduction was significantly higher than OMC-CS-4,6,8 electrodes, which was due to the adsorption of ions was affected by the channels and surfaces of CMK-3 were loaded by chitosan
Summary
According to the 2015 Global Risk Report, which was published by the World Economic Forum (WEF), the water crisis is ranked as the top long-term risk [1]. Capacitive deionization (CDI) technology has attracted much attention due to its use of nontoxic chemicals with no contaminants, as well as being easy to operate and economical, compared with competitive technologies, including reverse osmosis (RO) [5,20] and multistage flash distillation (MSF) [21], multi-effect distillation (MED) [22] and thermal processes [23]. It is becoming a potential technology for removing the salts in producing fresh water from saline water flowing through two opposing electrodes [24,25]. The ordered mesoporous carbon with chitosan (OMC-CS) was coated on the activated carbon electrode as a CDI electrode for the capacitive deionization disinfection of saline water
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