Microbial desalination cells packed with ion-exchange resin to enhance water desalination rate.
A novel configuration of microbial desalination cell (MDC) packed with ion-exchange resin (R-MDC) was proposed to enhance water desalination rate. Compared with classic MDC (C-MDC), an obvious increase in desalination rate (DR) was obtained by R-MDC. With relatively low concentration (10-2 g/L NaCl) influents, the DR values of R-MDC were about 1.5-8 times those of C-MDC. Ion-exchange resins packed in the desalination chamber worked as conductor and thus counteracted the increase in ohmic resistance during treatment of low concentration salt water. Ohmic resistances of R-MDC stabilized at 3.0-4.7 Ω. By contrast, the ohmic resistances of C-MDC ranged from 5.5 to 12.7 Ω, which were 55-272% higher than those of R-MDC. Remarkable improvement in desalination rate helped improve charge efficiency for desalination in R-MDC. The results first showed the potential of R-MDC in the desalination of water with low salinity.
State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment, Tsinghua University, Beijing 100084, PR China.
Alexandre
A
Morel
Kuichang
K
Zuo
Xue
X
Xia
Jincheng
J
Wei
Xi
X
Luo
Peng
P
Liang
Xia
X
Huang
D001674:Bioelectric Energy Sources / Q000382:microbiology; D017097:Electric Impedance; D007475:Ion Exchange Resins / Q000737:chemistry*; D007700:Kinetics; D012212:Rheology; D054712:Salinity; D012965:Sodium Chloride / Q000302:isolation & purification*; D014867:Water / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
D007475:Ion Exchange Resins; D014867:Water; D012965:Sodium Chloride