Journal
DESALINATION
Volume 451, Issue -, Pages 241-247Publisher
ELSEVIER
DOI: 10.1016/j.desal.2018.02.006
Keywords
-
Categories
Funding
- National Research Foundation of Singapore, Prime Minister's Office under its Environment & Water Research Programme [1301-IRIS-17]
Ask authors/readers for more resources
Novel desalination technologies with high ion removal capacity and low energy consumption are urgently needed to solve the water scarcity problem. Here we report a novel energy efficient dual-ions electrochemical deionization (DEDI) system with Ag nanoparticles/reduced graphene-oxide (AgNPs/rGO) as chloride ion Faradaic electrode and NaTi2(PO4)(3)/reduced graphene-oxide (NTP/rGO) as sodium ion Faradaic electrode. During the intercalation process, the sodium ions and chloride ions in the feed solution will be chemically intercalated into NTP/rGO electrode and AgNPs/rGO electrode, respectively. The DEDI system shows a stable and reversible salt removal capacity of 105 mg g(-1) for 50 cycles with applied voltage range of- 1.2-1.4 V. More importantly, when applying from 0 V to 1.4 V, although the removal capacity is relatively low (35.8 mg g(-1)), the energy recovery of this system is higher than 30% and the energy consumption is as low as 0.127 Wh g(-1.) Considering the brackish water used here is 2500 ppm, the energy consumption can be estimated to be 0.254 Wh L-1 for desalination of brackish water to drinkable water (500 ppm). The excellent performance of this DEDI system has made it a promising commercial technology for desalination of brackish water even seawater in the future.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available