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Title: Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes
Authors: Huang, Yinxi
Chen, Fuming
Guo, Lu
Zhang, Jun
Chen, Tupei
Yang, Hui Ying
Keywords: Engineering::Environmental engineering
Issue Date: 2019
Source: Huang, Y., Chen, F., Guo, L., Zhang, J., Chen, T. & Yang, H. Y. (2019). Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes. Desalination, 451, 241-247.
Project: 1301-IRIS-17
Journal: Desalination
Abstract: 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.
ISSN: 0011-9164
DOI: 10.1016/j.desal.2018.02.006
Rights: © 2018 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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