Trace-Fe-Enhanced Capacitive Deionization of Saline Water by Boosting Electron Transfer of Electro-Adsorption Sites

Capacitive deionization (CDI) is a promising water purification technology. However, the current ion adsorption capacity of CDI electrode materials is still an issue, which cannot meet the rapid demand of clean water from saline water. Herein, trace-Fe-enhanced removal of ions from saline water via...

Full description

Saved in:
Bibliographic Details
Published in:Environmental science & technology 2020-07, Vol.54 (13), p.8411-8419
Main Authors: Wang, Guizhi, Yan, Tingting, Zhang, Jianping, Shi, Liyi, Zhang, Dengsong
Format: Article
Language:English
Subjects:
Adsorption
Deionization
Electrode materials
Electrodes
Electron transfer
Ion adsorption
Ions
Regeneration
Saline water
Sodium chloride
Treatment and Resource Recovery
Water purification
Water treatment
X ray photoelectron spectroscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Capacitive deionization (CDI) is a promising water purification technology. However, the current ion adsorption capacity of CDI electrode materials is still an issue, which cannot meet the rapid demand of clean water from saline water. Herein, trace-Fe-enhanced removal of ions from saline water via CDI is presented. The ion adsorption capacity of CDI electrodes is up to 36.25 mg g–1 in a 500 mg L–1 NaCl media at 1.2 V together with stable regeneration property. In situ Raman and ex situ XPS measurements unravel the removal mechanism of ions from saline water, and the reinforced adsorption of ions is due to the introduction of trace Fe boosting electron transfer of electro-adsorption sites during the CDI process. This work presents a promising solution to highly efficient capacitive deionization for saline water.
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.0c01518