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Title: Nanomaterials-Enhanced Electrically Switched Ion Exchange Process for Water Treatment

Abstract

The objective of our work is to develop an electrically switched ion exchange (ESIX) system based on conducting polymer/carbon nanotube (CNT) nanocomposites as a new and cost-effective approach for removal of radioactive cesium, chromate, and perchlorate from contaminated groundwater. The ESIX technology combines ion exchange and electrochemistry to provide a selective, reversible method for the removal of target species from wastewater. In this technique, an electroactive ion exchange layer is deposited on a conducting substrate, and ion uptake and elution are controlled directly by modulation of the potential of the layer. ESIX offers the advantages of highly-efficient use of electrical energy combined with no secondary waste generation. Recently, we have improved upon the ESIX process by modifying the conducting substrate with carbon nanotubes prior to the deposition of the electroactive ion exchanger. The nanomaterial-based electroactive ion exchange technology will remove cesium-137, chromate, and perchlorate rapidly from wastewater. The high porosity and high surface area of the electroactive ion exchange nanocomposites results in high loading capacity and minimize interferences for non-target species. Since the ion adsorption/desorption is controlled electrically without generating a secondary waste, this electrically active ion exchange process is a green process technology that will greatly reduce operating costs.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
951854
Report Number(s):
PNNL-SA-59140
24822; 400403209; TRN: US0902302
DOE Contract Number:
AC05-76RL01830
Resource Type:
Book
Resource Relation:
Related Information: Nanotechnology Applications for Clean Water, 179-189
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; WATER TREATMENT; ION EXCHANGE; CARBON; NANOTUBES; CESIUM 137; CHROMATES; PERCHLORATES; REMOVAL; GROUND WATER; ELECTROCHEMISTRY; ADSORPTION; DESORPTION; nanotechnology; water treatment; Environmental Molecular Sciences Laboratory

Citation Formats

Lin, Yuehe, Choi, Daiwon, Wang, Jun, and Bontha, Jagannadha R. Nanomaterials-Enhanced Electrically Switched Ion Exchange Process for Water Treatment. United States: N. p., 2009. Web.
Lin, Yuehe, Choi, Daiwon, Wang, Jun, & Bontha, Jagannadha R. Nanomaterials-Enhanced Electrically Switched Ion Exchange Process for Water Treatment. United States.
Lin, Yuehe, Choi, Daiwon, Wang, Jun, and Bontha, Jagannadha R. Thu . "Nanomaterials-Enhanced Electrically Switched Ion Exchange Process for Water Treatment". United States. doi:.
@article{osti_951854,
title = {Nanomaterials-Enhanced Electrically Switched Ion Exchange Process for Water Treatment},
author = {Lin, Yuehe and Choi, Daiwon and Wang, Jun and Bontha, Jagannadha R.},
abstractNote = {The objective of our work is to develop an electrically switched ion exchange (ESIX) system based on conducting polymer/carbon nanotube (CNT) nanocomposites as a new and cost-effective approach for removal of radioactive cesium, chromate, and perchlorate from contaminated groundwater. The ESIX technology combines ion exchange and electrochemistry to provide a selective, reversible method for the removal of target species from wastewater. In this technique, an electroactive ion exchange layer is deposited on a conducting substrate, and ion uptake and elution are controlled directly by modulation of the potential of the layer. ESIX offers the advantages of highly-efficient use of electrical energy combined with no secondary waste generation. Recently, we have improved upon the ESIX process by modifying the conducting substrate with carbon nanotubes prior to the deposition of the electroactive ion exchanger. The nanomaterial-based electroactive ion exchange technology will remove cesium-137, chromate, and perchlorate rapidly from wastewater. The high porosity and high surface area of the electroactive ion exchange nanocomposites results in high loading capacity and minimize interferences for non-target species. Since the ion adsorption/desorption is controlled electrically without generating a secondary waste, this electrically active ion exchange process is a green process technology that will greatly reduce operating costs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}

Book:
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