Journal article
Electrically Switched Ion Exchange Based on Carbon-Polypyrrole Composite Smart Materials for the Removal of ReO4- from Aqueous Solutions
Environmental science & technology, Vol.53(5), pp.2612-2617
03/05/2019
PMID: 30672699
Abstract
A simple and rapid process of ReO4- (as a surrogate of TcO4-) removal from aqueous solutions based on the electrically switched ion exchange (ESIX) method has been demonstrated in this work. Activated carbon-Polypyrrole (AC-PPy) was synthesized from activated carbon and pyrrole by electrodeposition method which was served as an electrically switched ion exchanger for ReO4- removal. The characterization results show that the AC-PPy composite exhibited an excellent loading capacity and a high stability for ions uptake and release. Chronoamperometric studies show that the ESIX treatment could be completed within 60 s, demonstrating the rapid uptake and release of ions. Uptake and release of Re04 was verified by electrochemical quartz crystal microbalance with dissipation shift (EQCMD) studies. By modulating the electrochemical potential of the AC-PPy, the uptake and release of ReO4- ions can be controlled. Similar trends of uptake and release of Re04were observed in cyclic voltammetry (-0.4 to 0.8 V) for five cycles with the EQCMD. X-ray photoelectron spectroscopy (XPS) confirmed the process of ReO4- removal in the AC-PPy composite. Conclusively, the smart material shows excellent efficiency and selectivity for the removal of ReO4- from aqueous solutions.
Metrics
1 Record Views
Details
- Title
- Electrically Switched Ion Exchange Based on Carbon-Polypyrrole Composite Smart Materials for the Removal of ReO4- from Aqueous Solutions
- Creators
- Zizhang Guo - Washington State UniversityMehnaz Shams - Washington State UniversityChengzhou Zhu - Washington State UniversityQurong Shi - Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USAYuhao Tian - Washington State UniversityMark H. Engelhard - Pacific Northwest National LaboratoryDan Du - Washington State UniversityIndranil Chowdhury - Washington State UniversityYuehe Lin - Washington State University
- Publication Details
- Environmental science & technology, Vol.53(5), pp.2612-2617
- Academic Unit
- School of Mechanical and Materials Engineering
- Publisher
- Amer Chemical Soc
- Number of pages
- 6
- Grant note
- Department of Energy's Office of Biological and Environmental Research located at Pacific Northwest National Laboratory 2016WA411B / US Geological Survey grant via State of Washington Water Research Center 201606220157 / China Scholarship Council
- Identifiers
- 99901227848001842
- Language
- English
- Resource Type
- Journal article