Electrically Switched Ion Exchange Based on Carbon-Polypyrrole Composite Smart Materials for the Removal of ReO ₄ ^– from Aqueous Solutions

Journal Article · Wed Jan 23 04:00:00 EST 2019 · Environmental Science and Technology

DOI:https://doi.org/10.1021/acs.est.8b04789· OSTI ID:1507132

Guo, Zizhang ^[1]; Shams, Mehnaz ^[2]; Zhu, Chengzhou ^[3]; Shi, Qiurong ^[3]; Tian, Yuhao ^[2]; Engelhard, Mark H. ^[4]; Du, Dan ^[3]; Chowdhury, Indranil ^[2]; Lin, Yuehe ^[3]

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1. School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164-2920, United States; School of Environmental Science and Engineering, Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong University, Jinan 250100, China
2. Department of Civil and Environmental Engineering, Washington State University, Pullman, Washington 99164, United States
3. School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164-2920, United States
4. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States

A simple and rapid process of TcO4- (or ReO4-) separation from aqueous solutions based on electrically switched ion exchange (ESIX) method was presented in this study. Polypyrrole (PPy) functionalized activated carbon (AC) was served as an excellent electrically switched ion exchanger for ions removal. Physico- and electro-chemical characteristics show AC-PPy composite exhibited an excellent capacity for ReO4 - removal and high stability during 50 times potential cycling. Chronoamperometric studies show that the treatment of ESIX could be completed within 60 s, which sharply shorten the time of uptake and release of ions. X-ray photoelectron spectroscopy (XPS) confirmed the process of ReO4- removal in AC-PPy composite. The present work provides a promising method for radioactive anion removal in water treatment.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1507132
• Report Number(s): PNNL-SA-131524
• Journal Information: Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 5 Vol. 53; ISSN 0013-936X
• Publisher: American Chemical Society (ACS)
• Country of Publication: United States
• Language: English

Related Subjects

electrically switched ion exchange
activated carbon
polypyrrole
perrhenate removal