Final Supporting Information€¦ · 2Nanosystems Engineering Research Center for...
Transcript of Final Supporting Information€¦ · 2Nanosystems Engineering Research Center for...
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[Supporting Information]
For the manuscript: REMOVAL OF CALCIUM IONS FROM WATER BY SELECTIVE
ELECTROSORPTION USING TARGET-ION SPECIFIC NANOCOMPOSITE ELECTRODE
Jun Kim1,2, Amit Jain2,3, Kuichang Zuo1,2, Rafael Verduzco2,3, Shane Walker2,4, Menachem
Elimelech2,5, Zhenghua Zhang6, Xihui Zhang6, and Qilin Li1,2,3,*
1Department of Civil and Environmental Engineering, Rice University
6100 Main Street MS 519, Houston, TX 77005, USA
2Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment
6100 Main Street MS 6398, Houston, TX 77005, USA
3Department of Chemical and Biomolecular Engineering, Rice University
6100 Main Street MS 362, Houston, TX 77005, USA
4Department of Civil Engineering, The University of Texas at El Paso
El Paso, TX 79968, U.S.A.
5Department of Chemical and Environmental Engineering, Yale University
New Haven, CT 06520, U.S.A.
6Graduate School of Shenzhen, Tsinghua University
Tsinghua Campus, The University Town, Shenzhen 518055, P. R. China
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Corresponding Author
*Prof. Qilin Li [email protected]
Department of Civil and Environmental Engineering, Rice University, 6100 Main Street MS
519, Houston, TX 77005, USA.
Mean particle size (nm) 142.5
Standard deviation 44.2
Figure S1. Size distribution of cryo-ground ion-exchange resin particles.
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Figure S2. Performance of uncoated and CSN electrodes using 10 meq/L NaCl solution. (a) Conductivity and current profiles of the two electrodes; (b) conductivity profile during adsorption stage; (c) conductivity profile during desorption stage.
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Figure S3 Current and voltage profile of uncoated and CSN coated electrode using 10 meq/L CaCl2 feed solution.
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Figure S4. Adsorption kinetics of total cation, Ca2+, and Na+ by the CSN electrode at different feed meq ratio. (a) 1:1, (b) 2:1, (c) 5:1, and (d) 10:1. Displaced amount of Na+ (∆𝑞#$) is indicated.
Figure S5. Terminal concentration difference between influent and effluent, at each influent eq ratio.
0.0500.101
0.159
0.259
-0.007 -0.013 -0.015 -0.005
-0.2
0.0
0.2
0.4
Influent Na+:Ca2+ eq ratio
Ca Na
1 -C
eff/C
0 in
1:1 2:1 5:1 10:1
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Figure S6. Ion-transport rate of Ca2+ and Na+ across the CSN layer. (a) Electrodialysis (ED) cell, (b) the CSN layer, (c) schematic diagram of ED cell, (d) average concentration (normalized) of acceptor and donor chamber.