Browse by author
Lookup NU author(s): Dr Lucia Rodriguez Freire
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
Self-designed electrokinetic setups were constructed to examine the differences in electromigration and electroosmotic rates in both sand and clay. Two dyes were analyzed separately to measure these phenomena within these two media types. The dyes used were a red food coloring (primary compound Allura Red) and a green food coloring (referred to as a “blue dye,” as its migrating component was C-phycocyanin (C-PC) via Spirulina Blue extract). The power supply had a 30 V output with a measured 9.36 ± 0.04 mA current (0.054 mA/cm2) output. Electromigration was readily apparent for the red dye in both sand (9.12 ± 1.57 cm/d) and clay (0.93 ± 0.16) cm/d. It was also observed for the blue dye (C-PC) in sand (7.28 ± 0.57 cm/d) but not in clay. A confirmation experiment for the blue dye in sand was performed at an identical voltage but a slightly lower current output (0.040 mA/cm2), and the migration rate was found to be similar, at 6.60 ± 0.20 cm/d. For the blue dye in clay, the migration rate proceeded toward the cathode at 0.17 cm/d. Calculations indicate this phenomenon to be due to electroosmosis but may be due to a weak electromigration of the dye in protonated form.
Author(s): Wartell BA, Boufadel MC, Rodriguez-Freire L, Axe L, Abrams S, Ciblak A
Publication type: Article
Publication status: Published
Journal: Journal of Hazardous, Toxic, and Radioactive Waste
Year: 2020
Volume: 25
Issue: 2
Online publication date: 23/11/2020
Acceptance date: 20/08/2020
ISSN (print): 2153-5493
ISSN (electronic): 2153-5515
Publisher: American Society of Civil Engineers
URL: https://doi.org/10.1061/(ASCE)HZ.2153-5515.0000576
DOI: 10.1061/(ASCE)HZ.2153-5515.0000576
Altmetrics provided by Altmetric
