Open Access
Electrosorption/Electrodesorption of Arsenic on a Granular Activated Carbon in the Presence of Other Heavy Metals
TLDR
It is shown that the application of anodic potentials in the 1.0 - 1.5V range, however, result in enhanced uptake, most probably due to charging of the electrochemical double-layer at the electrode surface.Abstract:
The adsorption, electrosorption, and electrodesorption of aqueous, inorganic arsenic on the granular activated carbon (GAC), DARCO 12 × 20 (Darco 1220) GAC, were investigated in solutions containing arsenic as the only contaminant, as well as with chromium, nickel, and iron. Darco 1220 was selected for these investigations primarily because it is relatively ineffective as a normal (unassisted) arsenic adsorbent in the chosen electrolytes at the low loadings used. It is shown that the application of anodic potentials in the 1.0−1.5 V range, however, result in enhanced uptake, most likely because of charging of the electrochemical double layer at the electrode surface. Regeneration (100%) of electrosorbed arsenic was achieved via electrodesorption at a cathodic potential of 1.50 V. The presence of metal ad ions was observed to have a significant and complex effect on arsenic adsorption, electrosorption, and electrodesorption. In particular, the Cr/As ratio was shown to have complex effects, decreasing adsor...read more
Citations
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References
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Book
Atlas of Electrochemical Equilibria in Aqueous Solutions
TL;DR: The Atlas of Electrochemical Equilibria in Aqueous solutions as discussed by the authors is the most complete and complete work on aqueous solvents, which includes a detailed description of the properties of the solvers.
Book ChapterDOI
Arsenic in the environment
TL;DR: In this article, the use of analytical methods allowing much more detailed study of the environmental chemistry of arsenic is described and use of these methods in delineating the presence of methyl arsenic in the environment is discussed.
Book
Environmental Modeling: Fate and Transport of Pollutants in Water, Air, and Soil
TL;DR: A comprehensive, thoroughly modern approach to environmental quality assessment, Environmental Modeling brings a uniquely contemporary perspective to the assessment of environmental quality as mentioned in this paper, addressing key questions about fate, transport, and long-term effects of chemical pollutants in the environment, giving readers the important tools they need to develop and solve their own mathematical models.
Journal ArticleDOI
Charge-transfer materials for electrochemical water desalination, ion separation and the recovery of elements
Pattarachai Srimuk,Pattarachai Srimuk,Xiao Su,Jeyong Yoon,Doron Aurbach,Volker Presser,Volker Presser +6 more
TL;DR: In this paper, the authors assess electrochemical-desalination mechanisms and materials, including ion electrosorption and charge transfer processes, and discuss performance metrics and cell architectures, which decouple from the nature of the electrode material and the underlying mechanism to show the versatility of cell design concepts.