The Effect of Bivalent Cations in the Adsorption of Phosphonic Acids on Iron Electrodes Studied by the Radiotracer Method

1991 ◽  
Vol 46 (1-2) ◽  
pp. 183-186
Author(s):  
F. H. Kármán ◽  
E. Kálmán ◽  
L. Várallyai ◽  
J. Kónya
Keyword(s):  
Adsorption Mechanism ◽  
Iron Electrode ◽  
Diphosphonic Acid ◽  
Phosphonic Acids ◽  
Radiotracer Method ◽  
Iron Electrodes ◽  
Bivalent Cations ◽  
Neutral Aqueous Solution ◽  
Zinc Cations

AbstractThe adsorption of 1-hydroxyethylidene-1,1 -diphosphonic acid (HEDP) on an iron electrode in neutral aqueous solution has been examined by the radiotracer method. The role of calcium and zinc cations in the adsorption mechanism has also been studied in order to understand the synergistic effect when HEDP is applied together with these cations

scholarly journals Arsenic Removal by Advanced Electrocoagulation Processes: The Role of Oxidants Generated and Kinetic Modeling

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 928
Author(s):  
Micah Flor V. Montefalcon ◽  
Meliton R. Chiong ◽  
Augustus C. Resurreccion ◽  
Sergi Garcia-Segura ◽  
Joey D. Ocon
Keyword(s):  
Kinetic Modeling ◽  
Arsenic Removal ◽  
Fold Increase ◽  
Electrochemical Treatment ◽  
Promising Alternative ◽  
Iron Electrodes ◽  
Removal Capacity ◽  
Naturally Occurring ◽  
Treatment Technologies

Arsenic (As) is a naturally occurring element in the environment that poses significant risks to human health. Several treatment technologies have been successfully used in the treatment of As-contaminated waters. However, limited literature has explored advanced electrocoagulation (EC) processes for As removal. The present study evaluates the As removal performance of electrocoagulation, electrochemical peroxidation (ECP), and photo-assisted electrochemical peroxidation (PECP) technologies at circumneutral pH using electroactive iron electrodes. The influence of As speciation and the role of oxidants in As removal were investigated. We have identified the ECP process to be a promising alternative for the conventional EC with around 4-fold increase in arsenic removal capacity at a competitive cost of 0.0060 $/m3. Results also indicated that the rate of As(III) oxidation at the outset of electrochemical treatment dictates the extent of As removal. Both ECP and PECP processes reached greater than 96% As(III) conversion at 1 C/L and achieved 86% and 96% As removal at 5 C/L, respectively. Finally, the mechanism of As(III) oxidation was evaluated, and results showed that Fe(IV) is the intermediate oxidant generated in advanced EC processes, and the contribution of •OH brought by UV irradiation is insignificant.

Competitive adsorption mechanism of thiophene with benzene in FAU zeolite: The role of displacement

2017 ◽  
Vol 328 ◽  
pp. 172-185 ◽  
Author(s):  
Shanqing Dang ◽  
Liang Zhao ◽  
Qing Yang ◽  
Meng Zheng ◽  
Jingjing Zhang ◽  
...  
Keyword(s):  
Adsorption Mechanism ◽  
Competitive Adsorption ◽  
Fau Zeolite

Dual Role of Citric Acid as a Binding Inhibitor of Anionic Surfactant with Bivalent Cations and Co-Surfactant on Bio-Surfactant EOR

2018 ◽  
Author(s):  
Nao Miyazaki ◽  
Yuichi Sugai ◽  
Kyuro Sasaki ◽  
Yoshifumi Okamoto ◽  
Chencan Ouyang
Keyword(s):  
Citric Acid ◽  
Anionic Surfactant ◽  
Dual Role ◽  
Bivalent Cations

The role of bivalent cations in quartz flotation

1965 ◽  
Vol 1 (5) ◽  
pp. 540-543
Author(s):  
I. N. Plakis ◽  
N. I. Eliseev ◽  
F. I. Nagirnyak
Keyword(s):  
Bivalent Cations

scholarly journals Role of preferential weak hybridization between the surface-state of a metal and the oxygen atom in the chemical adsorption mechanism

2013 ◽  
Vol 15 (43) ◽  
pp. 19019 ◽  
Author(s):  
Yong Su Kim ◽  
Sang Ho Jeon ◽  
Aaron Bostwick ◽  
Eli Rotenberg ◽  
Philip N. Ross ◽  
...  
Keyword(s):  
Oxygen Atom ◽  
Surface State ◽  
Adsorption Mechanism ◽  
Chemical Adsorption

ChemInform Abstract: Role of Sulfide Additives on the Performance of Alkaline Iron Electrodes.

ChemInform ◽  
1990 ◽  
Vol 21 (50) ◽  
Author(s):  
K. VIJAYAMOHANAN ◽  
A. K. SHUKLA ◽  
S. SATHYANARAYANA
Keyword(s):  
Iron Electrodes
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