Electrochemical treatment of poly- and perfluoroalkyl substances in brines

2020 ◽  
Vol 6 (10) ◽  
pp. 2704-2712
Author(s):  
Charles E. Schaefer ◽  
Danielle Tran ◽  
Yida Fang ◽  
Youn Jeong Choi ◽  
Christopher P. Higgins ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Anodic Oxidation ◽  
Electrochemical Treatment ◽  
Perfluoroalkyl Substances ◽  
Indirect Oxidation ◽  
Bench Scale ◽  
Film Forming

Bench-scale experiments were performed to evaluate the electrochemical oxidation, via direct anodic oxidation and indirect oxidation from salt-derived species, of diluted aqueous film forming foam (AFFF) in brine solutions.

Assessing Continued Electrochemical Treatment of Groundwater Impacted by Aqueous Film-Forming Foams

2019 ◽  
Vol 145 (12) ◽  
pp. 06019007 ◽  
Author(s):  
Charles E. Schaefer ◽  
Christina Andaya ◽  
Andrew Maizel ◽  
Christopher P. Higgins
Keyword(s):  
Electrochemical Treatment ◽  
Film Forming

scholarly journals Elucidation and Characterization of New Chlorinated By-Products after Electrochemical Degradation of Hydrochlorothiazide Using Graphite–Poly Vinyl Chloride Electrode

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 540
Author(s):  
Zainab Mussa ◽  
Fouad Al-Qaim ◽  
Ali Yuzir ◽  
Hirofumi Hara ◽  
Shamila Azman ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Treatment Process ◽  
Oxidation Process ◽  
Electrochemical Treatment ◽  
Electrochemical Process ◽  
Experimental Conditions ◽  
E Coli ◽  
Flight Mass Spectrometry ◽  
Negative Ionization ◽  
By Products

This paper describes an electrochemical treatment process of hydrochlorothiazide (HDZ) under different conditions such as initial concentration, sodium chloride and applied voltage. In this present study, HDZ was treated by electrochemical oxidation process using graphite-PVC composite electrode as anode and Platinum (Pt) as cathode. All results were analyzed using liquid chromatography-time of flight/mass spectrometry (LC-TOF/MS). It was found that at high applied voltages, and high amounts of NaCl, the electrochemical treatment process was more efficient. The removal% of HDZ was 92% at 5 V after 60 min. From the obtained results, the electrochemical oxidation process of HDZ followed pseudo first order with rate constant values ranged between 0.0009 and 0.0502 min−1, depending on the experimental conditions. Energy consumption was also considered in this study, it was ranged between 0.9058 and 5.56 Wh/mg using 0.5, 0.3 and 0.1 g NaCl within interval times of (10, 20, 30, 40, 50, 60, 70, and 80 min). Five chlorinated and one non-chlorinated by-products were formed and analyzed in negative ionization (NI) mode during the electrochemical process. Due to the strong oxidizing potential of the chlorine (Cl2) and hypochlorite ion (ClO−), HDZ and its by-products were removed after 140 min. Furthermore, a novel synthesis of chlorothiaizde as one of the new by-products was reported in this present study. Toxicity was impacted by the formation of the by-products, especially at 20 min. The inhibition percentage (I%) of E. coli bacteria was decreased to be the lowest value after 140 min.

Electrochemical treatment of mature landfill leachate using Ti/RuO2–IrO2 and Al electrode: optimization and mechanism

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47509-47519 ◽  
Author(s):  
Juan Li ◽  
Zhao-hui Yang ◽  
Hai-yin Xu ◽  
Pei-pei Song ◽  
Jing Huang ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Landfill Leachate ◽  
Electrochemical Treatment ◽  
Oxidation Technology ◽  
Mature Landfill Leachate

Today, improving the elimination of refractory pollutants in landfill leachate through electrochemical oxidation technology has attracted considerable attention.

Aqueous film forming foam and associated perfluoroalkyl substances inhibit methane production and Co-contaminant degradation in an anaerobic microbial community

2019 ◽  
Vol 21 (11) ◽  
pp. 1915-1925 ◽  
Author(s):  
Nicole J. M. Fitzgerald ◽  
Hanna R. Temme ◽  
Matt F. Simcik ◽  
Paige J. Novak
Keyword(s):  
Microbial Community ◽  
Methane Production ◽  
Perfluoroalkyl Substances ◽  
Contaminant Degradation ◽  
Film Forming ◽  
Anaerobic Microbial Community

This work determines the components of aqueous film forming foam responsible for disrupting microbial community functions.

PINO/NHPI-mediated selective oxidation of cycloalkenes to cycloalkenones via a photo-electrochemical method

2019 ◽  
Vol 55 (63) ◽  
pp. 9339-9342 ◽  
Author(s):  
Hiroyuki Tateno ◽  
Yugo Miseki ◽  
Kazuhiro Sayama
Keyword(s):  
Electrochemical Oxidation ◽  
Selective Oxidation ◽  
Electrochemical Method ◽  
Applied Bias ◽  
Indirect Oxidation

The photo-electrochemical oxidation of cyclohexene to 2-cyclohexene-1-one was successfully performed with excellent Faraday efficiency (>99%) via indirect oxidation with a PINO/NHPI mediator and O2 on a BiVO4/WO3 photoanode under low applied bias.

Anodic oxidation of organic compounds. V. Electrochemical oxidation of t-butyl hydroperoxide in presence of tetracyclone

1970 ◽  
Vol 48 (10) ◽  
pp. 1533-1535 ◽  
Author(s):  
N. L. Weinberg
Keyword(s):  
Ammonium Sulfate ◽  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Anodic Oxidation ◽  
Chemical Oxidation ◽  
Butyl Hydroperoxide ◽  
Oxidation Of Organic Compounds

A ring expanded lactone is obtained on electrochemical oxidation of t-BuOOH in presence of tetracyclone. The same product is formed on chemical oxidation of a mixture of t-BuOOH and tetracyclone with cerie ammonium sulfate or on heating the mixture to dryness.

Electrochemical Oxidation of o-Amiophenol in the Presence of NaCI for Wastewater Treatment

2014 ◽  
Vol 900 ◽  
pp. 382-385
Author(s):  
Chun Hong Nie ◽  
Bao Hui Wang
Keyword(s):  
Wastewater Treatment ◽  
Electrochemical Oxidation ◽  
Anodic Oxidation ◽  
Experimental Results ◽  
Oxidation Products ◽  
Chlorinated Compounds ◽  
Oxidation Analysis

The electrochemical oxidation of o-Aminophenol in the presence o f NaCl for wastewater treatment was studied on Ti/IrO2-Ta2O5 , Ti/IrO2-Ta2O5-SnO2 and Ti/IrO2 anodes. The experimental results have shown that the presence of NaCl catalyses the anodic oxidation of o-Aminophenol due to the participation of electrogenerated ClO- in the oxidation. Analysis of the oxidation products has shown that initially organo chlorinated compounds are formed in the electrolyte.

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