scholarly journals Degradation of Nonylphenol Ethoxylate-10 (NPE-10) by Mediated Electrochemical Oxidation (MEO) Technology

2021 ◽  
Vol 50 (2) ◽  
pp. 373-381
Author(s):  
Henry Setiyanto ◽  
Muhammad. Muslim Syaifullah ◽  
I Made Adyatmika ◽  
Dian Ayu Setyorini ◽  
Muhammad Yudhistira Azis ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Electrochemical Treatment ◽  
Ionic Surfactant ◽  
Human Being ◽  
Redox Titration ◽  
Nonylphenol Ethoxylate ◽  
Mediated Electrochemical Oxidation ◽  
Back Titration ◽  
Alkylphenol Ethoxylate

Nonylphenol ethoxylate (NPE-10) is a non-ionic surfactant that is synthesized from alkylphenol ethoxylate. The accumulation of NPE-10 in wastewater will endanger the ecosystem as well as the human being. Nowadays, NPE-10 can be degraded indirectly by using an electrochemical treatment by the advancement of technology. Thus, this study is aimed to evaluate the electro-degradation potential of NPE-10 by MEO using Ce(IV) ionic mediator. In addition, the influence of Ag(I) ionic catalyst in the performance of MEO for the degradation of NPE-10 was also observed. The potency of MEO technology in the NPE-10 degradation was evaluated by voltammetry technique and confirmed by titrimetry and LC-MS analysis. The results showed that in the absence of Ag(I) ionic catalyst, the degradation of NPE-10 by MEO was 85.93%. Furthermore, when the Ag(I) ionic catalyst was applied, the performance of MEO in degradation of NPE-10 was improved to 95.12%. The back titration using Ba(OH)2 confirmed the formation of CO2 by 46.79%, whereas the redox titration shows the total of degradation organic compounds by 42.50%. It was emphasized by the formation of two new peaks in the LC-MS chromatogram. In summary, our results confirmed the potential of MEO technology for the NPE-10 degradation.

Preliminary studies using hybrid mediated electrochemical oxidation (HMEO) for the removal of persistent organic pollutants (POPs)

2007 ◽  
Vol 55 (1-2) ◽  
pp. 261-266 ◽  
Author(s):  
S.J. Chung ◽  
S. Balaji ◽  
M. Matheswaran ◽  
T. Ramesh ◽  
I.S. Moon
Keyword(s):  
Organic Carbon ◽  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Oxidation Process ◽  
Electrochemical Cell ◽  
Ethylenediaminetetraacetic Acid ◽  
Mediated Electrochemical Oxidation ◽  
Organic Destruction

This study investigates the hybrid mediated electrochemical oxidation (HMEO) technology, which is a newly developed non thermal electrochemical oxidation process for organic destruction. A combination of ozone and ultrasonication processes to the mediated electrochemical oxidation (MEO) process is termed as hybrid mediated electrochemical oxidation. The electrochemical cell was developed in this laboratory. In the present study, several organic compounds, such as phenol, benzoquinone and ethylenediaminetetraacetic acid (EDTA), were chosen as the model organic pollutants to be destructed by the hybrid process. The organic destruction was monitored based on the CO2 generation and total organic carbon (TOC) reduction. The HMEO process was found to be extremely effective in the destruction of all the target organics chosen in this study. The information obtained from this study will provide an insight in adopting this technique for dealing with more recalcitrant organics (POPs).

Electrochemical oxidation of organic compounds

1968 ◽  
Vol 68 (4) ◽  
pp. 449-523 ◽  
Author(s):  
N. L. Weinberg ◽  
H. R. Weinberg
Keyword(s):  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Oxidation Of Organic Compounds

scholarly journals Electrochemical oxidation as a post treatment for biologically tannery wastewater in batch reactor

2019 ◽  
Vol 80 (7) ◽  
pp. 1326-1337 ◽  
Author(s):  
Tran Le Luu ◽  
Djeuga Djeuga Franck Stephane ◽  
Nguyen Hoang Minh ◽  
Nguyen Duc Canh ◽  
Bui Xuan Thanh
Keyword(s):  
Energy Consumption ◽  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Current Density ◽  
Batch Reactor ◽  
Post Treatment ◽  
Pollutant Removal ◽  
Tannery Wastewater ◽  
Stirring Rate ◽  
A Current

Abstract Tannery wastewater is known to contain high concentrations of organic compounds, heavy metals, nitrogen, sulphur, chromium, and many other chemicals. Both aerobic and anaerobic biological approaches have proven ineffective in the treatment of tannery wastewater due to the high salinity and toxic chemicals contained within the medium. Electrochemical oxidation presents a promising method for solving this problem. High pollutant removal efficiency, low energy consumption, and high electrode stability are three important factors supporting the feasibility of an efficient electrochemical treatment process. In the present study, electrochemical oxidation was performed as a post treatment for tannery wastewater (after biological pre-treatment) in a batch reactor using Ti/RuO2, Ti/IrO2, and Ti/BDD anodes. The effects of pH, current density, stirring rate and treatment time were studied to assess the treatment efficiency as well as the energy consumption of the process. The results showed that colour, chemical oxygen demand (COD), total organic carbon (TOC), and total nitrogen (TN) removal efficiencies on the electrodes were: Ti/RuO2 (88.8%, 88.40%, 64.0%, 96.4%), Ti/IrO2 (85.40%, 85.9%, 52.3%, 51.4%), Ti/BDD (90.60%, 94.7%, 90.5%, 82.7%) respectively, at a current density of 80 mA/cm2. All three electrodes demonstrated optimal performance at a pH of 8, a stirring rate of 400 rpm, a current density of 80 mA/cm2, and an electrolysis time of 5 h. The concentration of tri-chloromethane by-product was detected with limiting value. Electrochemical oxidation thus offers a feasible method for removing organic compounds and nutrients from tannery wastewater.

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 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.

scholarly journals Predicting reactivity of model DOM compounds towards chlorine with mediated electrochemical oxidation

2017 ◽  
Vol 114 ◽  
pp. 113-121 ◽  
Author(s):  
Glen Andrew de Vera ◽  
Wolfgang Gernjak ◽  
Jelena Radjenovic
Keyword(s):  
Electrochemical Oxidation ◽  
Mediated Electrochemical Oxidation

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.

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