Rational Design of Dimensionally Stable Anodes for Active Chlorine Generation

ACS Catalysis ◽  
2021 ◽  
pp. 12423-12432
Author(s):  
Hyun Woo Lim ◽  
Deok Ki Cho ◽  
Jae Hyun Park ◽  
Su Geun Ji ◽  
You Jin Ahn ◽  
...  
Keyword(s):  
Rational Design ◽  
Active Chlorine ◽  
Dimensionally Stable Anodes ◽  
Chlorine Generation

In situ active chlorine generation for the treatment of dye-containing effluents

2009 ◽  
Vol 39 (12) ◽  
pp. 2397-2408 ◽  
Author(s):  
François Zaviska ◽  
Patrick Drogui ◽  
Jean-François Blais ◽  
Guy Mercier
Keyword(s):  
Active Chlorine ◽  
Chlorine Generation

Kinetic modeling of active chlorine generation by low-amperage pulsating direct current in a circulating brine solution

2009 ◽  
Vol 92 (4) ◽  
pp. 461-466 ◽  
Author(s):  
Khamtorn Pudtikajorn ◽  
Il-Shik Shin ◽  
Woo-Sik Jeong ◽  
Donghwa Chung
Keyword(s):  
Kinetic Modeling ◽  
Direct Current ◽  
Active Chlorine ◽  
Brine Solution ◽  
Chlorine Generation

scholarly journals Performance Investigation of Electrochemical Assisted HClO/Fe2+ Process For The Treatment of Landfill Leachate

2021 ◽  
Author(s):  
Zhihong Ye ◽  
Fei Miao ◽  
Hui Zhang
Keyword(s):  
Current Density ◽  
Landfill Leachate ◽  
Chloride Concentration ◽  
Ammonia Nitrogen ◽  
Active Chlorine ◽  
Bulk Liquid ◽  
Applied Current ◽  
Promising Alternative ◽  
Applied Current Density ◽  
Chlorine Generation

Abstract The feasibility of removal of COD and ammonia nitrogen (NH4+-N) from landfill leachate by electrochemical assisted HClO/Fe2+ process is demonstrated for the first time. The performance of active chlorine generation at the anode was evaluated in Na2SO4/NaCl media, and a higher amount of active chlorine was produced at greater chloride concentration and higher current density. The probe experiments confirmed the coexistence of hydroxyl radical (·OH) and Fe(IV)-oxo complex (FeIVO2+) in the HClO/Fe2+ system. The influence of initial pH, Fe2+ concentration and applied current density on COD and NH4+-N abatement was elaborately investigated. The optimum pH was found to be 3.0, and the proper increase in Fe2+ dosage and current density resulted in higher COD removal due to the accelerated accumulation of ·OH and FeIVO2+ in the bulk liquid phase. Whereas, the NH4+-N oxidation was significantly affected by the applied current density because of the effective active chlorine generation at high current, but was nearly independent of Fe2+ concentration. The reaction mechanism of electrochemical assisted HClO/Fe2+ treatment of landfill leachate was finally proposed. The powerful ·OH and FeIVO2+, in concomitance with active chlorine and M(·OH) were responsible for COD abatement and active chlorine played a key role in NH4+-N oxidation. The proposed electrochemical assisted HClO/Fe2+ process is a promising alternative for the treatment of refractory landfill leachate.

scholarly journals Development of RuO2/TiO2 titanium anodes and a device for in situ active chlorine generation

2013 ◽  
Vol 67 (2) ◽  
pp. 313-321 ◽  
Author(s):  
Miroslav Spasojevic ◽  
Tomislav Trisovic ◽  
Lenka Ribic-Zelenovic ◽  
Pavle Spasojevic
Keyword(s):  
Sodium Chloride ◽  
Ion Selectivity ◽  
Water Disinfection ◽  
Raw Material ◽  
Active Chlorine ◽  
Operational Parameters ◽  
Technological Parameters ◽  
Corrosion Stability ◽  
New Findings ◽  
Chlorine Generation

Chlorine is used worldwide for water disinfection purposes. However, due to its toxicity the EU has imposed a set of standards that must be applied when transporting and storing chlorine. In Serbia, numerous studies have been conducted attempting to develop the technology for the generation of active chlorine disinfectant but with a non-toxic aqueous solution of sodium chloride as the raw material. This study provides an overview of the titanium anodes activated by thermally obtained solid solution of ruthenium and titanium oxide development. It also presents new findings on the effect of the temperature of thermal treatment, the composition, the thickness of an active coating on its microstructural properties, and consequently on the catalytic activity, ion selectivity, and corrosion stability during active chlorine generation through the electrolysis of dilute sodium chloride solutions at room temperature. The study also evaluates the effect of the kinetic and operational parameters of the electrochemical process of active chlorine generation on both current and energy efficiencies. The results obtained were used to determine optimal values of technological parameters of the production process. This comprehensive research resulted in the construction of different types of remote-controlled and fully automated active chlorine generating plants.

scholarly journals Electrolytic Oxidation as a Sustainable Method to Transform Urine into Nutrients

Processes ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 460
Author(s):  
Nasr Bensalah ◽  
Sondos Dbira ◽  
Ahmed Bedoui ◽  
Mohammad I. Ahmad
Keyword(s):  
Thin Film ◽  
Oxygen Demand ◽  
Organic Pollution ◽  
Active Chlorine ◽  
Boron Doped Diamond ◽  
Dimensionally Stable Anodes ◽  
Boron Doped ◽  
Electrolytic Oxidation ◽  
Current Densities ◽  
Electrolytic Treatment

In this work, the transformation of urine into nutrients using electrolytic oxidation in a single-compartment electrochemical cell in galvanostatic mode was investigated. The electrolytic oxidation was performed using thin film anode materials: boron-doped diamond (BDD) and dimensionally stable anodes (DSA). The transformation of urine into nutrients was confirmed by the release of nitrate (NO3−) and ammonium (NH4+) ions during electrolytic treatment of synthetic urine aqueous solutions. The removal of chemical oxygen demand (COD) and total organic carbon (TOC) during electrolytic treatment confirmed the conversion of organic pollutants into biocompatible substances. Higher amounts of NO3− and NH4+ were released by electrolytic oxidation using BDD compared to DSA anodes. The removal of COD and TOC was faster using BDD anodes at different current densities. Active chlorine and chloramines were formed during electrolytic treatment, which is advantageous to deactivate any pathogenic microorganisms. Larger quantities of active chlorine and chloramines were measured with DSA anodes. The control of chlorine by-products to concentrations lower than the regulations require can be possible by lowering the current density to values smaller than 20 mA/cm2. Electrolytic oxidation using BDD or DSA thin film anodes seems to be a sustainable method capable of transforming urine into nutrients, removing organic pollution, and deactivating pathogens.

Highly Selective Active Chlorine Generation Electrocatalyzed by Co3O4 Nanoparticles: Mechanistic Investigation through in Situ Electrokinetic and Spectroscopic Analyses

2019 ◽  
Vol 10 (6) ◽  
pp. 1226-1233 ◽  
Author(s):  
Heonjin Ha ◽  
Kyoungsuk Jin ◽  
Sunghak Park ◽  
Kang-Gyu Lee ◽  
Kang Hee Cho ◽  
...  
Keyword(s):  
Active Chlorine ◽  
Co3o4 Nanoparticles ◽  
Spectroscopic Analyses ◽  
Mechanistic Investigation ◽  
Chlorine Generation

Self-powered electrochemical system by combining Fenton reaction and active chlorine generation for organic contaminant treatment

Nano Research ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2729-2735 ◽  
Author(s):  
Yawei Feng ◽  
Kai Han ◽  
Tao Jiang ◽  
Zhenfeng Bian ◽  
Xi Liang ◽  
...  
Keyword(s):  
Fenton Reaction ◽  
Organic Contaminant ◽  
Active Chlorine ◽  
Electrochemical System ◽  
Self Powered ◽  
Chlorine Generation

Molecular insights on the dynamic stability of peptide nucleic acid functionalized carbon and boron nitride nanotubes

2021 ◽  
Vol 23 (1) ◽  
pp. 219-228
Author(s):  
Nabanita Saikia ◽  
Mohamed Taha ◽  
Ravindra Pandey
Keyword(s):  
Nucleic Acid ◽  
Boron Nitride ◽  
Nucleic Acids ◽  
Dynamic Stability ◽  
Peptide Nucleic Acid ◽  
Rational Design ◽  
Peptide Nucleic Acids ◽  
Boron Nitride Nanotubes ◽  
Molecular Hybrids ◽  
Single Wall Nanotubes

The rational design of self-assembled nanobio-molecular hybrids of peptide nucleic acids with single-wall nanotubes rely on understanding how biomolecules recognize and mediate intermolecular interactions with the nanomaterial's surface.

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