Degradation of oxamic acid using dimensionally stable anodes (DSA) based on a mixture of RuO2 and IrO2 nanoparticles

Chemosphere ◽  
2020 ◽  
Vol 251 ◽  
pp. 126674 ◽  
Author(s):  
L. Carolina Espinoza ◽  
Pamela Sepúlveda ◽  
Alejandra García ◽  
Denis Martins de Godoi ◽  
Ricardo Salazar
Keyword(s):  
Dimensionally Stable Anodes

scholarly journals Ti/RuO2-IrO2-SnO2 Anode for Electrochemical Degradation of Pollutants in Pharmaceutical Wastewater: Optimization and Degradation Performances

2020 ◽  
Vol 13 (1) ◽  
pp. 126
Author(s):  
Guozhen Zhang ◽  
Xingxing Huang ◽  
Jinye Ma ◽  
Fuping Wu ◽  
Tianhong Zhou
Keyword(s):  
Removal Rate ◽  
Inorganic Compounds ◽  
Oxide Coating ◽  
X Ray Diffraction ◽  
Pharmaceutical Wastewater ◽  
High Concentration ◽  
Dimensionally Stable Anodes ◽  
X Ray ◽  
Initial Ph ◽  
Cod Removal Rate

Electrochemical oxidation technology is an effective technique to treat high-concentration wastewater, which can directly oxidize refractory pollutants into simple inorganic compounds such as H2O and CO2. In this work, two-dimensionally stable anodes, Ti/RuO2-IrO2-SnO2, have been developed in order to degrade organic pollutants from pharmaceutical wastewater. Characterization by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) showed that the oxide coating was successfully fabricated on the Ti plate surface. Electrocatalytic oxidation conditions of high concentration pharmaceutical wastewater was discussed and optimized, and the best results showed that the COD removal rate was 95.92% with the energy consumption was 58.09 kW·h/kgCOD under the electrode distance of 3 cm, current density of 8 mA/cm2, initial pH of 2, and air flow of 18 L/min.

Dimensionally Stable Anodes used in Hard Chrome Plating

2015 ◽  
Vol 8 (2) ◽  
pp. 50-51
Author(s):  
Thomas Ebert ◽  
Frank Friebel
Keyword(s):  
Dimensionally Stable Anodes ◽  
Chrome Plating ◽  
Hard Chrome

scholarly journals Inactivation of Rhizoctonia solani in fertigation water using regenerative in situ electrochemical hypochlorination

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Serge Lévesque ◽  
Thomas Graham ◽  
Dorin Bejan ◽  
Jamie Lawson ◽  
Ping Zhang ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Plant Pathogens ◽  
Effective Means ◽  
Free Chlorine ◽  
Cell Contact ◽  
Pathogen Inactivation ◽  
Dimensionally Stable Anodes ◽  
Pathogen Control ◽  
Treatment Technologies

Abstract The capture and re-use of greenhouse fertigation water is an efficient use of fertilizer and limited water resources, although the practice is not without risk. Plant pathogens and chemical contaminants can build up over successive capture and re-use cycles; if not properly managed they can lead to reduced productivity or crop loss. There are numerous established and emerging water treatment technologies available to treat fertigation water. Electrochemical processes are emerging as effective means for controlling pathogens via in situ regenerative hypochlorination; a process that is demonstrated here to achieve pathogen control in fertigation solutions without leading to the accumulation of potentially phytotoxic free chlorine residuals associated with other chlorination processes. An electrochemical flow cell (EFC) outfitted with ruthenium dioxide (RuO2) dimensionally stable anodes (DSA) was characterized and evaluated for free chlorine production and Rhizoctonia solani inactivation in both irrigation and fertigation solutions. Pathogen inactivation was achieved at low current densities and short residence or cell contact times. Effluent free chlorine concentrations were significantly lower than commonly reported phytotoxic threshold values (approximately 2.5 mg/L) when fertilizer (containing ammonium) was present in the test solution; an effect attributable to reactions associated with breakpoint chlorination, including chloramine formation, as well as the presence of other oxidizable compounds in the fertilizer. Chloride concentrations were stable under the test conditions suggesting that the EFC was operating as a regenerative in situ electrochemical hypochlorination system. No significant changes to macronutrient concentrations were found following passage through the EFC.

scholarly journals Study on Electrochemical Degradation of Nicosulfuron by IrO2-Based DSA Electrodes: Performance, Kinetics, and Degradation Mechanism

2019 ◽  
Vol 16 (3) ◽  
pp. 343 ◽  
Author(s):  
Rui Zhao ◽  
Xuan Zhang ◽  
Fanli Chen ◽  
Xiaobing Man ◽  
Wenqiang Jiang
Keyword(s):  
High Performance ◽  
Degradation Mechanism ◽  
Electrochemical Process ◽  
Electrode Spacing ◽  
Human Beings ◽  
Electrochemical Degradation ◽  
Dimensionally Stable Anodes ◽  
Liquid Chromatograph ◽  
Crack Network ◽  
Electrolysis Condition

The widely used sulfonylurea herbicides have caused negative effects on the environment and human beings. Electrochemical degradation has attracted much attention in the treatment of refractory organic compounds due to its advantage of producing no secondary pollution. Three kinds of IrO2-based dimensionally stable anodes (DSAs) were used to degrade nicosulfuron by a batch electrochemical process. The results showed that a well-distributed crack network was formed on the Ti/Ta2O5-IrO2 electrode and Ti/Ta2O5-SnO2-IrO2 electrode due to the different coefficients of thermal expansion between the Ti substrate and oxide coatings. The oxygen evolution potential (OEP) increased according to the order of Ti/RuO2-IrO2 < Ti/Ta2O5-SnO2-IrO2 < Ti/Ta2O5-IrO2. Among the three electrodes, the Ti/Ta2O5-IrO2 electrode showed the highest efficiency and was chosen as the experimental electrode. Single factor experiments were carried out to obtain the optimum electrolysis condition, shown as follows: currency intensity 0.8 A; electrode spacing 3 cm, electrolyte pH 3. Under the optimum conditions, the degradation of nicosulfuron followed first-order kinetics and was mainly due to indirect electrochemical oxidation. It was a typical diffusion-controlled electrochemical process. On the basis of the intermediate identified by high performance liquid chromatograph-mass spectrometry (HPLC-MS), two possible degradation routes were proposed.

Phenol Contaminated Water Treatment on Several Modified Dimensionally Stable Anodes

2017 ◽  
Vol 89 (8) ◽  
pp. 687-693
Author(s):  
Pavithra Bhakthi Jayathilaka ◽  
Kushani Umanga Kumari Hapuhinna ◽  
Athula Bandara ◽  
Nadeeshani Nanayakkara ◽  
Nalaka Deepal Subasinghe
Keyword(s):  
Water Treatment ◽  
Contaminated Water ◽  
Dimensionally Stable Anodes

Ternary dimensionally stable anodes composed of RuO2 and IrO2 with CeO2, SnO2, or Sb2O3 for efficient naphthalene and benzene electrochemical removal

2017 ◽  
Vol 47 (4) ◽  
pp. 547-561 ◽  
Author(s):  
Danilo T. Araújo ◽  
Maria de A. Gomes ◽  
Ronaldo S. Silva ◽  
Camila C. de Almeida ◽  
Carlos A. Martínez-Huitle ◽  
...  
Keyword(s):  
Dimensionally Stable Anodes ◽  
Electrochemical Removal
Sign in / Sign up

Export Citation Format

Share Document