TITLE

Anodic oxidation of 2,4-dihydroxybenzoic acid for wastewater treatment

AUTHOR(S)
De Lima Leite, R.H.; Cognet, P.; Wilhelm, A.-M.; Delmas, H.
PUB. DATE
August 2003
SOURCE
Journal of Applied Electrochemistry;Aug2003, Vol. 33 Issue 8, p693
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Dihydroxybenzoic acid (2,4-DHBA) is used as an intermediate chemical reactant in industrial synthetic processes. Disinfection of water contaminated by 2,4-DHBA, using chlorinating techniques, generates trihalomethane compounds, so that alternative degradation techniques are of interest. The electrochemical oxidation of 2,4-dihydroxybenzoic acid (2,4-DHBA) at a platinized titanium electrode was investigated. An electroanalytical study by linear and cyclic voltammetry showed adsorption of the reagent at the electrode surface. Mathematical treatment of cyclic voltammetry curves indicates Langmuir type adsorption. For electrolysis, working in the oxygen evolution region causes an increase in electroactive electrode surface area and better mass transfer at the electrode. For example, for an initial 2,4-DHBA concentration of 0.3 kg m-3 and a current density of 300 A m-2, almost complete conversion of the pollutant is obtained after passing 4 A h, together with a TOC decrease of 30%. Byproducts of electrodegradation include 2,3,4- and 2,4,5-trihydroxybenzoic acids (THBA), maleic acid, glyoxalic acid and oxalic acid. The faradaic yield is less than 18%, due to oxygen evolution during electrolysis.
ACCESSION #
16781797

 

Related Articles

  • PEO of rheocast A356 Al alloy: energy efficiency and corrosion properties. Mohedano, Marta; Matykina, Endzhe; Arrabal, Raul; Mingo, Beatriz; Zheludkevich, Mikhail L. // Surface & Interface Analysis: SIA;Aug2016, Vol. 48 Issue 8, p953 

    PEO coatings were developed under voltage-controlled mode on a rheocast A356 aluminum alloy without and with pretreatment by conventional anodizing in sulphuric acid.Microstructure and composition of uncoated and coated materialswere studied using SEM, EDS and XRD. The anodic precursor oxide...

  • Growth and characterization of GeO... films obtained by plasma anodization of epitaxial Ge films. Busani, T.; Plantier, H. // Journal of Applied Physics;4/15/1999 Part 1 of 2, Vol. 85 Issue 8, p4262 

    Presents information on a study which examined the growth and characterization of germanium oxide films obtained by plasma anodization of epitaxial germanium (Ge) films. Plasma assisted oxidation of epitaxial Ge films; Infrared absorption measurements after oxide growth; Experimental results;...

  • ELECTROCHEMICAL TREATMENT OF ACID WASTEWATERS CONTAINING METHYLORANGE. Samide, Adriana; Dumitru, Mădălina; Ciuciu, Adina; Tutunaru, Bogdan; Preda, Mircea // Studia Universitatis Babes-Bolyai, Chemia;2009, Issue 4, p157 

    The degradation process of solutions containing Methylorange using electrochemical measurements, on Ti electrode was studied. In order to estimate the contribution of pure adsorption, behavior of Methylorange in open circuit was investigated. The color removal (CR) due to adsorption was...

  • Anomalies in high-field growth of aluminium oxide using pulse anodizing. Schneider, M.; Lämmel, C.; Heubner, C.; Michaelis, A. // Surface & Interface Analysis: SIA;Oct2013, Vol. 45 Issue 10, p1497 

    The present work is motivated by own studies about the heat impact during hard anodizing where the influence of voltage pulse modulation on the temperature development inside anodic films was investigated. For a better understanding of the interplay between pulse modulation and oxide formation,...

  • Surface modification of titanium by anodic oxidation in phosphoric acid at low potentials. Part 2. In vitro and in vivo study. Gomez Sanchez, A.; Schreiner, W.; Ballarre, J.; Cisilino, A.; Duffó, G.; Ceré, S. // Surface & Interface Analysis: SIA;Sep2013, Vol. 45 Issue 9, p1395 

    Electrochemical studies in SBF solution were performed, in order to determine the best corrosion resistance condition, comparing as-received titanium, covered with its native surface oxide, and titanium anodized in phosphoric acid. The results indicate that the anodic films obtained at a...

  • Titanium anodizing protects surfaces of medical devices.  // Advanced Materials & Processes;Oct2005, Vol. 163 Issue 10, p58 

    Features the titanium anodizing process offered at the Electrolizing Corp. of Ohio. Advantages of the process; Technologies incorporated in anodizing; Overview of the process.

  • Electrochemical sulfur passivation of GaAs. Hou, X.Y.; Cai, W.Z. // Applied Physics Letters;5/4/1992, Vol. 60 Issue 18, p2252 

    Focuses on the development of sulfur passivation method as the anodic sulfurized technique of gallium arsenide (GaAs). Detection of the bonding of Ga and As atoms to silicon atoms; Analysis of the surface recombination velocity based on the photoluminescence spectra; Influence of passivated...

  • Electrochemical oxidation of p-chlorophenol on SnO2–Sb2O5 based anodes for wastewater treatment. Zanta, Carmem L.P.S.; Michaud, Pierre-Alan; Comninellis, Christos; De Andrade, Adalgisa R.; Boodts, Julien. F.C. // Journal of Applied Electrochemistry;Dec2003, Vol. 33 Issue 12, p1211 

    The influence of an IrO2 interlayer between the Ti substrate and the SnO2–Sb2O5 coating on the electrode service life and on the efficiency of p-chlorophenol (p-CP) oxidation for wastewater treatment has been investigated. The results have shown that if the loading of the...

  • Impact of different alloying additives and pre-treatments on the anodising behaviour of AA2007. Schlögl, C. M.; Antrekowitsch, H. // Surface & Interface Analysis: SIA;Aug2016, Vol. 48 Issue 8, p939 

    Most of the common alloying additives in wrought aluminium alloys have a strong impact on the anodising process and the aluminium oxide surface layer produced. Depending on their concentration, appearance in the aluminium matrix and electrochemical behaviour, they lead to different colouring and...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics