Electrochemical oxygen demand

In this context see also Refs. [83a, 83b]. Comninellis and Plattner [287,287a, 288] have developed a simple method for estimating the facility of the electrochemical oxidation of organic species based on a newly defined electrochemical oxidizability index (EOI) and the degree of oxidation using the electrochemical oxygen demand (EOD). Electrochemical oxidizability index for various benzene derivatives obtained at Pt/Ti and Sn02-ABB-anodes are listed in Table 23. [Pg.214]

By calculating the fraction of current that oxidizes EOD species, as opposed to the fraction that oxidizes water, the electrochemical oxygen demand (EOD) [in g02g organic-1] (gorg) is determined as follows ... [Pg.256]

The Electrochemical Oxygen Demand is calculated using the relationship (Comninellis and Pulgarin 1991) ... [Pg.26]

Comninellis formulated the electrochemical oxidizability index (EOI) and the electrochemical oxygen demand (EOD) to quantify the anodic mineralization or... [Pg.374]

It expresses the amount of "electrochemically formed oxygen used for oxidation of the organic pollutants. The Electrochemical Oxygen Demand (EOD) can be calculated using the relation... [Pg.85]

Lee K-H, Ishikawa T, McNiven SJ, et al. (1999) Evaluation of chemical oxygen demand (COD) based on coulometric determination of electrochemical oxygen demand (EOD) using a surface oxidized c opper electrode. Analytica Chimica Acta 398 161-171. [Pg.5086]

In this work, the parameters Electrochemical Oxidation Index (EOI) and Electrochemical Oxygen Demand (EOD), involved in the electrochemical treatment of organic pollutants, are presented [1-6]. From these parameters, both the degree of oxidation (X) and the average oxidation state of carbon (Ox) in the wastewater can be calculated during treatment [6]. [Pg.944]

The Electrochemical Oxygen Demand after a given time t of electrolysis (EODt ) expresses the amormt of electrochemically formed oxygen (g m ) used for the oxidation of the organic pollutants. EODt can be calcirlated using the relationship [1-6] ... [Pg.945]

Rajasekar S, MadhavVM, Rajasekar R, Jeyakmnar D, Rao GP (1992) Biosensor for the estimation of biological oxygen demand based Torulopsis Candida. Bull Electrochem 8 196-198... [Pg.113]

Jeong, B.G., S.M. Yoon, C.H. Choi, et al. 2007. Performance of an electrochemical COD (chemical oxygen demand) sensor with an electrode-surface grinding unit. J. Environ. Monit. 9 1352-1357. [Pg.238]

In these equations, COD (t) is the chemical oxygen demand at time t (mol 02 m-3), I is the current intensity (A), F is the Faraday constant (96,487C mol-1), apPi is the applied current density (Am-2), km the mass-transfer coefficient (ms-1), and ICE is the instantaneous current efficiency. For a typical-batch electrochemical... [Pg.112]

Chemical Oxygen Demand (COD) Catalytical oxidation, microwave oxidation, combustion oxidation, electrochemical oxidation, ozonation oxidation... [Pg.85]

Two methods have been used for the determination of the current efficiency during the electrochemical oxidation of the organic pollutant (OP). The oxygen flow rate method and the COD (Chemical Oxygen Demand) method. [Pg.78]

Similar to PANI, the carbon-related materials, activated carbon, carbon nanotube, and GO, were also doped with PPy to fabricate PPy/carbon-related material composites for wastewater treatment. PPy/impregnated porous carbon was prepared by vapor infiltration polymerization technique to obtain a mesoporous structure [72], The as-prepared composite exhibited an improved adsorption ability to remove heavy metal ions, such as Hg(II), Pb(II), and Ag(I) due to amino groups of PPy. PPy/carbon nanotube composites can be prepared by grafting from technique either chemically or electrochemically. The chemical fabricated PPy/carbon nanotube composite can effectively remove heavy metals, anions and chemical oxygen demand from paper mill waste [73]. The electrochemical synthesized PPy/carbon nanotube provided a simple and highly effective method for ClO removal via electrically switched ion exchange technique (Figure 11.15) [74]. [Pg.604]

However, the electrochemical oxygen evolution reaction (OER) from the water in acid solutions is thermodynamically slightly more favorable than the CER given by Eq. 2 (the fP value for the OER is 1.229 V). Bearing in mind that electrocatalysis essentially implies the activity and selectivity of various electrode materials toward a certain electrode reaction [2], the correct choice of electrode material that is of high electrocatalytic activity for the CER and of lower activity for the OER is of extreme importance. Anyhow, CAT is always subjected to current loss due to the OER as a side reaction. This fact sets additional demands toward the anode material for the CER, i.e., its stability toward the OER and consequently its durability in CAT. [Pg.412]

The instantaneous current efficiency (ICE) is an important global parameter commonly used to estimate the progress and the efficiency of electrochemical treatments. ICE is calculated from the experimental variation of chemical oxygen demand (COD) according to Eq. (1) [4, 6] ... [Pg.578]

Organic Pollutants in Water Using DSA Electrodes, In-Cell Mediated (via Active Chlorine) Electrochemical Oxidation, Fig. 7 Influence of NaCl concentration on the rate of chemical oxygen demand (COD) elimination. (a) 150 g dm Na2S04 (b) 150 g dm Na2S04 + NaCl. NaCl concentration (A) 433, ( ) 85, and ( ) 17 mM. Conditions i = 0.1 A cm, T = 50 °C, pH 12.2, and initial phenol concentration 10 mM (Adapted from [48]. Reprinted with permission from Springer)... [Pg.1412]

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