Related Experiment Video
Updated: May 20, 2026

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
Replacing dichromate with hydrogen peroxide in the chemical oxygen demand (COD) test
Patricia Carbajal-Palacios1, Patricia Balderas-Hernández, Jorge G Ibanez
1Centro Conjunto de Investigacion en Quimica Sustentable UAEMex-UNAM, Carretera Toluca-Atlacomulco Km 14.5, 50200 Toluca, Mexico.
Abstract:
The widely used standard method for chemical oxygen demand (COD) involves hazardous chromium species, and its two-hour heating protocol entails a substantial amount of energy expenditure. In the present work we report a proof of concept for a major modification of this method in the range 10-800 mgCOD/L, whereby H2O2 is proposed as a replacement oxidizer. This modification not only reduces the use of unsafe chromium species but also allows for the use of milder conditions that decrease the total energy outlay. The results are comparable with those obtained either with the standard method or with a commercial Hach® kit.
More Related Videos
08:31Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
Published on: October 3, 2018
11:47Evaluation of the Efficacy of Organic Peroxyacids for Eradicating Dairy Biofilms Using an Approach Combining Static and Dynamic Methods
Published on: December 9, 2022
Related Concept Videos
Redox Titration: Other Oxidizing and Reducing Agents
Catalysis
Catalysis
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
Oxidation of Alcohols
The process of oxidation in a chemical reaction is observed in any of the three forms:
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide