Work

Accelerated lifetime of Ti/RuO2 electrodes in environments with high concentrations of ammonia, chloride and organic matter

Year: 2025

Type: article

Abstract: Electrooxidation has proven to be an efficient technique for treating effluents containing ammoniacal nitrogen and organic matter. In the present study, electrooxidation trials were conducted with an ammoniacal effluent generated at a fertilizer depot, containing 0.24 mol L −1 of N-NH 3 and 0.90 mol L −1 of Cl − . The Ti/RuO 2 electrodes were used in a stirred batch electrochemical reactor. The results obtained, employing a current density of 60 mA cm −2 , showed degradation rates of 99.9% for ammoniacal nitrogen and 75.6% for organic matter. Accelerated anode degradation tests with the same solution, maintaining a constant current density of 1,000 mA cm −2 , indicated that after 300 h, a partial dissolution of the RuO 2 coating was observed, along with the formation of a passive TiO 2 film and an increase of approximately 24% of the initial anodic potential value. Considering a working current density of 60 mA cm −2 , the estimated service life of the Ti/RuO 2 anode is 6 years.

Source: Discover Chemical Engineering

DOI: 10.1007/s43938-025-00096-7

Authors: Flávio de A. Lemos, Caroline R. dos S. Brigido, Iranildes D. dos Santos, Achilles J. B. Dutra, Paulo F. A. Braga

Institutions: Centro de Tecnologia Mineral, Vale Technological Institute, Universidade Federal do Rio de Janeiro

Language: English

Topic: Advanced oxidation water treatment

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,590