The electrochemical elimination of coliforms from water using BBD/Ti or graphite anodes: A comparative study

3Citations
Citations of this article
20Readers
Mendeley users who have this article in their library.

Abstract

The elimination of total and fecal coliforms, from raw surface water, was carried out by electrochemical oxidation using either boron doped diamond (BDD/Ti) or graphite (GP) anodes, in a chloride-free medium. The optimal values of the operation parameters, maximizing the coliform elimination percentage, were determined using statistical experimental design. The current density ( j: 2-20 mA/cm2), the conductivity (s: 500-900 μS/cm) and the anode materials (An) were considered as variables to perform the Box-Behnken experimental design together with the response surface methodology analysis for optimization. The statistical analysis indicated that, in the evaluated range, the disinfection efficiency increased with an increase in j and decreased with an increase in s. The following optimal conditions for the elimination of total and fecal coliforms were found: j: 10 mA/cm2, s: 500 μS/cm and BDD/Ti used as anode material. The BDD/Ti electrode let to achieve complete coliform elimination after ca. 20 min of reaction while the GP one needed ca. 27 min. In water treated with both BDD/Ti and GP anode, after 7 days, any coliforms growth was observed. As a result of the oxidation process, the total organic carbon and nitrite concentration decreased while nitrate concentration increased.

Cite

CITATION STYLE

APA

GilPavas, E., Arbeláez, P., Medina, J. D., Dobrosz-Gómez, I., & Gómez-García, M. Á. (2018). The electrochemical elimination of coliforms from water using BBD/Ti or graphite anodes: A comparative study. Water Supply, 18(2), 408–417. https://doi.org/10.2166/ws.2017.147

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free