DC Electric Fields Promote Biodegradation of Waterborne Naphthalene in Biofilter Systems.

ABSTRACT: Biofiltration is a simple and low-cost method for the cleanup of contaminated water. However, the reduced availability of dissolved chemicals to surface-attached degrader bacteria may limit its efficient use at certain hydraulic loadings. When a direct current (DC) electric field is applied to an immersed packed bed, it invokes electrokinetic processes, such as electroosmotic water flow (EOF). EOF is a surface-charge-induced plug-flow-shaped movement of pore fluids. It acts at a nanometer distance above surfaces and allows the change of microscale pressure-driven flow profiles and, hence, the availability of dissolved contaminants to microbial degraders. In laboratory percolation columns, we assessed the effects of a weak DC electric field (E = 0.5 V·cm^-1) on the biodegra

SUBMITTER: He J 

PROVIDER: S-EPMC11483754 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature