Ohmic Losses Dominated Electrode Fouling during Long-Term Aluminum Electrocoagulation of Hypersaline and Divalent Cation-Rich Oilfield-Produced Water.

ABSTRACT: Electrode behavior was elucidated during long-term galvanostatic electrocoagulation (aluminum anode and aluminum cathode) of a hypersaline oilfield produced water rich in divalent cations. Electrode potentials progressively increased (i.e., fouling) for most operational conditions due to surface accumulation of calcite and brucite. The interfacial resistance resulting from partial insulation by electrodeposited salts was quantified by using electrochemical impedance spectroscopy. The potential drop associated with this resistance correlated strongly and positively with the increased overpotential required to maintain the galvanostatic operation and was statistically indistinguishable from the calculated ohmic drop, confirming that electrode fouling could be fully attributed to ohmic effect

SUBMITTER: Joag S 

PROVIDER: S-EPMC12706792 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature