Comment to the article “Hydroxyl radical scavenging by solid mineral surfaces in oxidative treatment systems: Rate constants and implications” published by K. Rusevova Crincoli and S. G. Huling in Water Research 169, 2020, 115240

Abstract

The fate of radicals in aqueous suspensions can be significantly affected by surfaces scavenging reactions. When short-lived radicals such as •OH are considered, mass-transfer limitation may come into play. Disregarding these limitations may lead to heavy overestimation of surface-mediated reactions. The present comment exposes a potential misinterpretation of experimental data in a recent study with implications for in-situ chemical oxidation (ISCO) techniques.