Reactivity screening of microscale zerovalent irons and iron sulfides towards different CAHs under standardized experimental conditions

► Standardized test procedure for studying the reactivity of iron was developed. ► Degradation kinetic for 23 different iron based particles towards different CAHs. ► Comparing to nZVI, newly designed mZVIs showed promising reactivity properties. ► The biogenic iron sulfides were the least reactive iron based particles.