Pyrite-enhanced methylene blue degradation in non-thermal plasma water treatment reactor

► We use O2 as the feed gas and pyrite was added to the non-thermal plasma reactor. ► The methylene blue removal by NTP increased in the presence of pyrite. ► The total organic carbon content decreased substantially. ► The acute toxicity test showed that the treated solution is not toxic. ► The dye degradation occurs via electron impact as well as successive hydroxylation.