Degradation performance of carbamazepine by ferrous-activated sodium hypochlorite: Mechanism and impacts on the soil system

•Fe2+-activated NaOCl could effectively degrade Carbamazepine (CBZ) in the soil system.•The effects of operation factors on the Fe2+/NaOCl process were investigated.•Reaction mechanisms for CBZ degradation in soil were proposed.•Microbial community in soil system was negatively affected by Fe2+/NaOCl treatment.