Hydrogeochemical patterns, processes and mass transfers during aquifer storage and recovery (ASR) in an anoxic sandy aquifer

► We identify and quantify in time and space the main hydrogeochemical processes. ► We study the effects of subsequent ASR cycles. ► We identify Fe(II) and Mn(II) removal during recovery by particle tracking. ► We quantify and predict the leaching of reactive phases. ► We propose solutions to mitigate the Mn(II) problems in the recovered water.