In order to explore the in-situ remediation technique for groundwater in the decommissioned mining area of acid in situ leaching uranium, silicate and phosphate, which are green remediation agents with low cost and no secondary pollution, was used to repair it. The sandstone uranium ore samples were firstly taken from a decommissioned area of acid in situ leach uranium mining in northwest China, the simulated water samples were prepared based on the groundwater in the decommissioned field, and the microcosm for simulating the remediation reacti...