Device and method for ex-situ remediation of polluted underground water

The invention provides an ex-situ remediation device for polluted underground water. The device comprises a mixed reaction tank, a tubular static mixer, a manganese sand filter tank and dosing tanks, and is provided with a plurality of dosing tanks, and different drugs can be synchronously added to remove phenols, sulfonamides and perfluoroalkyl acid pollutants in underground water. The device can realize recycling of the medicament, improves the utilization rate of the medicament, reduces the treatment cost, and is convenient to maintain, long in service life, high in treatment efficiency, simple to operate and free of secondary pollution. The invention also provides a method for repairing the polluted underground water by using the device, a method for synchronously removing phenols, sulfonamides and perfluoroalkyl acid pollutants in the polluted underground water is constructed, the method has the advantages of large treatment capacity and high efficiency, the repairing agent can be recycled, and the cost