Equipment for treating pollutants in the ground, comprising ground treatment tooling comprising: • a tubular core having a longitudinal axis and a bottom end; • a rotary drilling and mixing tool constrained to rotate with the bottom end of the core; • means for rotating the tubular core about its axis; • a plurality of ground-stirring members (28, 30) for stirring cut ground that are mounted along the length of the tubular core and secured to rotate therewith in order to keep at least a portion of the borehole surrounding the core in destructured form, said stirring members being distinct from one another; • at least one main injector nozzle for injecting a fluid under pressure into the ground and mounted at the bottom end of said tubular core; • means arranged in said core to feed said injector nozzle with fluid under pressure; • suction means (34, 36) for sucking up the fluid and arranged at the top portion of the borehole being made; and • sealing means (31, 33, 39) for sealing the top end of the borehole; whereby said fluid under pressure rises via the zone of the borehole surrounding the core and maintained in a destructured state by said stirring members while entraining said pollutants, the tubular core further comprising a plurality of secondary fluid injector nozzles arranged between its top end and its bottom end, said equipment further comprising at least one source of fluid under pressure, and being characterized in that said means for feeding fluid under pressure comprise a plurality of pipes (70, 72, 74) arranged in said tubular core, each pipe having a top end connected to said source of fluid under pressure and a bottom end connected to one of said injector nozzles. • a tubular core having a longitudinal axis and a bottom end; • a rotary drilling and mixing tool constrained to rotate with the bottom end of the core; • means for rotating the tubular core about its axis; • a plurality of ground-stirring members (28, 30) for stirring cut ground that are mounted along the length of the tubular core and secured to rotate therewith in order to keep at least a portion of the borehole surrounding the core in destructured form, said stirring members being distinct from one another; • at least one main injector nozzle for injecting a fluid under pressure into the ground and mounted at the bottom end of said tubular core; • means arranged in said core to feed said injector nozzle with fluid under pressure; • suction means (34, 36) for sucking up the fluid and arranged at the top portion of the borehole being made; and • sealing means (31, 33, 39) for sealing the top end of the borehole; whereby said fluid under pressure rises via the zone of the borehole surrounding the core and maintained in a destructured state by said stirring members while entraining said pollutants, the tubular core further comprising a plurality of secondary fluid injector nozzles arranged between its top end and its bottom end, said equipment further comprising at least one source of fluid under pressure, and being characterized in that said means for feeding fluid under pressure comprise a plurality of pipes (70, 72, 74) arranged in said tubular core, each pipe having a top end connected to said source of fluid under pressure and a bottom end connected to one of said injector nozzles.