A remediation system, comprising: a heating chamber (20) having an inlet for a contaminated medium to be purified, an outlet for a purified medium and an outlet for exhaust gas emitted while heating the medium; a source of hot air (60) for heating the medium inside the heating chamber (20); microwave generators (21) for heating the medium in the heating chamber; a catalytic combustion unit (30) for catalytic combustion of the exhaust gas emitted from the heating chamber (20) to outlet a purified gas; a heat exchanger (40) for generating a stream of heated air by heating air with a heat from the purified gas; wherein the stream of the heated air from the heat exchanger (40) is introduced to the heating chamber (20).
